HFBR-7934WZ/EWZ/HWZ/EHWZ Four-Channel Pluggable Parallel Fiber Optic Transceiver Data Sheet Description Features The HFBR-7934WZ transceiver is a high performance fiber optic module for parallel optical data communication applications. It incorporates 8 independent data channels (4 for transmit and 4 for receive) operating from 1 to 3.125 Gb/s 8B/10B encoded per channel providing a cost effective solution for very short reach applications requiring 12.5 Gb/s aggregate bandwidth. The module is designed to operate on multimode fiber systems at a nominal wavelength of 850 nm. It incorporates high performance, highly reliable, short wavelength optical devices coupled with proven circuit technology to provide long life and consistent service. * RoHS Compliant * Four Transmit and Four Receive Channels; 1 to 3.125 Gb/s 8B/10B encoded per channel * Compatible with SONET scrambled and 8B10B encoded data formats * 850 nm VCSEL array source * Conforms to "POP4" Four-Channel Pluggable Optical Transceiver Multisource Agreement * 50/125 m multimode fiber operation * Distance up to 150 m with 500 MHz.km fiber at 3.125 Gb/s * Distance up to 350 m with 2000 MHz.km fiber at 3.125 Gb/s * Pluggable package * Outputs (Tx & Rx) are squelched for loss of signal * Control I/O is compatible with LVTTL and LVCMOS * Standard MTP(R) MPO ribbon fiber connector interface * Integrated heat sink * Manufactured in an ISO 9002 certified facility * Rx Signal Detect The HFBR-7934WZ transceiver module incorporates a 4 channel VCSEL (Vertical Cavity Surface Emitting Laser) array together with a custom 4 channel laser driver integrated circuit providing IEC-825 and CDRH Class 1M laser eye safety. It also contains a 4 channel PIN photodiode array coupled with a custom preamplifier / post amplifier integrated circuit. Operating on 3.3 V power supply this module provides LVTTL/LVCMOS control interfaces and CML compatible high speed data lines which simplify external circuitry. The transceiver is housed in MTP(R)/MPO receptacled package with integral finned heatsink. Electrical connections to the device are achieved by means of a pluggable 10x10 connector array. Applications * Telecom and Datacom Switch/Router Rack-to-Rack Connections * Computer Cluster Interconnects 4 Channels DIN Ch 0 - 3 + Input Stage Driver POINT FOR TAKING MODULE TEMPERATURE VCSEL Array e er Cod umtb BaPrartgN en A il DIN Ch 0 - 3 - DOUT Ch 0 - 3 + Control Vcc_RX GND_RX 4 Channels Driver Vcc_TX GND_TX Input Stage DOUT Ch 0 - 3 - Figure 1. Block Diagram (dimensions in mm) PIN Array Figure 2. Case temperature measurement Module Case Temperature Rise Above Ambient ( C) TX_DIS TX_EN TX_FAULT* TX_RESET* SD 25 20 15 10 5 0 0 0.5 1 Air Velocity (m/s) 1.5 Figure 3. Ambient air temperature and air flow for TC = +80 C 2 Package Dimensions Notes: 1. Module mass approximately 20 grams. Figure 4A - HFBR-7934WZ Package dimensions (dimensions in mm) Figure 4B - HFBR-7934EWZ Package dimensions (dimensions in mm) Figure 5A - HFBR-7934HWZ Package Dimensions (dimensions in mm) Figure 5B - HFBR-7934EHWZ Package Dimensions (dimensions in mm) 2 x 2.54 MIN. PAD KEEP-OUT 0.1 A B-C 2 x 1.7 0.05 HOLES 0.1 A B-C 3 x 4.17 MIN. PAD KEEP-OUT 6.73 0.1 A B-C B 3 x 2.69 0.05 HOLES FOR #2 SCREW 0.1 A B-C A SYM. 13.72 18 REF. 100 PIN FCI MEG-Array(R) RECEPTACLE CONNECTORS 18.42 MIN. C SYM. 9 x 1.27 TOT = 11.43 END OF MODULE FRONT (10 x 10 =) 100 x 0.58 0.05 PADS 0.05 A B-C 6.73 50 KEEP-OUT AREA FOR MPO CONNECTOR 9 x 1.27 TOT = 11.43 1.89 REF. 30.23 8.95 REF. PCB TOP VIEW NOTE: The host electrical connector attached to the PCB must be a 100-position FCI Meg-Array(R) plug (FCI PN: 84512-102) or equivalent. Figure 6 - Package Board Footprint (dimensions in mm) 0.50 max 19.02 min PCB 15.70 0.25 Figure 7 - Host Frontplate Layout (dimensions in mm) 3.60 0.2 13.40 0.2 Front Panel PCB 35.31+/- 0.20 Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause catastrophic damage to the device. Limits apply to each parameter in isolation, all other parameters having values within the recommended operating conditions. It should not be assumed that limiting values of more than one parameter can be applied to the product at the same time. Exposure to the absolute maximum ratings for extended periods can adversely affect device reliability. Parameter Symbol Minimum Storage Temperature TS Supply Voltage VCC Data/Control Signal Input Voltage VI Transmitter Differential Input Voltage Output Current (dc) Relative Humidity (Non Condensing) RH Typical Maximum Unit -40 +100 C -0.5 4.6 V -0.5 VCC + 0.5 V | VD | 2 V ID 25 mA 95 % 5 Reference 1 Recommended Operating Conditions Recommended Operating Conditions specify conditions for which the optical and electrical characteristics hold. Optical and electrical characteristics are not specified for operation beyond the Recommended Operating Conditions, reliability is not implied and damage to the device may occur for such operation over an extended time period. Parameter Symbol Minimum Case Temperature TC 0 Supply Voltage VCC 3.135 Signaling Rate/Channel Typical Maximum Unit Reference +80 C 2, Figures 2, 3.465 V Figure 8 1 3.125 GBd 6 175 1600 mVP-P 3, Figures 11,12 3.3 Data Input Differential Peak-to-PeakVoltage Swing DVDINP-P Data Input Rise & Fall Time (20-80%) tr, tf 160 ps Control Input Voltage High VIH 2.0 VCC V Control Input Voltage Low VIL VEE 0.8 V Power Supply Noise NP 200 mVP-P 4, Figure 8 Data I/O Coupling Capacitors CAC 0.1 F 5, Figure 9 Receiver Differential Data Output Load RDL 100 W Figure 9 Transmitter Input Electrical Deterministic Jitter DJ 0.15 48 UI ps Transmitter Input Electrical Total Jitter TJ 0.33 106 UI ps Notes: 1. This is the maximum voltage that can be applied across the Transmitter Differential Data Inputs without damaging the input circuit. 2. Case Temperature is measured as indicated in Figure 2. 3. Data inputs are CML compatible. Coupling capacitors are required to block dc. DVDIN p-p = DVDINH - DVDINL, where DVDINH = High State Differential Data Input Voltage and DVDINL = Low State Differential Data Input Voltage. 4. Power Supply Noise is defined at the supply side of the recommended filter for all VCC supplies over the frequency range from 500 Hz to 2700 MHz with the recommended power supply filter in place. 5. For data patterns with restricted run lengths, e.g. 8B10B encoded data, smaller value capacitors may provide acceptable results. 6. 8B/10B encoded Transmitter Electrical Characteristics (Over recommended operating conditions: Tc= 0C to +80C, Vcc=3.3V + 5%) Parameter Symbol Minimum Typical Maximum Unit Differential Input Impedance Zin 80 100 120 W 1, Figure 9 FAULT* Assert time TOFF 100 s Figure 13 RESET* Assert time TOFF 7.5 s Figure 14 RESET* De-assert time TON 18 ms Figure 14 Transmit Enable (TX_EN) Assert time TON 18 ms Figure 15 Transmit Enable (TX_EN) De-assert time TOFF 7.5 s Figure 15 Transmit Disable (TX_DIS) Assert time TOFF 7.5 s Figure 15 Transmit Disable (TX_DIS) De-assert time TON 18 ms Figure 15 ms Figure 17 Power-On Initiation Time Control I/Os TX _DIS, TX_EN,TX_ FAULT*,TX_RESET* 21 Reference Input Current High | IIH | 0.5 mA 2.0 V < VIH < VCC Input Current Low | IIL | 0.5 mA VEE < VIH < 0.8 V Output Voltage Low VOL VEE 0.4 V IOL = 4.0 mA Output Voltage High VOH 2.4 VCC V IOH = -0.5 mA Transmitter Optical Characteristics (Over recommended operating conditions: Tc= 0C to +80C, Vcc=3.3V + 5%) Parameter Symbol Minimum Optical Modulation Amplitude OMA -7.22 Center Wavelength lC 830 Spectral Width - rms s Rise, Fall Time tr, tf Inter-channel Skew Typical Maximum Unit Reference dBm 850 860 nm 0.85 nm rms 60 100 ps 2 50 100 ps 3 Relative Intensity Noise OMA RIN12OMA -119.5 dB/Hz Jitter Contribution Deterministic DJ 60 ps 4 Total TJ 120 ps 5 POUT -2.0 dBm Avg. 6 Output Optical Power, 50/125 um, Fiber NA =0.2 Notes: 1. Differential impedance is measured between Din+ and Din- over the range 4 MHz to 2 GHz. 2. These are unfiltered 20% - 80% values measured with a 550 MBd 101010 pattern. 3. Inter-channel Skew is defined for the condition of equal amplitude, zero ps skew input signals. 4. Deterministic Jitter (DJ) is defined as the combination of Duty Cycle Distortion (Pulse-Width Distortion) and Data Dependent Jitter. Deterministic Jitter is measured at the 50% signal threshold level using a 3.125 GBd Pseudo Random Bit Sequence of length 27 -1 (PBRS7), or equivalent, test pattern with zero skew between the differential data input signals. 5. Total Jitter (TJ) includes Deterministic Jitter and Random Jitter (RJ). Total Jitter is specified at a BER of 10-12 for the same 3.125 GBd test pattern as for DJ and is measured with all channels operating. 6. The specified optical output power, measured at the output of a 2meter test cable, will be compliant with IEC 60825-1 Amendment 2, Class 1M Accessible Emission Limits, AEL Regulatory Compliance section. Receiver Electrical Characteristics (Over recommended operating conditions: Tc= 0C to +80C, Vcc=3.3V + 5%) Parameter Symbol Differential Output Impedance ZOUT Data Output Differential Peak-to-Peak Voltage Swing DVDOUTP-P Minimum Typical Maximum Unit 100 500 Inter-channel Skew Reference W 1, Figure 9 650 800 mVP-P 2, Figure 10 50 100 ps 3 120 150 ps 4 Data Output Rise, Fall Time tr, tf Control I/O Signal Detect LVTTL & LVCMOS Compatible Output Voltage Low VOL VEE 0.4 V IOL = 4.0 mA Output Voltage High VOH 2.4 VCC V IOH = -0.5 mA Assert Time (OFF-to-ON) tSDA 50 s 5 De-assert Time (ON-to-OFF) tSDD 50 s 6 Optical Link Output Deterministic Jitter DJ 0.4 128 UI ps 7 Optical Link Output Total Jitter TJ 0.7 225 UI ps 7 UI ps 7 Receiver Electrical Output Eye Opening 0.3 96 Receiver Optical Characteristics (Over recommended operating conditions: Tc= 0C to +80C, Vcc=3.3V + 5%) Parameter Symbol Minimum Input OMA - Sensitivity PINMIN -14.22 Input Optical Power - Saturation PIN MAX -2.0 Operating Center Wavelength lC 830 Return Loss Signal Detect Typical Maximum Unit dBm OMA Reference 8 dBm avg. 860 12 -21 -16 nm dB 9 dBm 10 Asserted PA Deasserted PD -30 -26 dBm Hysteresis PA - PD 0.5 1.0 dB Contributed Deterministic Jitter DJ 0.063 20 UI ps Contributed Total Jitter TJ 0.214 68 UI ps Notes: 1. Measured over the range 4 MHz to 2 GHz. 2. DVDoutP-P = DVDoutH - DVDoutL, where DVDoutH = High State Differential Data Output Voltage and DVDoutL = Low State Differential Data Output Voltage. DVDoutH and DVDoutL = VDout+ - VDout-, measured with a 100 W differential load connected with the recommended coupling capacitors and with a 2500 MBd, 101010 pattern. 3. Inter-channel Skew is defined for the condition of equal amplitude, zero ps skew input signals. 4. Rise and Fall Times are measured between the 20% and 80% levels using a 550 MHd square wave signal. 5. The Signal Detect output will change from logic "0" (Low) to "1" (High) within the specified assert time for a step transition in optical input power from the deasserted condition to the specified asserted optical power level. 6. The Signal Detect output will change from logic "1" (High) to "0" (Low) within the specified de-assert time for a step transition in optical input power from the specified asserted optical power level to the deasserted condition. 7. Assumes a link where the transmitter is an HFBR-7934WZ or equivalent operating per the recommended operating conditions and with maximum cable links. 8. Sensitivity is defined as the maximum Input OMA necessary to produce a BER < 10-12 at the center of the signal period. For this parameter, input OMA is equivalent to that provided by an ideal source, i.e. one with RIN and switching attributes that do not degrade the sensitivity measurement. All channels not under test are operating receiving data with an average input OMA of up to 6 dB above PIN MIN. Sensitivity for signal rates from 1 to 3.125 GBd is defined for 8B/10B encoded data. 9. Return loss is defined as the ratio, in dB, of the received optical power to the optical power reflected back down the fiber. 10. Signal Detect assertion requires all optical inputs to exhibit a minimum OMA of -16dBm. All channels not under test are operating with PRBS7 patterns, asynchronous with the channel under test, and average input power of up to 6 dB above the specified PIN MIN. General/Control Electrical Characteristics (Over recommended operating conditions: Tc= 0C to +80C, Vcc=3.3V + 5%) Parameter Symbol Typical Maximum Unit Supply Current ICCT Minimum 300 420 mA Power Dissipation PDIST 1.0 1.46 W Reference Regulatory Compliance Immunity The overall equipment design will determine the certification level. The module performance is offered as a figure of merit to assist the designer in considering their use in equipment designs. Equipment utilizing these modules will be subject to radio frequency electromagnetic fields in some environments. These modules have good immunity to such fields due to their shielded design. Electrostatic Discharge (ESD) Eye Safety There are two design cases in which immunity to ESD damage is important. These 850 nm VCSEL-based transceiver modules provide eye safety by design. The first case is during handling of the module prior to mounting it on the circuit board. It is important to use normal ESD handling precautions for ESD sensitive devices. These precautions include using grounded wrist straps, workbenches and floor mats in ESD controlled areas. The module performance has been shown to provide adequate performance in typical industry production environments. The HFBR-7934WZ has been registered with CDRH and certified by TUV as a Class 1M device under Amendment 2 of IEC 60825-1. See the Regulatory Compliannce Table for further detail. If Class 1M exposure is possible, a safety-warning label should be placed on the product stating the following: The second case to consider is static discharges to the exterior of the equipment chassis containing the module parts. To the extent that the MT-based connector receptacle is exposed to the outside of the equipment chassis it may be subject to whatever system-level ESD test criteria that the equipment is intended to meet. The module performance exceeds typical industry equipment requirements of today. Electromagnetic Interference (EMI) Most equipment designs using these high-speed modules from Avago Technologies will be required to meet the requirements of FCC in the United States, CENELEC EN55022 (CISPR 22) in Europe and VCCI in Japan. These modules, with their shielded design, perform to the limits listed in Table 1 to assist the designer in the management of the overall equipment EMI performance. LASER RADIATION DO NOT VIEW DIRECTLY WITH OPTICAL INSTRUMENTS. CLASS 1M LASER PRODUCT MTP(R)(MPO) Optics Cleaning Statement The optical port has recessed optics that are visible through the nose of the port. The port plug provided should be installed whenever a fiber cable is not connected. This ensures the optics remain clean and no cleaning should be necessary. In the event of the optics being contaminated, forced nitrogen or dry clean air at less than 20 psi is the recommended cleaning agent. The features of the optical port and guide pins preclude the use of any solid instrument. Liquids are not advised due to potential damage. Application of wave soldering, reflow soldering and/or aqueous wash processes with the HFBR-7934WZ modules device on board is not recommended as damage may occur. Normal handling precautions for electrostatic sensitive devices should be taken (see ESD section). Table 1 - Regulatory Compliance Feature Test Method Performance Electrostatic Discharge JEDEC Human Body (HBM) (ESD to the Electrical Pads) (JESD22-A114-B) JEDEC Machine Model (MM) Module > 1000 V Electrostatic Discharge (ESD to the Connector Receptacle) Variation of IEC 61000-4-2 Typically withstand at least 6 kV (module biased) without damage when the connector receptacle is contacted by a Human Body Model probe Electromagnetic Interference (EMI) FCC Class B CENELEC EN55022 Class B (CISPR 22A) VCCI Class 1 Typically pass with 5 dB margin. (See Notes 24 and 25) Immunity Variation of IEC 61000-4-3 Typically show no measurable effect from a 10 V/m field swept from 80 MHz to 1 GHz applied to the module without a chassis enclosure. Laser Eye Safety and Equipment Type Testing IEC 60825-1 Amendment 2 CFR 21 Section 1040 IEC AEL & US FDA CDRH Class 1M CDRH Accession Number: 9720151-22 TUV Bauart License: E2171095.04 Component Recognition Underwriters Laboratories and Canadian Standards Association Joint Component Recognition for Information Technology Equipment Including Electrical Business Equipment. UL File Number: E173874 RoHS Compliance Module > 50 V Less than 1000 ppm of cadmium, lead, mercury, hexavalent chromium,polybrominated biphenyls, and polybrominated biphenyl ethers. Notes: 24. EMI performance only refers to shielded version (HFBR-7934EWZ and HFBR-7934HEWZ). 25. EMI performance could be improved by connecting the following pads to electrical ground : C9, G7 and H9. 10 4+4 Transceiver Module Pad Assignment - HFBR-7934WZ K F E D C B A VEE RX DOUT03+ VEE RX VEE RX VEE TX VEE TX DIN03- VEE TX DIN00+ 2 DOUT00+ VEE RX DOUT03- VEE RX VEE RX VEE TX VEE TX DIN03+ VEE TX DIN00- 3 VEE RX VEE RX VEE RX VEE RX VEE RX VEE TX VEE TX VEE TX VEE TX VEE TX 4 DOUT1+ VEE RX DOUT02- DNC DNC DNC DNC DIN02+ VEE TX DIN01- 5 DOUT1- VEE RX DOUT02+ DNC DNC DNC DNC DIN02- VEE TX DIN01+ 6 VEE RX VEE RX DNC DNC DNC DNC VEE TX VEE TX VEE TX DNC DNC DNC DNC VCC TX VCC TX VCC TX 1 7 DOUT00- J H VEE RX VCCB RX VCCB RX VCCB RX G 8 DNC Reserved Reserved Reserved TBD MSA TBD MSA TBD MSA DNC TX_DIS TX_EN DNC DNC DNC 9 DNC Reserved Reserved TBD MSA TBD MSA SD DNC RESET* FAULT* DNC DNC DNC DNC DNC DNC DNC VEE TX VCC TX VCC TX 10 VCCA RX VCCA RX VEE RX TOP VIEW (PCB LAYOUT) (10 x 10 ARRAY) 11 Table 2. Transceiver Module Pad Description Symbol Functional Description Din Ch 0 - 3 +/through Din Ch 0 - 3 +/- Transmitter differential data inputs for channels 0 through 3: Data inputs are CML compatible. TX_DIS Transmitter Disable: LVCMOS Input (Internal pull down). Control input used to turn off the transmitter optical outputs. High Active. VCSEL array is off when High. Normal operation is enabled when Low. TX_EN Transmitter Enable: LVCMOS Input (Internal pull up). Control input used to enable the transmitter optical outputs. High Active. VCSEL array is off when Low. Normal operation is enabled when High. TX_FAULT* Transmitter Fault: LVCMOS Output. Transmitter status output indicating an eye-safety over-current condition for any VCSEL, an out of temperature range condition and/or a calibration data corruption detection. High output state indicates normal operation. Low output state indicates the fault condition. An asserted FAULT* condition disables the VCSEL array and is cleared by TX_RESET*. TX_RESET* Transmitter Reset: LVCMOS Input (Internal pull up). Control input used to reset the transmitter logic functions. Active Low. VCSEL array is off when Low. Normal operation is enabled when High. VEE_TX Transmitter signal common. All transmitter voltages are referenced to this potential unless otherwise stated. Directly connect these pads to the PC board transmitter ground plane. VCC_TX Transmitter power supply. Dout Ch 0 - 3 +/through Dout Ch 0 - 3 +/- Receiver differential data outputs for channels 0 through 3: Data outputs are CML compatible. Data outputs are squelched for de-asserted Signal Detect. SD Receiver Signal Detect: LVCMOS Output. Receiver status output indicating valid signal in all channels. High output state (asserted) indicates valid optical inputs to each and every channel. Low output state (de-asserted) indicates loss of signal at any of the monitored receiver inputs. All channels are monitored. DNC Do NOT Connect. Do not connect to any electrical potential. VEE_RX Receiver signal common. All receiver voltages are referenced to this potential unless otherwise stated. Directly connect these pads to the PC board receiver ground plane. VCCA_RX Pin preamplifier power supply rail. VCCB_RX Receiver quantizer power supply rail. VCCA_RX and VCCB_RX can be connected to the same power supply. However, to insure maximum receiver sensitivity and minimize the impact of noise from the power supply, it is recommended to keep the power supplies separate and to use the recommended power supply filtering network on VCCA_RX (see Figure 8). Module Case 12 Transceiver Case Common. Transceiver Case Common incorporates all exposed conductive surfaces and is electrically isolated from Transmitter Signal Common and Receiver Signal Common. HFBR-7934WZ R5 100 W 0603 R6 1.0 kW 0603 Vcc Tx L6 6.8 nH 0805 L5 1 H 2220 VCC Vcc Tx Vcc Tx Vcc Tx C12 0.1 F 0603 C11 0.1 F 0603 C10 10 F 1210 R4 1.0 kW 0603 C9 10 F 1210 R3 100 W0603 VccA Rx L4 6.8 nH 0805 L3 1 H 2220 VCC VccA Rx C8 0.1 F 0603 C7 0.1 F 0603 C6 10 F 1210 C5 10 F 1210 R1 100 W 0603 R2 1.0 kW 0603 VccB Rx L2 6.8 nH 0805 L1 1 H 2220 VccB Rx VccB Rx C4 0.1 F 0603 Figure 8 - Recommended power supply filter 13 C3 0.1 F 0603 C2 10 F 1210 C1 10 F 1210 VCC DOUT+ CAC DIN+ RDL RECEIVER DOUT- ZIN CAC DIN- AC COUPLING CAPACITORS (DC BLOCKING CAPACITORS) SHOULD BE USED TO CONNECT DATA OUTPUTS TO THE LOAD. THE DIFFERENTIAL DATA PAIR SHOULD BE TERMINATED WITH A DIFFERENTIAL LOAD, RDL, OF 100 W USING EITHER AN INTERNAL LOAD, ZIN, AS SHOWN ABOVE, OR AN EXTERNAL LOAD, IF NECESSARY. Figure 9 - Recommended AC coupling and data signal termination DIN+ VDI/O+ + DVDIN TRANSMITTER DVDI/OH - DVDI/OL DINVDI/ODOUT+ + RECEIVER DVDOUT DOUT- DVDI/OH + DVDI/O P-P VDI/O REFERS TO EITHER VDIN OR VDOUT AS APPROPRIATE. DVDI/OL - Figure 10 - Differential signals VCC VCCT 50 W 50 W DOUT+ DIN+ 50 W ZIN 50 W VBIAS (NONIMAL 1.9V) DOUT- DINVEE VEE Figure 11 - Transmitter data input equivalent circuit 14 Figure 12 - Receiver data output equivalent circuit. NO FAULT DETECTED FAULT DETECTED < 100 s ~ 100 ns FAULT* TX OUT Ch 0 - 3 Figure 13 - Transmitter FAULT* signal timing diagram RESET* FAULT* >100 ns 18 ms (max) ~4.2 ms TX_OUT Ch 0 SHUTDOWN ~4.6 ms (typ) TX_OUT Ch 1 TX_OUT Ch 2 TX_OUT Ch 3 7.5 s (max) Figure 14 - Transmitter RESET* timing diagram 15 NORMAL TX_EN TX_DIS ~ 7.5 s TX OUT Ch 0 - 3 Normal Shutdown TX OUT Ch 0 - 3 Normal (a) TX_EN [1] ~ 7.5 s Shutdown (b) NOTE [1]: TX_DIS, WHICH IS NOT SHOWN, IS THE FUNCTIONAL COMPLEMENT OF TX_EN. ~18 ms ~4.2 ms ~4.6 ms TX OUT Ch 0 TX OUT Ch 1 TX OUT Ch 2 TX OUT Ch 3 (c) Figure 15 - Transmitter TX_EN and TX_DIS timing diagram > 1 ms ~18 ms TX_EN [1] ~ 200 ns FAULT* ~4.2 ms ~4.6 ms Tx OUT Ch 0 Tx OUT Ch 1 Tx OUT Ch 2 Tx OUT Ch 3 NOTE [1]. TX_DIS, WHICH IS NOT SHOWN, IS THE FUNCTIONAL COMPLEMENT OF TX_EN. Figure 16 - Transmitter fault recovery via TX_EN timing diagram 16 Vcc > 2.8V Vcc ~21 ms 6.5ms NORMAL TX_OUT 0 TX_OUT 1 TX_OUT 2 TX_OUT 3 NORMAL ~4.6ms ~4.6ms ~4.6ms Figure 17. Typical Transmitter Power-Up Sequence 17 NORMAL NORMAL Ordering Information The HFBR-7934WZ product is available for production orders through the Avago Technologies Component Field Sales Office. HFBR-7934WZ No EMI Nose Shield, with heatsink HFBR-7934EWZ with EMI Nose Shield, with heatsink HFBR-7934HWZ No heatsink, No EMI Nose Shield HFBR-7934EHWZ No heatsink, with EMI Nose Shield For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies Limited in the United States and other countries. Data subject to change. Copyright (c) 2005-2008 Avago Technologies Limited. All rights reserved. AV02-1185EN - April 18, 2008 18