HFM2010 Fiber Optic Transmitter Module FEATURES * DC to 10 Mb/s NRZ * Dynamic or static selection of power output * "Cap Rock" LED couples to variety of fibers * Operation on single +5 V supply FIBER017 TIF DESCRIPTION The HFM2010 transmitter module is an electrical to optical interface unit designed for point digital data transmission. The Low Profile Module provides both the electronics and the mechanical interface necessary to convert a TTL level input into an optically encoded output. The HFM2010 module's bipolar MASTERSLICE IC and CAP ROCK LED produce an encoded three level optical signal that is independent of data format such that biphase (Manchester) encoded data, NRZ data or any other format can be transmitted. Internal voltage regulation allows adjustment-free operation over the full operating temperature range without external power supply filtering. A unique feature of these modules allows the user to select power output to fit the application need. The module's binary encoded power output select inputs can be driven by open collector or standard TTL to dynamically select the power output, or they can be shorted to ground (or left open) to statically select power output. Another unique module feature allows the user to select the type of optical receptacle to fit to the application. The module's mechanical interface is simple enough to allow custom designed receptacles as well as the standard SMA style. The "sweet spot" of light projected into either connector provides for easy alignment of a variety of glass and plastic fibers. Honeywell reserves the right to make changes in order to improve design and supply the best products possible. OUTLINE DIMENSIONS in inches (mm) 0.32 (8.1) 0.13 (3.3) 0.10 (2.5) MIN 0.44 (11.2) 0.16 (4.1) 0.20 (5.1) 20 0.30 (7.6) 0.40 (10.2) 0.50 (12.7) 0.60 (15.2) 1 2 3 4 5 0.88 (22.4) 0.88 (22.4) 0.40 (10.2) 10 9 8 7 6 0.62 (15.7) 0.96 (24.4) 1.23 (31.2) 0.07 (1.8) 2-56 UNC-2B 2 PLACES 0.040 (1.02) DIA PIN 2 PLACES 1 2 3 4 5 10 9 8 7 6 FIBER027.DIM Pinout 1. P| power output select 6. GND ground 2. P power output select 7. IHB inhibit 3. P power output select 8. I Data input 4. DS driver select 9. ENB enable 5. GND ground 10 VUU power supply h 563 HFM2010 Fiber Optic Transmitter Module APPLICATION (continued) The Trilevel Transparent Code (TTC) optical signal is represented by three optical power levels: a. LOW - zero power out b. Hl - maximum power out (PY) c. OFF - 1/2 maximum power out (PI) This three level optical signal is therefore analogous to a bipolar voltage signal (+, -, zero) in a conventional system. The TTC encoder incorporated in the MASTERSLICE IC encodes a positive going input signal transition into a 50 ns wide LOW optical pulse and a negative going transition into a HI optical pulse. In addition, the encoder provides the appropriate width refresh pulse when the input is not transitioning. For TTL low input, HI refresh pulses are generated and output, and for TTL high input, LOW refresh pulses are output. The refresh pulses are required by the Receiver Module (HFM1011) to aid in decoding the trilevel optical signal back into the original TTL signal. The TTL encoding scheme makes the HFM2010 to HFM1011 fiber optic link "transparent" to data format. Any input pulse width from DC to 100 ns will be reproduced at the link output. Narrower pulse widths require special versions (internal module capacitor changes) of the HFM2010 module. The Power Output Selection inputs (pins 1, 2, 3) are used to statically or dynamically select the power output (see POWER OUTPUT SELECTION TABLE). With none of the select inputs grounded, 100% of the average power output (PI) is selected. Grounding any of the inputs reduces the optical power out and also the module power dissipation. Note IUU varies with PI selected. Typical values are: IUU = (80 + (% x .9) mA, where % is given in the POWER OUTPUT SELECTION TABLE. Example For P = 1, P| = 1, P = 0, IUU = 80 + (50 x .9) = 125. Notes 1. For PC board mounting, optical connector must overhang PC board edge to attach fiber cable. 2. For panel mounting, maximum recommended panel thickness is 0.156 in (3.96 mm). 3. Penetration greater than 0.09 (23) into tapped holes may damage module. The Data Input (pin 8) drives an internal gate that has 50 mV of hysteresis. Therefore, there is no limit to the rise/fall time of the input signal. An internal Schottky diode clamp on the Data Input limits negative overshoot to less than 1 V. 564 h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HFM2010 Fiber Optic Transmitter Module ELECTRO-OPTICAL CHARACTERISTICS (Values shown apply over ranges given in Recommended Operating Conditions unless otherwise stated. For TYP values VUU=5.0 V and TU=25C) PARAMETER SYMBOL High Level Input Current Low Level Input Current MIN IUY IUU II,|, IUU P (average) Supply Current [A] Power Output HFM2010-2X4 P Temperature Coefficient eP Pulse Amplitude Symmetry [A] K (=(PY-P)/P) Peak Wavelength aeI Propagation Delay [A] tIUY/tIYU Optical Pulse Width tI Data tI Refresh Refresh Pulse Repetition Rate f 100 TYP MAX UNITS TEST CONDITIONS 1 -1.2 -2.3 170 40 -1.6 -4.5 240 W mA mA mA W VU = 2.4 V VU = 0.4 V VI,|, = 0.4 V VI,|, = VUU, VU = 0.4 V Data input = 5 MHz, square wave, measured out of 10 m of 100 m core fiber, NA = 0.28, VUU = 5.0 V, TU = 25C VI,|, = VUU, VU = 0.4 V 140 -0.012 0.8 dB/C 1.2 800 850 13 900 23 40 35 0.7 50 50 1.1 60 75 2 nm ns ns TU = 25C MHz Notes 1. IUU varies with P selected. Typical values are IUU= ( 80 + ( % x .9)) mA, where % is given in the POWER OUTPUT SELECTION TABLE. EXAMPLE: For P=1, P|=2, P= 0, IUU= 80 + ( 50 x .9) = 125 mA. 2. K= ( PY - P)/P is a measure of the difference in amplitude between a HIGH pulse and a LOW pulse. 3. The refresh pulse is interrrupted if Data Input (VU) changes state during the refresh pulse. Min. propagation delay (typical reduction -3 ns) occurs for Data Input transitioning during the refresh pulse as shown in the OPTICAL ENCODING AND TIMING DIAGRAM. ABSOLUTE MAXIMUM RATINGS (25C Free-Air Temperature unless otherwise noted) Storage temperature -65 to +150C Case operating temperature -55 to +100C Lead solder temperature 260C, 10 s Supply voltage (VUU) -0.5 to +7 V Input voltage VU, VaU, VUY -0.5 to +5.5 V VO -0.5 to +0.9 V VI, VI|, VI VUU ABSOLUTE MAXIMUM RATINGS (continued) Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. Notes 1. The input voltage must be limited to 5.5 V max. even though VUU may be 7.0 V. Honeywell reserves the right to make changes in order to improve design and supply the best products possible. h 565 HFM2010 Fiber Optic Transmitter Module RECOMMENDED OPERATING CONDITIONS Case operating temperature -55 to +100C Supply voltage (VUU) +4.5 to +5.5 V Input voltage [A] VO Open VaU VU or VUU VUU GND High level input voltage [A] VUY 2.4 V to VUU VIY, VI|Y, VIY Low level input voltage [A] VUU 0 to +0.5 V VIU, VI|U, VIU Data input pulse width at 1.5 V points > 100 ns OPTICAL ENCODING AND TIMING DIAGRAM RECOMMENDED OPERATING CONDITIONS (continued) Notes 1. These three input input functions are not defined for Trilevel Transparent optical code. They are used only in the Bilevel code HFM2110 Transmitter Module. For proper module operation, connect as follows: Pin 9 to VUU or Pin 8 Pin 7 to GND Pin 4 leave open (do not connect). 2. The input voltage must be limited to 5.5 V max. even though VUU may be 7.0 V. 3. For dynamic power output selection, drive these inputs with open collector or standard TTL. For static power select, either GND the input or leave open, an internal pull-up is provided. See POWER OUTPUT SELECTION TABLE for available range OPTICAL ENCODING AND TIMING DIAGRAM FIBER012.SCH FIBER025.SCH HFM2010 - X X X LED Type 2 = Metal can (HFE4000) Optical Receptacle 2 = SMA Power Power (PO ) 4 = 100 W Example: HFM 2010-224 contains a metal can (HFE4000) LED in an SMA receptacle with minimum PO = 100 W BLOCK DIAGRAM FIBER102.SCH 566 h Honeywell reserves the right to make changes in order to improve design and supply the best products possible. HFM2010 Fiber Optic Transmitter Module OPTICAL ENCODING AND TIMING DIAGRAM FIBER013.CIR CAUTION The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation to equipment, take normal ESD precautions when handling this product. Honeywell reserves the right to make changes in order to improve design and supply the best products possible. h 567