HFBR-14xxZ and HFBR-24xxZ Series Low-Cost, 820 nm Miniature Link Fiber Optic Components with ST, SMA, SC, and FC Ports Data Sheet Description Features The 820 nm Miniature Link Series of components is designed to provide cost-effective, high-performance fiber optic communication links for information systems and industrial applications with link distances of several kilometers. With the HFBR-24x6Z, the 125 MHz analog receiver, data rates of up to 160 MBaud can be attained. RoHS compliant Transmitters and receivers are directly compatible with popular "industry-standard" connectors: ST, SMA, SC, and FC. They are completely specified with multiple fiber sizes; including 50/125 m, 62.5/125 m, 100/140 m, and 200 m. Link distances up to several kilometers Products are available in various options. For example, transmitters with the improved protection option P show an increased ESD resistance to the pins. This HFBR-141xPxZ integrated solution is realized by including a Zener diode parallel to the LED. The HFBR-14x4Z high-power transmitter and HFBR-24x6Z 125 MHz receiver pair up to provide a duplex solution optimized for 100BASE-SX. 100BASE-SX is a Fast Ethernet Standard (100 Mb/s) at 850 nm on multimode fiber. Evaluation kits are available for ST products, including transmitter, receiver, eval board, and technical literature. Low-cost transmitters and receivers Choice of ST, SMA, SC, or FC ports 820 nm wavelength technology Signal rates up to 160 MBaud Compatible with 50/125 m, 62.5/125 m, 100/140 m, and 200 m Plastic-Clad Silica (PCS) Fiber Repeatable ST connections within 0.2 dB typical Unique optical port design for efficient coupling Pick and place, and wave solderable No board-mounting hardware required Wide operating temperature range -40C to +85C Conductive port option Applications 100BASE-SX Fast Ethernet on 850 nm Media/fiber conversion, switches, routers, hubs, and NICs on 100BASE-SX Local area networks Computer-to-peripheral links and computer monitor links Digital cross connect links Central office switch/PBX links Video links Modems and multiplexers Suitable for Tempest systems Industrial control links Broadcom -1- HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Part Number Guide A/HFBR - x 4 x x aa Z 1 Transmitter 2 Receiver 4 820 nm Transmitter and Receiver products 0 SMA, housed 1 ST, housed 2 FC, housed E SC, housed RoHS Compliant P Protection improved option T Threaded port option C Conductive port receiver option M Metal port option 2 TX, standard power 4 TX, high power 2 RX, 5 MBaud, TTL output 5 TX, high light output power 6 RX, 125 MHz, Analog Output 8 RX, DC to 50 MBaud, Digital Output 9 RX, 100 KBaud to 50 MBaud, Digital Output Available Options HFBR-1402Z HFBR-1404Z HFBR-1412PTZ HFBR-1412PZ HFBR-1412TMZ HFBR-1412TZ HFBR-1412Z HFBR-1414PTZ HFBR-1414PZ HFBR-1414MZ HFBR-1414TZ HFBR-1414Z HFBR-1415PMZ HFBR-1415TZ HFBR-1415Z HFBR-1424Z HFBR-14E4Z HFBR-2402Z HFBR-2406Z HFBR-2412TCZ HFBR-2412TZ HFBR-2412Z HFBR-2412MZ HFBR-2416MZ HFBR-2416TCZ HFBR-2416TZ HFBR-2416Z HFBR-2422Z HFBR-24E2Z HFBR-24E6Z AFBR-2408Z AFBR-2418Z AFBR-2418TZ AFBR-2418MZ AFBR-2409Z AFBR-2419Z AFBR-2419TZ AFBR-2419MZ Note: For better readability of the electrical and optical specifications, all available options (P, T, C, and M) are covered by the HFBR-x4xxZ product name; exceptions are explicitly noted. Note: AFBR-24x8xZ receivers are designed for data rates from DC up to 50 MBaud. AFBR-24x9xZ supports transmissions from 100 KBaud up to 50 MBaud. Refer to the separate data sheets for details about these digital optical receivers providing CMOS/TTL output logic. Link Selection Guide For additional information about specific links, see the individual link descriptions. The HFBR-1415Z can be used for increased power budget or for lower driving current for the same Data Rates and Link Distances. Data Rate (MBaud)1 Distance (m) Transmitter Receiver Fiber Size (m) Evaluation Kit DC to 5 1500 HFBR-14x2Z HFBR-24x2Z 62.5/125 HFBR-0410Z 20 2700 HFBR-14x4Z/14x5Z HFBR-24x6Z 62.5/125 HFBR-0416Z 20 to 32 2200 HFBR-14x4Z/14x5Z HFBR-24x6Z 62.5/125 HFBR-0416Z DC to 50 2000 HFBR-14x4Z/14x5Z AFBR-24x8xZ 62.5/125 AFBR-0549Z 0.1 to 50 1000 HFBR-14x4Z/14x5Z AFBR-24x9xZ 62.5/125 AFBR-0550Z 20 to 55 1400 HFBR-14x4Z/14x5Z HFBR-24x6Z 62.5/125 HFBR-0416Z 20 to 125 700 HFBR-14x4Z/14x5Z HFBR-24x6Z 62.5/125 HFBR-0416Z 20 to 155 600 HFBR-14x4Z/14x5Z HFBR-24x6Z 62.5/125 HFBR-0416Z 20 to 160 500 HFBR-14x4Z/14x5Z HFBR-24x6Z 62.5/125 HFBR-0416Z 1. The data rate range in the table refers to the evaluation kit documentation. For an analog receiver, like the HFBR-24x6Z, the data rate range depends on the receiver circuit used. Broadcom -2- HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Options In addition to the various port styles available for the HFBR-0400Z series products, there are also several extra options that can be ordered. To order an option, simply place the corresponding option number at the end of the part number. See page 2 for available options. Option P (Protection improved option) Designed to withstand electrostatic discharge (ESD) of 2 kV (HBM) to the pins Available on TX with non-conductive ST and non-conductive threaded ST ports Option T (Threaded Port Option) Allows ST style port components to be panel mounted Compatible with all current makes of ST multimode connectors Mechanical dimensions are compliant with MIL-STD- 83522/13 Maximum wall thickness when using nuts and washers from the HFBR-4411Z hardware kit is 2.8 mm (0.11 inch) Available on all ST ports Option C (Conductive Port Receiver Option) Designed to withstand electrostatic discharge (ESD) of 25 kV to the optical port Significantly reduces effect of electromagnetic interference (EMI) on receiver sensitivity Allows designer to separate the signal and conductive port grounds Recommended for use in noisy environments Available on threaded ST port style receivers only The conductive port is connected to Pins 1, 4, 5, and 8 through the Port Grounding Path Insert Option M (Metal Port Option) Nickel plated aluminum connector receptacle Designed to withstand electrostatic discharge (ESD) of 15 kV to the optical port Significantly reduces effect of electromagnetic interference (EMI) on receiver sensitivity Allows designer to separate the signal and metal port grounds Recommended for use in very noisy environments Available on ST and threaded ST ports The metal port is connected to Pins 1, 4, 5, and 8 through the Port Grounding Path Insert Broadcom -3- HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Applications Support Guide This section gives the designer information necessary to use the 820 nm Miniature Link Series components to make a functional optical transmission link. Broadcom offers evaluation kits for hands-on experience with fiber optic products as well as a wide range of application notes complete with circuit diagrams and board layouts. Furthermore, Broadcom's application support group is always ready to assist with any design consideration. Application Literature Title Description Application Note 1065 Complete Solutions for IEEE 802.5J Fiberoptic Token Ring Application Note 1121 DC to 32 MBaud Fiberoptic Solutions Application Note 1122 2 to 70 MBaud Fiberoptic Solutions Application Note 1123 20 to 160 MBaud Fiberoptic Solutions Application Note 1137 Generic Printed Circuit Layout Rules Evaluation Kits Broadcom offers fiber optic kits that facilitate a simple means to evaluate and experience our products. These fiber optic kits contain all the components and tools required for customers to quickly evaluate and access the value of our products within their respective applications. HFBR-0410Z ST Evaluation Kit: DC to 5 MBaud 820 nm Fiber Optic Eval Kit Contains the following: One HFBR-1412Z transmitter One HFBR-2412Z receiver Eval board Related literature HFBR-0416Z Evaluation Kit: 125 MBaud 820 nm Fiber Optic Eval Kit Contains the following: One HFBR-1414Z transmitter One HFBR-2416Z receiver Eval board Related literature AFBR-0549Z Evaluation Kit: DC to 50 MBaud 820 nm Fiber Optic Eval Kit Contains the following: One HFBR-1414PTZ transmitter One AFBR-2418TZ receiver Eval board Related literature Broadcom -4- HFBR-14xxZ and HFBR-24xxZ Series Data Sheet AFBR-0550Z Evaluation Kit: Up to 50 MBaud 820 nm Fiber Optic Eval Kit Contains the following: One HFBR-1414PTZ transmitter One AFBR-2419TZ receiver Eval board Related literature Package and Handling Information Package Information All transmitters and receivers of the 820 nm Miniature Link Series are housed in a low-cost, dual-inline package that is made of high strength, heat resistant, chemically resistant, and UL 94V-O flame retardant plastic (UL File #E121562). The transmitters are easily identified by the light grey color connector port. The receivers are easily identified by the dark grey color connector port. (Black color for conductive port). The package is designed for pick and place and wave soldering so it is ideal for high volume production applications. Handling and Design Information Each part comes with a protective port cap or plug covering the optics. Note: This plastic or rubber port cap is made to protect the optical path during assembly. It is not meant to remain on the part for a long period. These caps/plugs will vary by port style. When soldering, it is advisable to leave the protective cap on the unit to keep the optics clean. Good system performance requires clean port optics and cable ferrules to avoid obstructing the optical path. Clean compressed air often is sufficient to remove particles of dirt; methanol on a cotton swab also works well. Recommended Chemicals for Cleaning/Degreasing 820 nm Miniature Link Products Alcohols: methyl, isopropyl, isobutyl. Aliphatics: hexane, heptane, Other: soap solution, naphtha. Do not use partially halogenated hydrocarbons (such as 1.1.1 trichloroethane), ketones (such as MEK), acetone, chloroform, ethyl acetate, methylene dichloride, phenol, methylene chloride, or N-methylpyrolldone. Also, Broadcom does not recommend the use of cleaners that use halogenated hydrocarbons because of their potential environmental harm. Broadcom -5- HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Mechanical Dimensions (SMA Port) HFBR-x40xZ 12.7 (0.50) AVAGO COUNTRY OF ORIGIN HFBR-x40xZ TX/RX YYWW 1/4 - 36 UNS 2A THREAD 22.2 (0.87) 6.35 (0.25) 12.7 (0.50) 6.4 (0.25) DIA. 3.81 (0.15) 3.6 (0.14) 5 6 4 3 2.54 (0.10) 8 1 2 7 PINS 2,3,6,7 0.46 DIA. (0.018) 10.2 (0.40) 1.27 (0.05) 2.54 (0.10) PINS 1,4,5,8 0.51 X 0.38 (0.020 X 0.015) 5.1 (0.20) PIN NO. 1 INDICATOR Dimensions in mm (inches) Mechanical Dimensions (ST Port) 12.7 (0.50) AVAGO COUNTRY OF ORIGIN HFBR-x41xZ TX/RX YYWW HFBR-x41xZ 4.9 max. (0.193) 8.2 (0.32) 27.2 (1.07) 6.35 (0.25) 12.7 (0.50) 7.0 DIA. (0.28) 3.81 (0.15) 5.1 (0.20) 1.27 (0.05) 3 6 4 5 2.54 (0.10) PINS 2,3,6,7 O0.46 (0.018) 1 8 2 7 PINS 1,4,5,8 0.51 X 0.38 (0.020 X 0.015) 2.54 (0.10) 3.6 (0.14) PIN NO. 1 INDICATOR Dimensions in mm (inches) Broadcom -6- 10.2 (0.40) HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Mechanical Dimensions (Metal ST Port) HFBR-x41xMZ 12.7 (0.50) AVAGO COUNTRY OF ORIGIN HFBR-x41xMZ TX/RX YYWW 4.9 MAX. (0.193) 8.4 (0.33) 27.2 (1.07) 6.35 (0.25) 12.7 (0.50) 7.0 DIA. (0.28) 3.81 (0.15) 3.6 (0.14) 5.1 (0.20) 1.27 (0.05) 2.54 (0.10) 7 6 2 3 4 5 2.54 (0.10) 1 8 PINS 1,4,5,8 0.51 x 0.38 (0.020 x 0.015) PINS 2,3,6,7 0.46 DIA. (0.018) DIA. 10.2 (0.40) PIN NO. 1 INDICATOR Dimensions in mm (inches) Mechanical Dimensions (Threaded ST Port) HFBR-x41xTZ 12.7 (0.50) 4.9 MAX. (0.193) AVAGO COUNTRY OF ORIGIN HFBR-x41xTZ TX/RX YYWW 5.1 (0.20) 8.4 (0.33) 27.2 (1.07) 7.6 (0.30) 6.35 (0.25) 12.7 (0.50) 7.1 DIA. (0.28) 2.54 DIA. (0.10) 1.27 (0.05) 2 3 7 6 4 5 2.54 (0.10) 1 8 PINS 2,3,6,7 0.46 DIA. (0.018) 5.1 (0.20) 3/8 - 32 UNEF - 2A 3.81 (0.15) PINS 1,4,5,8 0.51 x 0.38 (0.020 x 0.015) 3.6 (0.14) PIN NO. 1 INDICATOR Dimensions in mm (inches) Broadcom -7- 10.2 (0.40) HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Mechanical Dimensions (FC Port) HFBR-x42xZ 12.7 (0.50) AVAGO COUNTRY OF ORIGIN HFBR-x42xZ TX/RX YYWW M8 x 0.75 6G THREAD (METRIC) 19.6 (0.77) 12.7 (0.50) 7.9 (0.31) 3.6 (0.14) 5.1 (0.20) 10.2 (0.40) 3.81 (0.15) PINS 1,4,5,8 0.51 X 0.38 (0.020 X 0.015) 2 3 7 6 4 5 2.54 (0.10) 1 8 PINS 2,3,6,7 O 0.46 (0.018) 2.54 (0.10) PIN NO. 1 INDICATOR Dimensions in mm (inches) Mechanical Dimensions (SC Port) AVAGO COUNTRY OF ORIGIN HFBR-x4ExZ TX/RX YYWW HFBR-x4ExZ 28.65 (1.128) 6.35 (0.25) 12.7 (0.50) 10.0 (0.394) Dimensions in mm (inches) 1.27 (0.05) 2.54 (0.10) 3 4 5 7 6 8 2.54 (0.10) 2 PINS 1,4,5,8 0.51 x 0.38 (0.020 x 0.015) PINS 2,3,6,7 O 0.46 (0.018) 5.1 (0.20) 15.95 (0.628) 1 3.81 (0.15) 10.38 (0.409) 3.60 (0.14) 12.7 (0.50) PIN NO. 1 INDICATOR Broadcom -8- HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Cross-Sectional View LED OR DETECTOR IC LENS-SPHERE (ON TRANSMITTERS ONLY) HOUSING LENS-WINDOW CONNECTOR PORT HEADER EPOXY BACKFILL PORT GROUNDING PATH INSERT Figure 1: HFBR-x41xTZ ST Series Cross-Sectional View Panel Mount Hardware HFBR-4401Z: for SMA Ports HFBR-4411Z: for ST Ports 1/4 - 36 UNEF 2B THREAD 3/8 - 32 UNEF 2B THREAD 12.70 DIA. (0.50) 1.65 (0.065) HEX-NUT 1.65 (0.065) HEX-NUT 14.27 TYP. (0.563) DIA. 10.41 MAX. (0.410) DIA. 0.14 (0.005) WASHER 3/8 - 32 UNEF 2A THREADING 1 THREAD AVAILABLE 7.87 TYP. (0.310) DIA. 6.61 DIA. (0.260) 0.2 IN. PART NUMBER AVAGO COUNTRY OF ORIGIN HFBR-x40xZ TX/RX YYWW 7.87 DIA. (0.310) DATE CODE 0.46 (0.018) WASHER (Each HFBR-4401Z and HFBR-4411Z kit consists of 100 nuts and 100 washers). Dimensions in mm (inches) Port Cap Hardware HFBR-4402Z: 500 SMA Port Caps HFBR-4120Z: 500 ST Port Plugs Broadcom -9- WALL NUT WASHER HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Typical Link Data The following technical data is taken from 5 MBaud and 155 MBaud link using the 820 nm Miniature Link Series. This data is meant to be regarded as an example of typical link performance for a given design and does not call out any link limitations. 5 MBaud Link (HFBR-14xxZ/24x2Z) Link Performance -40C to +85C unless otherwise specified Parameter Symbol Min. Typ. Optical Power Budget with 50/125 m fiber OPB50 4.2 9.6 dB HFBR-14x4Z/24x2Z NA = 0.2 Note 1 Optical Power Budget with 62.5/125 m fiber OPB62.5 8.0 15 dB HFBR-14x4Z/24x2Z NA = 0.27 Note 1 Optical Power Budget with 100/140 m fiber OPB100 8.0 15 dB HFBR-14x2Z/24x2Z NA = 0.30 Note 1 Optical Power Budget with 200 m fiber OPB200 13.0 20 dB HFBR-14x2Z/24x2Z NA = 0.37 Note 1 Data Rate Max. DC 5 Unit MBaud Propagation Delay LOW to HIGH tPLH 72 ns Propagation Delay HIGH to LOW tPHL 46 ns tPLH - tPHL 26 ns System Pulse Width Distortion Bit Error Rate BER 10-9 Notes: 1. 2. Optical Power Board at TA = -40C to +85C, VCC = 5.0Vdc, IF ON = 60 mA. PR = -24 dBm peak. Data rate limit is based on these assumptions: a. 50% duty factor modulation, e.g., Manchester I or BiPhase Manchester II b. Continuous data c. PLL Phase Lock Loop demodulation d. TTL threshold. Broadcom - 10 - Conditions Reference Note 2 TA = +25C PR = -21 dBm peak Fiber cable length =1m Data rate < 5 MBaud PR > -24 dBm peak Figures 6, 7, 8 HFBR-14xxZ and HFBR-24xxZ Series Data Sheet 5 MBaud Logic Link Design The resistor R1 is the only significant element in the drive circuit (see Figure 2) that limits the current through the LED, apart from the gates output port. Depending on the actual gate used, the voltage drop on the output port Vport could be neglected. The forward voltage value, VF, of the LED depends on the desired LED current and on the temperature (see Figure 9). Make sure you take this behavior into account for the calculations. The curves in Figure 3, Figure 4, and Figure 5 are constructed assuming no inline splice or any additional system loss. Besides fiber attenuation, for correct power budget calculation, make sure you take into account the effect of bending, humidity, ambient temperature, aging and other relevant influences. All these additional losses reduce the achievable link distance accordingly. For calculating the LED's aging effect, an additional loss of about 1.5 dB is recognized. The following example will illustrate the technique for selecting the appropriate value of IF and R1: R1 = VCC - VF IF Maximum distance required = 2000 meters by using HFBR-14x4Z/24x2Z logic link with 62.5/125 m fiber. Figure 4 shows the "worst-case" drive current of about 43 mA for reaching a distance of about 2000 meters. Figure 9 shows the transmitter forward voltage of about VF = 1.62V. If the typical circuit configuration (Figure 2) is used at Vcc = 5.0 V, the resistor value "R1" should be choosen to 78.6 (3.38 V/43 mA) for reaching driver current of about 43 mA. Page 16 shows the guaranteed HFBR-14x4Zs optical output power limit of -16.0 dBm (for driver current of 60 mA) over the entire temperature range. Figure 10 shows the normalized typical output power. When the transmitter will be driven with 43 mA the optical output power is about 0.70 or -1.55 dB lower than at 60 mA. With an assumed fiber attenuation of 3.2 dB/km and the reduced driver current of 43 mA, the minimum optical output power at fiber end is about -24 dBm, which is equal to the receiver sensitivity over the entire temperature range. For balancing the individual additional system losses, the driver current must be increased accordingly. Figure 2. Typical Circuit Configuration SELECT R 1 TO SET I F IF R +5 V 1 1K 2 6 7 3 TTL DATA OUT HFBR - 24x 2Z RECEIVER HFBR - 14x xZ TRANSMITTER 2 T R 6 RL 7&3 V CC 0.1 F DATA IN 1/2 75451 TRANSMISSION DISTANCE = Note: A bypass capacitor (0.01 F to 0.1 F ceramic) must be connected from pin 2 to pin 7 of the receiver. Total lead length between both ends of the capacitor and the pins should not exceed 20 mm. The following diagrams (Figure 3 to Figure 5) serve as an aid in Link Design and are based on theoretical calculations. For broad use, no additional effects such as aging were taken into account. The additional losses and the individual safety buffer values should be added separately. These diagrams reflect the pure viewing of power budget and do not allows conclusions about the actual link quality. Overdrive: Maximum optical output power of Tx combined with receiver sensitivity of -10 dBm over the entire temperature range. Typical 25C: Typical optical output power of Tx combined with receiver sensitivity of -25.4 dBm at TA = 25C. Worst Case: Minimum optical output power of Tx combined with receiver sensitivity of -24 dBm over the entire temperature range. Broadcom - 11 - HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Figure 4: Typical HFBR-14x4xZ/HFBR-24x2xZ Link with 62.5/125 m Fiber 100 100 90 90 80 Typical Transmitter current (mA) Typical Transmitter current (mA) Figure 3: Typical HFBR-14x4xZ/HFBR-24x2xZ Link with 100/140 m Fiber OVERDRIVE Worst Case TYPICAL, 25C 70 60 50 40 30 20 10 0 0 1 2 3 Fiber Length (km) (Fiber Attenuation: 4 dB/km) 80 70 OVERDRIVE Worst Case TYPICAL, 25C 60 50 40 30 20 10 0 4 0 1 2 3 Fiber Length (km) (Fiber Attenuation: 3.2 dB/km) 4 Figure 5: Typical HFBR-14x4xZ/HFBR-24x2xZ Link with 50/125 m Fiber 100 Typical Transmitter current (mA) 90 Worst Case TYPICAL, 25C 80 70 60 50 40 30 20 10 0 0 1 2 3 Fiber Length (km) (Fiber Attenuation: 2.7 dB/km) 4 Figure 7: Typical Pulse Width Distortion of Link (HFBR-14x4Z/HFBR-24x2Z) measured at TA=25C, 5 MBaud, and with 1m of Cable Figure 6: Typical Propagation Delay Times of Link (HFBR-14x4Z/ HFBR-24x2Z) measured at TA=25C, 5 MBaud, and with 1m of Cable 55 75 tPLH (TYP) @ 25C 65 50 60 45 55 tD - NRZ DISTORTION - ns tPLH OR tPHL - PROPOGATION DELAY -ns 70 50 45 tPHL (TYP) @ 25C 40 35 30 40 35 30 25 25 20 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 20 PR - RECEIVER POWER - dBm -22 -21 -20 -19 -18 -17 -16 -15 PR - RECEIVER POWER - dBm Broadcom - 12 - -14 -13 -12 HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Figure 8: System Propagation Delay Test Circuit and Waveform Timing Definitions PULSE GEN +15V RESISTOR VALUE AS NEEDED FOR SETTING OPTICAL POWER OUTPUT FROM RECEIVER END OF TEST CABLE RS 1N4150 2, 6, 7 1/2 75451 RS IF 3 INPUT (I FROM 1-METER TEST CABLE F) tPHLT 2 RL 560 6 0.1 F 7&3 OUTPUT 15 pF + P T 50% TIMING ANALYSIS EQUIPMENT eg. SCOPE +5 V 100 ns 50% tPHLT TRANSMITTER PT - PULSE REPETITION FREQ = 1 MHz 100 ns INPUT tPHL MAX VO VO tPHL MIN tPHL MAX tPHL MIN 5V 1.5V 0 HFBR-2412Z RECEIVER 155 MBaud Link (HFBR-14x4Z/24x6Z) Typical Link Performance Parameter Symbol Min. Typ. [1, 2] Max. Unit Conditions Optical Power Budget with 50/125 m fiber OPB50 13.9 dB NA = 0.2 Optical Power Budget with 62.5/125 m fiber OPB62 17.7 dB NA = 0.27 Optical Power Budget with 100/140 m fiber OPB100 17.7 dB NA = 0.30 Optical Power Budget with 200 m PCS fiber OPB200 22.0 dB NA = 0.35 Data Format 20% to 80% Duty Factor System Pulse Width Distortion Bit Error Rate 20 160 |tPLH - tPHL| 1 BER 10-9 Reference Note 2 MBaud ns PR = -7 dBm peak 1 m 62.5/125 m fiber Data rate < 100 MBaud PR > -31 dBm peak Note 2 Notes: 1. Typical data at TA = +25C, VCC = 5.0Vdc, PECL serial interface. 2. Typical OPB was determined at a probability of error (BER) of 10-9. Lower probabilities of error can be achieved with short fibers that have less optical loss. Broadcom - 13 - HFBR-14xxZ and HFBR-24xxZ Series Data Sheet HFBR-14x2Z/14x4Z/14x5Z Low-Cost High-Speed Transmitters Description The HFBR-14xxZ fiber optic transmitter contains an 820 nm AlGaAs emitter capable of efficiently launching optical power into four different optical fiber sizes: 50/125 m, 62.5/125 m, 100/140 m, and 200 m Plastic-Clad Silica (PCS). This allows the designer flexibility in choosing the fiber size. The HFBR14xxZ is designed to operate with the Broadcom Ltd. HFBR24xxZ fiber optic receivers. The HFBR-14xxZ transmitter's high coupling efficiency allows the emitter to be driven at low current levels resulting in low power consumption and increased reliability of the transmitter. The HFBR-14x4Z high power transmitter is optimized for small size fiber and typically can launch -15.8 dBm optical power at 60 mA into 50/125 m fiber and -12 dBm into 62.5/125 m fiber. The HFBR-14x2Z standard transmitter typically can launch -12 dBm of optical power at 60 mA into 100/140 m fiber cable. It is ideal for large size fiber such as 100/140 m. The high launched optical power level is useful for systems where star couplers, taps, or inline connectors create large fixed losses. Note: Parameters "reverse input voltage" and "diode capacitance" for "HFBR-141xPxZ" transmitters deviate from the non P-parts. Consistent coupling efficiency is assured by the double-lens optical system (Figure 1 on page 9). Power coupled into any of the three fiber types varies less than 5 dB from part to part at a given drive current and temperature. Consistent coupling efficiency reduces receiver dynamic range requirements, which allows for longer link lengths. Housed Product ANODE CATHODE For 820 nm Miniature Link transmitters with protection improved option "P" a Zener diode parallel to the LED was implemented. Therefore, a higher ESD capability could be attained. PIN 11 2 32 41 51 6 72 81 2, 6, 7 3 4 3 2 1 BOTTOM VIEW 5 6 7 8 FUNCTION NC ANODE CATHODE NC NC ANODE ANODE NC PIN 1 INDICATOR NOTES: 1. PINS 1, 4, 5, AND 8 ARE ELECTRICALLY CONNECTED. 2. PINS 2, 6, AND 7 ARE ELECTRICALLY CONNECTED TO THE HEADER. Regulatory Compliance - Targeted Specifications Feature Performance Reference Electrostatic Discharge (ESD) Class 1C (>1000V, <2000V) - Human Body Model Note 1, 4 Class 1B (>500V, <1000V) - Human Body Model Note 1, 2 Absolute Maximum Ratings Symbol Min. Max. Unit Storage Temperature Parameter TS -55 +85 C Operating Temperature TA -40 +85 C +260 10 C sec Lead Soldering Cycle Temp Time Forward Input Current Peak dc IFPK IFdc 200 100 mA mA Reverse Input Voltage VBR 1.8 V 0.3 V Notes: 1. 2. 3. 4. ESD capability for all pins HBM (Human Body Model) according JEDEC JESD22-A114. Valid for not protection improved transmitter option For IFPK > 100 mA, the time duration should not exceed 2 ns. Only valid for HFBR-141xPxZ (Protection improved option). Broadcom - 14 - Reference Note 3 Note 4 HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Electrical/Optical Specifications -40C to +85C unless otherwise specified. Parameter Forward Voltage Symbol Min. Typ. [2] Max. Unit VF 1.48 1.70 2.09 V 1.84 Forward Voltage Temperature Coefficient Reverse Input Voltage VF/T Peak Emission Wavelength lP Diode Capacitance CT Optical Power Temperature Coefficient -0.22 mV/K IF = 60 mA dc 3.8 V IF = -100 A dc 0.3 0.7 V IF = -100 A dc 792 820 865 pF V = 0, f = 1 MHz 70 pF V = 0, f = 1 MHz -0.006 dB/K -0.010 JA 490 14x2Z Numerical Aperture NA 0.49 14x4Z Numerical Aperture NA 0.31 14x2Z Optical Port Diameter D 14x4Z Optical Port Diameter D Note 10 nm 55 Thermal Resistance Figure 9 IF = 100 mA dc 1.8 PT/T Reference Figure 9 IF = 100 mA dc -0.18 VBR Conditions IF = 60 mA dc Note 10 I = 60 mA dc I = 100 mA dc K/W Notes 3, 8 290 m Note 4 150 m Note 4 HFBR-14x2Z Output Power Measured Out of 1 Meter of Cable Parameter 50/125 m Fiber Cable Symbol Min. Typ. Max. PT50 -21.8 -18.8 -16.8 dBm peak TA = +25C, IF = 60 mA -15.8 dBm peak TA = -40C to +85C, IF = 60 mA -14.4 dBm peak TA = +25C, IF = 100 mA -13.8 dBm peak TA = -40C to +85C, IF = 100 mA -14.0 dBm peak TA = +25C, IF = 60 mA -13.0 dBm peak TA = -40C to +85C, IF = 60 mA -11.6 dBm peak TA = +25C, IF = 100 mA -11.0 dBm peak TA = -40C to +85C, IF = 100 mA -22.8 -20.3 -16.8 -21.9 62.5/125 m Fiber Cable PT62 -19.0 -16.0 -20.0 -17.5 -14.0 -19.1 100/140 m Fiber Cable PT100 -15.0 -12.0 -16.0 -13.5 -10.0 -15.1 200 m PCS Fiber Cable PT200 -10.0 -7.0 -11.0 -8.5 -10.1 -5.0 Unit Conditions -10 dBm peak TA = +25C, IF = 60 mA -9.0 dBm peak TA = -40C to +85C, IF = 60 mA -7.6 dBm peak TA = +25C, IF = 100 mA -7.0 dBm peak TA = -40C to +85C, IF = 100 mA -5.0 dBm peak TA = +25C, IF = 60 mA -4.0 dBm peak TA = -40C to +85C, IF = 60 mA -2.6 dBm peak TA = +25C, IF = 100 mA -2.0 dBm peak TA = -40C to +85C, IF = 100 mA CAUTION: The small junction sizes inherent to the design of these components increase the components' susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. Broadcom - 15 - Reference Notes 5, 6, 9 Figure 10 HFBR-14xxZ and HFBR-24xxZ Series Data Sheet HFBR-14x4Z Output Power Measured out of 1 Meter of Cable Parameter 50/125 m Fiber Cable NA = 0.2 Symbol Min. Typ. [2] Max. Unit PT50 -18.8 -15.8 -13.8 dBm peak TA = +25C, IF = 60 mA -12.8 dBm peak TA = -40C to +85C, IF = 60 mA -11.4 dBm peak TA = +25C, IF = 100 mA -10.8 dBm peak TA = -40C to +85C, IF = 100 mA -10.0 dBm peak TA = +25C, IF = 60 mA -9.0 dBm peak TA = -40C to +85C, IF = 60 mA -7.6 dBm peak TA = +25C, IF = 100 mA -7.0 dBm peak TA = -40C to +85C, IF = 100 mA -6.5 dBm peak TA = +25C, IF = 60 mA -5.5 dBm peak TA = -40C to +85C, IF = 60 mA -4.1 dBm peak TA = +25C, IF = 100 mA -3.5 dBm peak TA = -40C to +85C, IF = 100 mA -2.5 dBm peak TA = +25C, IF = 60 mA -1.5 dBm peak TA = -40C to +85C, IF = 60 mA -0.1 dBm peak TA = +25C, IF = 100 mA 0.5 dBm peak TA = -40C to +85C, IF = 100 mA -19.8 -17.3 -13.8 -18.9 62.5/125 m Fiber Cable NA = 0.275 PT62 -15.0 -12.0 -16.0 -13.5 -10.0 -15.1 100/140 m Fiber Cable NA = 0.3 PT100 -11.5 -8.5 -12.5 -10.0 -6.5 -11.6 200 m PCS Fiber Cable NA = 0.37 PT200 -7.5 -4.5 -8.5 -6.0 -2.5 -7.6 Conditions Reference Notes 5, 6, 9 Figure 10 HFBR-14x5Z Output Power Measured out of 1 Meter of Cable Symbol Min. Typ. Max. Unit 50/125 m Fiber Cable NA = 0.2 Parameter PT50 -16.5 -14.3 -11.5 dBm peak TA = +25C, IF = 60 mA -10.5 dBm peak TA = -40C to 85C, IF = 60 mA 62.5/125 m Fiber Cable NA = 0.275 PT62 -8.0 dBm peak TA = +25C, IF = 60 mA -7.0 dBm peak TA = -40C to 85C, IF = 60 mA 200 m Fiber Cable NA = 0.37 PT200 0.0 dBm peak TA = +25C, IF = 60 mA 1.0 dBm peak TA = -40C to 85C, IF = 60 mA -17.5 -12.0 -10.5 -13.0 -6.0 -3.6 -7.0 Conditions Reference Notes 5, 6, 9 Figure 10 14x2Z/14x4Z/14x5Z Dynamic Characteristics Parameter Symbol Min. Typ. [2] Max. 6.5 Unit Rise Time, Fall Time (10% to 90%) tr, tf 4.0 Rise Time, Fall Time (10% to 90%) tr, tf 3.0 ns Pulse Width Distortion PWD 0.5 ns Conditions ns IF = 60 mA No pre-bias Figure 11 IF = 10 to 100 mA Reference Note 7 Figure 12 Figure 12 Notes: 1. For IFPK > 100 mA, the time duration should not exceed 2 ns. 2. Typical data at TA = +25C. 3. Thermal resistance is measured with the transmitter coupled to a connector assembly and mounted on a printed circuit board. 4. D is measured at the plane of the fiber face and defines a diameter where the optical power density is within 10 dB of the maximum. 5. PT is measured with a large area detector at the end of 1 meter of mode stripped cable, with an ST precision ceramic ferrule (MILSTD- 83522/13) for HFBR141xZ, and with an SMA 905 precision ceramic ferrule for HFBR-140xZ. 6. When changing mW to dBm, the optical power is referenced to 1 mW. Optical Power P(dBm) = 10log (P(mW) / 1 mW) 7. Pre-bias is recommended if signal rate >10 MBaud, see recommended drive circuit in Figure 11. 8. Pins 2, 6, and 7 are welded to the anode header connection to minimize the thermal resistance from junction to ambient. To further reduce the thermal resistance, the anode trace should be made as large as is consistent with good RF circuit design. 9. Fiber NA is measured at the end of 2 meters of mode stripped fiber, using the far-field pattern. NA is defined as the sine of the half angle, determined at 5% of the peak intensity point. When using other manufacturer's fiber cable, results will vary due to differing NA values and specification methods. 10.Only valid for HFBR-141xPxZ (Protection improved option). Broadcom - 16 - HFBR-14xxZ and HFBR-24xxZ Series Data Sheet All HFBR-14XXZ LED transmitters are classified as IEC 825-1 Accessible Emission Limit (AEL) Class 1 based upon the current proposed draft scheduled to go in to effect on January 1, 1997. AEL Class 1 LED devices are considered eye safe. Contact your Broadcom Ltd. sales representative for more information. CAUTION: The small junction sizes inherent to the design of these components increase the components' susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. 2 90 1.8 70 60 50 40 30 85C 25C - 40C 20 10 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2 P(If) -P(60mA) - RELATIVE POWER RATIO 100 80 FORWARD CURRENT (mA) Figure 10: Normalized Typical Transmitter Output vs. Forward Current 3.0 1.6 2.0 1.4 1.2 0.8 0 1 -1.0 0.8 0.6 0.4 -4.0 0.2 -7.0 0 2.1 2.2 FORWARD VOLTAGE (V) Broadcom - 17 - 0 10 20 30 40 50 60 70 FORWARD CURRENT (mA) 80 90 100 P(If) - P(60 mA) RELATIVE POWER RATIO (dB) Figure 9: Typical Forward Voltage and Current Characteristics HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Recommended Transmitter Driver Circuitry Transmitter R1 R2 R3 C3 HFBR-14x2Z/x4Z/x5Z 33 33 270 75 pF Figure 11: Recommended Drive Circuit 2 12 Data 13 IC1D 11 4 5 9 10 IC1B 6 10 F 100 nF GND GND HFBR-14x2Z/x4Z/x5Z 2 AN2 6 AN6 7 AN7 3 CAT Tx LL C2 8 5 4 1 IC1A 3 C1 R2 R1 R3 1 C3 TXVCC = 5.0V IC1C 8 GND GND 74ACT[Q]00MTC Note: The component values shown in the table create a typical driver current of 60mA (peak). An individual check of the optical output signal quality of the used optic transmitter is recommended during the circuit design. Figure 12: Test Circuit for Measuring tr, tf Agilent 81130A PULSE/PATTERN GENERATOR GND OUT SMA measuring cable (50) O/E CONVERTER Silicon PIN photo diode (50 terminated) Broadcom - 18 - HIGH SPEED OSCILLOSCOPE (50 terminated) HFBR-14xxZ and HFBR-24xxZ Series Data Sheet HFBR-24x2Z Low-Cost 5 MBaud Receiver Description The HFBR-24x2Z fiber optic receiver is designed to operate with the Broadcom Ltd. HFBR-14xxZ fiber optic transmitter and 50/125 m, 62.5/125 m, 100/140 m, and 200 m Plastic-Clad Silica (PCS) fiber optic cable. Consistent coupling into the receiver is assured by the lensed optical system (Figure 1). Response does not vary with fiber size 0.100 m. The HFBR-24x2Z receiver incorporates an integrated photo IC containing a photodetector and dc amplifier driving an opencollector Schottky output transistor. The HFBR-24x2Z is designed for direct interfacing to popular logic families. The absence of an internal pull-up resistor allows the open-collector output to be used with logic families such as CMOS requiring voltage excursions much higher than VCC. Both the open-collector Data output Pin 6 and VCC Pin 2 are referenced to Com Pins 3 and 7. The Data output allows busing, strobing and wired OR circuit configurations. The transmitter is designed to operate from a single +5V supply. It is essential that a bypass capacitor (100 nF ceramic) be connected from Pin 2 (VCC) to Pin 3 (circuit common) of the receiver. Housed Product 2 6 7& 3 4 3 2 1 V cc DATA COMMON 5 6 7 8 BOTTOM VIEW PI N 11 2 32 41 51 6 72 81 FUNCTION NC VCC (5V) COMMON NC NC DATA COMMON NC PIN 1 INDICATOR NOTES: 1. PINS 1, 4, 5, AND 8 ARE ELECTRICALLY CONNECTED. 2. PINS 3 AND 7 ARE ELECTRICALLY CONNECTED TO THE HEADER. Absolute Maximum Ratings Symbol Min. Max. Unit Storage Temperature Parameter TS -55 +85 C Operating Temperature TA -40 +85 C +260 10 C sec +7.0 V 25 mA +18.0 V PO AV 40 mW N 5 Lead Soldering Cycle Temp Time Supply Voltage VCC Output Current IO Output Voltage VO Output Collector Power Dissipation Fan Out (TTL) -0.5 -0.5 Notes: 1. 2.0 mm from where leads enter case. 2. 8 mA load (5 x 1.6 mA), RL = 560. Broadcom - 19 - Reference Note 1 Note 2 HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Electrical/Optical Characteristics -40C to + 85C unless otherwise specified. Fiber sizes with core diameter 100 m and N/A 0.35, 4.75V VCC 5.25V. Typ. [3] Max. Unit IOH 5 250 A VO = 18, PR < -40 dBm Low Level Output Voltage VOL 0.4 0.5 V IO = 8 m, PR > -24 dBm High Level Supply Current ICCH 3.5 6.3 mA VCC = 5.25 V, PR < -40 dBm Low Level Supply Current ICCL 6.2 10 mA VCC = 5.25 V, PR > -24 dBm Equivalent NA NA 0.50 D 400 Parameter High Level Output Current Optical Port Diameter Symbol Min. Conditions m Reference Note 4 Dynamic Characteristics -40C to + 85C unless otherwise specified; 4.75V VCC 5.25V; BER 10-9 Parameter Symbol Peak Optical Input Power Logic Level HIGH PRH Peak Optical Input Power Logic Level LOW PRL Min. Typ. [3] Max. Unit Conditions Reference -40 0.1 dBm peak P = 820 nm W peak Note 5 -25.4 2.9 -9.2 120 dBm peak TA = +25C, W peak IOL = 8 mA Note 5 -24.0 4.0 -10.0 100 dBm peak TA = -40C to +85C, W peak IOL = 8 mA Propagation Delay LOW to HIGH tPLHR 65 ns Propagation Delay HIGH to LOW tPHLR 49 ns TA = +25C, PR = -21 dBm, Data Rate = 5 MBaud Note 6 Notes: 1. 2. 3. 4. 2.0 mm from where leads enter case. 8 mA load (5 x 1.6 mA), RL = 560. Typical data at TA = +25C, VCC = 5.0VDC. D is the effective diameter of the detector image on the plane of the fiber face. The numerical value is the product of the actual detector diameter and the lens magnification. 5. Measured at the end of 100/140 m fiber optic cable with large area detector. 6. Propagation delay through the system is the result of several sequentially-occurring phenomena. Consequently it is a combination of data-rate-limiting effects and of transmission-time effects. Because of this, the data-rate limit of the system must be described in terms of time differentials between delays imposed on falling and rising edges. As the cable length is increased, the propagation delays increase at 5 ns per meter of length. Data rate, as limited by pulse width distortion, is not affected by increasing cable length if the optical power level at the receiver is maintained. CAUTION: The small junction sizes inherent to the design of these components increase the components' susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. Broadcom - 20 - HFBR-14xxZ and HFBR-24xxZ Series Data Sheet HFBR-24x6Z Low-Cost 125 MHz Receiver Description The HFBR-24x6Z fiber optic receiver is designed to operate with the Broadcom Ltd. HFBR-14xxZ fiber optic transmitters and 50/125 m, 62.5/125 m, 100/140 m, and 200 m Plastic-Clad Silica (PCS) fiber optic cable. Consistent coupling into the receiver is assured by the lensed optical system (Figure 1). Response does not vary with fiber size for core diameters of 100 m or less. The receiver output is an analog signal which allows follow-on circuitry to be optimized for a variety of distance/data rate requirements. Low-cost external components can be used to convert the analog output to logic compatible signal levels for various data formats and data rates up to 175 MBaud. This distance/data rate trade-off results in increased optical power budget at lower data rates which can be used for additional distance or splices. The HFBR-24x6Z receiver contains a PIN photodiode and low noise transimpedance preamplifier integrated circuit. The HFBR24x6Z receives an optical signal and converts it to an analog voltage. The output is a buffered emitter follower. Because the signal amplitude from the HFBR-24x6Z receiver is much larger than from a simple PIN photodiode, it is less susceptible to EMI, especially at high signaling rates. For very noisy environments, the conductive or metal port option is recommended. A receiver dynamic range of 23 dB over temperature is achievable, assuming a Bit Error Rate (BER) of 10-9. The frequency response is typically DC to 125 MHz. Although the HFBR-24x6Z is an analog receiver, it is compatible with digital systems. The recommended ac coupled receiver circuit is shown in Figure 14. A 10 resistor must be connected between pin 6 and the power supply, and a 100 nF ceramic bypass capacitor must be connected between the power supply and ground. In addition, pin 6 should be filtered to protect the receiver from noisy host systems. Refer to AN 1065 for details. Housed Product Figure 13: Simplified Schematic Diagram 6 BIAS & FILTER CIRCUITS V CC 6 POSITIVE SUPPLY 2 V cc ANALOG SIGNAL 3& 7 V EE 300 pF 4 3 2 1 2 V OUT ANALOG SIGNAL BOTTOM VIEW 5.0 mA 3, 7 V EE NEGATIVE SUPPLY PI N 11 2 32 41 51 6 72 81 FUNCTION NC SIGNAL V EE NC NC V CC V EE NC 5 6 7 8 PIN 1 INDICATOR NOTES: 1. PINS 1, 4, 5, AND 8 ARE ISOLATED FROM THE INTERNAL CIRCUITRY, BUT ARE CONNECTED TO EACH OTHER. 2. PINS 3 AND 7 ARE ELECTRICALLY CONNECTED TO THE HEADER. CAUTION: The small junction sizes inherent to the design of these components increase the components' susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. Broadcom - 21 - HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Absolute Maximum Ratings Symbol Min. Max. Unit Storage Temperature Parameter TS -55 +85 C Operating Temperature TA -40 +85 C +260 10 C sec Lead Soldering Cycle Temp Time Supply Voltage VCC Output Current IO Signal Pin Voltage -0.5 VSIG -0.5 +6.0 V 25 mA VCC V Reference Note 1 Electrical/Optical Characteristics -40C to +85C; 4.75V Supply Voltage 5.25 V, RLOAD = 511, Fiber sizes with core diameter 100 m, and NA 0.35 unless otherwise specified. Parameter Responsivity Symbol Min. Typ. [2] Max. Unit RP 5.3 7 9.6 mV/W TA = +25C at 820 nm, 50 MHz 11.5 mV/W TA= -40C to +85C at 820nm, 50MHz 0.59 mV Bandwidth filtered at 75 MHz PR = 0 W 0.70 mV Unfiltered bandwidth PR = 0 W -41.4 0.065 dBm W Bandwidth filtered at 75 MHz 4.5 RMS Output Noise Voltage VNO Equivalent Input Optical Noise Power (RMS) PN Optical Input Power (Overdrive) PR Output Impedance ZO dc Output Voltage VO dc 0.40 -43.0 0.050 -7.6 175 dBm peak TA = +25C W peak -8.2 150 dBm peak TA = -40C to +85C W peak 30 Test Frequency = 50 MHz PR = 0 W Vcc - 3.1 Vcc - 2.4 V Power Supply Current IEE 9 15 mA Equivalent NA NA 0.35 D 324 Equivalent Diameter Vcc - 4.2 Conditions m Reference Note 3, 4 Figure 18 Note 5 Figure 15 Note 6 Figure 16 RLOAD = 510 Note 7 CAUTION: The small junction sizes inherent to the design of these components increase the components' susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. Broadcom - 22 - HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Dynamic Characteristics -40C to +85C; 4.75V Supply Voltage 5.25V; RLOAD = 511, CLOAD = 5 pF unless otherwise specified Parameter Symbol Min. Typ. [2] Max. Unit Conditions Reference Rise/Fall Time 10% to 90% tr, tf 3.3 6.3 ns PR = 100 W peak Figure 17 Pulse Width Distortion PWD 0.4 2.5 ns PR = 150 W peak Note 8, Figure 16 2 % PR = 5 W peak, tr = 1.5 ns Note 9 125 MHz -3 dB Electrical 0.41 Hz x s Overshoot Bandwidth (Electrical) BW Bandwidth - Rise Time Product Note 10 Notes: 1. 2. 3. 4. 5. 6. 7. 2.0 mm from where leads enter case. Typical specifications are for operation at TA = +25C and VCC = +5V DC. For 200 m PCS fibers, typical responsivity will be 6 mV/mW. Other parameters will change as well. Pin #2 should be ac coupled to a load 510. Load capacitance must be less than 5 pF. Measured with a 3 pole Bessel filter with a 75 MHz, -3 dB bandwidth. Overdrive is defined at PWD = 2.5 ns. D is the effective diameter of the detector image on the plane of the fiber face. The numerical value is the product of the actual detector diameter and the lens magnification. 8. Measured with a 10 ns pulse width, 50% duty cycle, at the 50% amplitude point of the waveform. 9. Percent overshoot is defined as: (V ) - V 100% x 100% V 100% PK 10. The conversion factor for the rise time to bandwidth is 0.41 since the HFBR-24x6Z has a second order bandwidth limiting characteristic. Figure 14: Recommended AC-Coupled Receiver Circuit 0.1 F +5V 10 6 30 pF 2 3&7 POST AMP LOGIC OUTPUT R LOADS 500 MIN. CAUTION: The small junction sizes inherent to the design of these components increase the components' susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be taken in handling and assembly of these components to prevent damage and/or degradation which may be induced by ESD. Broadcom - 23 - HFBR-14xxZ and HFBR-24xxZ Series Data Sheet Figure 15: Typical Spectral Noise Density vs. Frequency 150 3.0 125 2.5 PWD - PULSE WIDTH DISTORTION - ns Z SPECTRAL NOISE DENSITY - nV/ H Figure 16: Typical Pulse Width Distortion vs. Peak Input Power 100 75 50 25 0 0 50 100 150 200 250 2.0 1.5 1.0 0.5 0 300 0 FREQUENCY - MHz 30 40 50 60 70 80 Figure 18: Typical Receiver Spectral Response Normalized to 820 nm 6.0 1.25 5.0 1.00 NORMALIZED RESPONSE t r, t f - RESPONSE TIME - ns 20 P R - INPUT OPTICAL POWER - W Figure 17: Typical Rise and Fall Times vs. Temperature 4.0 tf 3.0 tr 2.0 1.0 10 0.75 0.50 0.25 -60 -40 -20 0 20 40 60 80 0 400 100 480 560 640 720 800 - WAVELENGTH - nm TEMPERATURE - C Broadcom - 24 - 880 960 1040 For product information and a complete list of distributors, please go to our web site: www.broadcom.com. Broadcom, the pulse logo, Connecting everything, Avago Technologies, Avago, the A logo, and R2Coupler are among the trademarks of Broadcom and/or its affiliates in the United States, certain other countries and/or the EU. Broadcom Proprietary and Confidential. Copyright (c) 2017-2019 Broadcom. All Rights Reserved. The term "Broadcom" refers to Broadcom Inc. and/or its subsidiaries. Broadcom reserves the right to make changes without further notice to any products or data herein to improve reliability, function, or design. Information furnished by Broadcom is believed to be accurate and reliable. However, Broadcom does not assume any liability arising out of the application or use of this information, nor the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. AV02-0176EN - February 15, 2019