OCP © STX / SRX SONET/SDH Transmitters & Receivers Features ! Fully compliant with SONET/SDH OC-1 to OC-24 (52 Mb/s, 156 Mb/s, 622 Mb/s & 1.25 Gb/s) specifications ! Long Reach 1310 nm (40 km distance), Long Reach 1550 nm (80 km distance) as well as Intermediate Reach (15 km) ! Eye Safe (Class I Laser Safety) ! - 40°C to +85°C Operating Temperature (option “A”) ! Multi-sourced 20-pin DIP metal package ! FC, ST, LC, MU, SC-connectorized fiber pigtails or Integral FC , SC or ST connector receptacle Description The STX and SRX modules are laser transmitters and receivers designed to meet or exceed the SONET/SDH optical interface requirements at OC-1 (52 Mb/s), OC-3/STM-1 (155 Mb/s), OC-12/STM-4 (622 Mb/s), and OC-24 (1.25 Gb/s) data rates. Many performance versions are available which are fully compliant with Intermediate Reach and Long Reach specifications at 1300 nm or 1550 nm wavelength. All modules satisfy Class I Laser Safety requirements in accordance with the US FDA/CDRH and international IEC-825 standards. A Signal Detect function which indicates loss of optical input is also provided. The transmitter features an Automatic Power Control (APC) circuit to maintain the optical output power at a constant level against variations in ambient temperature and device aging. A Laser Disable control input is also provided. The laser bias current and back-facet light output can also be monitored. The receiver features a low noise GaAs transimpedance IC with AGC capability to provide an extremely wide dynamic range. Both modules operate over an operating temperature range of 0°C to +70°C (“B” option) or -40°C to +85°C (“A” option). They are housed in a 20-pin dual-in-line metal package with integral ST, FC or SC connector receptacle or fiber pigtail (single mode fiber for the transmitter and 50 µm multimode fiber for the receiver). The fiber pigtail is terminated with ST, FC, LC, MU or SC connector. The transmitter can be operated with a single supply, either +5 V or - 5 V. The receiver can be operated with dual +5 V and - 5 V supply, or single +5 V supply, or single - 5 V supply. The electrical interface signals are differential ECL or PECL. If TTL interfaces for SIGNAL DETECT outputs are required, the SRX12-L receivers can be used (please refer to the SRX-12-L data sheet). Absolute Maximum Ratings Parameter Symbol Minimum Maximum Units Tst - 40 + 85 °C Storage Temperature Operating Temperature "A" option - 40 + 85 0 + 70 - - 85 % VCC - VEE 0 + 6.0 V Vin VEE VCC V - - Top "B" option Operating & Storage Humidity Supply Voltage Input Voltage (to Transmitter) Lead Soldering Temperature & Time °C 260°C, 10 sec Optical Communication Products, Inc. 1 21737-0400, Rev. O 2-7-2002 OC-1 Transmitter & Receiver: STX-01 & SRX-01 Transmitter Performance Characteristics (over Operating Case Temperature) Parameter Symbol B Data Rate Average Optical Output Power (coupled into single mode fiber), 50% duty cycle Typical Maximum Units Mb/s 5 52 100 HP - 3.0 0 +2.0 L0 - 5.0 - 3.0 0 - 8.0 - 5.0 - 2.0 L2 - 12.0 - 8.0 - 5.0 L3 - 15.0 - 11.0 - 8.0 10 - - 1261 1310 1360 1280 1310 1335 Po L1 Phi / Plo Extinction Ratio IR (Intermediate Reach) Center Wavelength Minimum λc LR1 (Long Reach 1310 nm) dBm dB nm 1480 1550 1580 Spectral Width (RMS) LR1 (0°C to 70°C) & IR ∆λRMS - - 4 Spectral Width (-20 dB) LR1 (-40°C to 85°C) & LR2 ∆λ20 - - 1 SMSR 30 - - dB tr, tf - 2 4 ns LR2 (Long Reach 1550 nm) Side Mode Suppression Ratio LR1 (-40°C to 85°C) & LR2 Optical Rise and Fall Time (10% to 90%) Optical Output Eye nm compliant with Bellcore TR-NWT-000253 and ITU-T Recommendation G.957 Receiver Performance Characteristics (over Operating Case Temperature) Parameter Symbol Data Rate Receiver Sensitivity (10-10 BER) 1 Maximum Input Optical Power (10-10 BER) 1 Signal Detect Thresholds Dual supply Maximum Units 5 52 100 Mb/s Pmin - 40.0 - 42.0 - dBm - 3.0 0 - - 6.0 0 - dBm Increasing Light Input Psd+ - - - 40.0 Decreasing Light Input Psd- - 50.0 - - λ 0.5 1.5 - dB 1100 - 1600 nm Signal Detect Hysteresis Wavelength of Operation 1 Typical B Pmax Single supply Minimum dBm 23 Specified in Average Optical Input Power and measured at 52 Mb/s and 1300 nm wavelength with 2 -1 PRBS. Model STX: Transmitter SRX: Receiver Package style PFC: pigtailed with FC PSC: pigtailed with SC PST: pigtailed with ST PLC: pigtailed with LC PMU: pigtailed with MU FC : FC Receptacle ST : ST Receptacle SC : SC Receptacle Ordering Information SXX - 01 - YYY -T- Ln - DR Temperature Range A: - 40°C to +85°C B: 0°C to +70°C Light Output (TX only) Distance Option (TX only) HP: 0 dBm (typ.) specifies the range for Center Wavelength & Spectral Width to be compliant L0: - 3 dBm (typ.) with SONET/SDH standard L1: - 5 dBm (typ.) “Blank” : Intermediate Reach L2: - 8 dBm (typ.) LR1 : Long Reach 1310 nm L3: - 11 dBm (typ.) LR2 : Long Reach 1550 nm NOTES 1. For full compliance with OC-1 Intermediate Reach standard, the STX-01-YYY-A-L3 & STX-01-YYY-B-L3 are recommended. 2. For full compliance with OC-1 Long Reach 1310 nm standard, the STX-01-YYY-A-L0-LR1 & STX-01-YYY-B-L0-LR1 are recommended. The STX-01-YYY-A-L0-LR1 uses a DFB laser to satisfy the - 40°C to +85°C requirement for Center Wavelength. 3. For full compliance with OC-1 Long Reach 1550 nm standard, the STX-01-YYY-A-L0-LR2 & STX-01-YYY-B-L0-LR2 are recommended. Both modules use DFB lasers. However, the STX-01-YYY-A-L0-LR2 module is specified only over - 25°C to +70°C temperature range. 4. The LR1 (-40°C to +85°C) and LR2 options are only available with DFB lasers and L0 or HP optical power levels. 21737-0400, Rev. O 2-7-2002 2 OC-3/STM-1 Transmitter & Receiver: STX-03 & SRX-03 Transmitter Performance Characteristics (over Operating Case Temperature) Parameter Symbol Minimum Typical Maximum Units B 50 156 300 Mb/s HP - 3.0 0 +2.0 L0 - 5.0 - 3.0 0 - 8.0 - 5.0 - 2.0 - 12.0 - 8.0 - 5.0 - 15.0 - 11.0 - 8.0 10 - - 1261 1310 1360 1280 1310 1335 1480 1550 1580 Data Rate Average Optical Output Power (coupled into single mode fiber), 50% duty cycle Po L1 L2 L3 Phi / Plo Extinction Ratio IR (Intermediate Reach) Center Wavelength λc LR1 (Long Reach 1310 nm) LR2 (Long Reach 1550 nm) Spectral Width (RMS) Spectral Width (-20 dB) Side Mode Suppression Ratio dBm dB nm LR1 (0°C to 70°C) & IR ∆λRMS - - 4 LR1 (-40°C to 85°C) & LR2 ∆λ20 - - 1 SMSR 30 - - dB tr, tf - 1 2 ns LR1 (-40°C to 85°C) & LR2 Optical Rise and Fall Time (10% to 90%) Optical Output Eye nm compliant with Bellcore TR-NWT-000253 and ITU-T Recommendation G.957 Receiver Performance Characteristics (over Operating Case Temperature) Parameter Symbol Minimum Typical Maximum Units B 50 156 200 Mb/s Pmin - 35.0 - 38.0 - dBm - 3.0 0 - - 6.0 0 - Data Rate -10 Receiver Sensitivity (10 BER) Maximum Input Optical Power (10-10 BER) 1 Signal Detect Thresholds 1 Dual supply Pmax Single supply Increasing Light Input Psd+ - - - 35.0 Decreasing Light Input Psd- - 45.0 - - λ 0.5 1.5 - dB 1100 - 1600 nm Signal Detect Hysteresis Wavelength of Operation 1 dBm dBm 23 Specified in Average Optical Input Power and measured at 156 Mb/s and 1300 nm wavelength with 2 -1 PRBS. Model STX: Transmitter SRX: Receiver Ordering Information SXX - 03 - YYY -T- Ln - DR Package style PFC: pigtailed with FC PSC: pigtailed with SC Temperature Range PST: pigtailed with ST A: - 40°C to +85°C PLC: pigtailed with LC B: 0°C to +70°C PMU: pigtailed with MU FC : FC Receptacle ST : ST Receptacle SC : SC Receptacle Light Output (TX only) Distance Option (TX only) HP: 0 dBm (typ.) specifies the range for Center Wavelength & Spectral Width to be compliant L0: - 3 dBm (typ.) with SONET/SDH standard L1: - 5 dBm (typ.) “Blank” : Intermediate Reach / S-1.1 L2: - 8 dBm (typ.) LR1 : Long Reach 1310 nm / L-1.1 L3: - 11 dBm (typ.) LR2 : Long Reach 1550 nm / L-1.2 NOTES 1. For full compliance with OC-3/STM-1 Intermediate Reach/S-1.1 standard, the STX-03-YYY-T-L3 modules are recommended. 2. For full compliance with OC-3/STM-1 Long Reach 1310 nm/L-1.1 standard, the STX-03-YYY-A-L0-LR1 & STX-03-YYY-BL0-LR1 are recommended. The STX-01-YYY-A-L0-LR1 uses a DFB laser to satisfy the Center Wavelength requirement. 3. For full compliance with OC-3/STM-1 Long Reach 1550 nm/L-1.2 standard, the STX-03-YYY-A-L0-LR2 & STX-03-YYY-BL0-LR2 are recommended. Both modules use DFB lasers. However, the STX-03-YYY-A-L0-LR2 module is specified only over - 25°C to +70°C temperature range. Please consult OCP Sales for the - 40°C to +70°C pigtailed option. 4. The LR1 (-40°C to +85°C) and LR2 options are only available with DFB lasers and L0 or HP optical power levels. 3 21737-0400, Rev. O 2-7-2002 OC-12/STM-4 Transmitter & Receiver: STX-12 & SRX-12 Transmitter Performance Characteristics (over Operating Case Temperature) Parameter Symbol Minimum Typical Maximum Units B 622 0 - 3.0 - 5.0 - 8.0 - 11.0 1310 1310 1310 1310 1550 - 700 +2.0 0 - 2.0 - 5.0 - 8.0 1360 1356 1334 1335 1580 4.0 2.5 4.0 1.0 Mb/s Data Rate HP L0 L1 L2 L3 SR & IR LR1 & LR2 SR (Short Reach) Average Optical Output Power (coupled into single mode fiber), 50% duty cycle Extinction Ratio Center Wavelength ∆λ20 SMSR 30 - - dB tr, tf - 0.5 1.0 ns Po Phi / Plo IR (Intermediate Reach) 1 50 - 3.0 - 5.0 - 8.0 - 12.0 - 15.0 8.2 10 1261 1274 1293 1280 1480 - λc LR1 (Long Reach 1310 nm) LR2 (Long Reach 1550 nm) SR (Short Reach) Spectral Width (RMS) 1 ∆λRMS IR (Intermediate Reach) Spectral Width (-20 dB) LR1 & LR2 Side Mode Suppression Ratio LR1 & LR2 Optical Rise and Fall Time (10% to 90%) dBm dB nm nm Optical Output Eye compliant with Bellcore TR-NWT-000253 and ITU-T Recommendation G.957 For Intermediate Reach version, the Center Wavelength is either 1274 nm ≤ λc ≤ 1356 nm for ∆λRMS ≤ 2.5 nm or 1293 nm ≤ λc ≤ 1334 nm for ∆λRMS ≤ 4.0 nm. 1 Receiver Performance Characteristics (over Operating Case Temperature) Parameter Symbol Minimum Typical Maximum Units B 50 622 700 Mb/s Pmin - 29.0 - 3.0 - 6.0 - 40.0 - 31.0 0 0 - - 29.0 - dBm 0.5 1.5 - dB 1100 - 1600 nm Data Rate Receiver Sensitivity (10 -10 BER) 1 Dual supply Single supply Increasing Light Input Decreasing Light Input Maximum Input Optical Power (10-10 BER) 1 Pmax Signal Detect Thresholds Psd+ Psd- Signal Detect Hysteresis λ Wavelength of Operation 1 dBm dBm Specified in Average Optical Input Power and measured at 622 Mb/s and 1300 nm wavelength with 223-1 PRBS. Model STX: Transmitter SRX: Receiver Ordering Information SXX - 12 - YYY -T- Ln - DR Package style PFC: pigtailed with FC PSC: pigtailed with SC Temperature Range PST: pigtailed with ST A: - 40°C to +85°C PLC: pigtailed with LC B: 0°C to +70°C PMU: pigtailed with MU FC : FC Receptacle ST : ST Receptacle SC : SC Receptacle Distance Option (TX only) specifies the range for Center Wavelength & Light Output (TX only) Spectral Width to be compliant HP: 0 dBm (typ.) with SONET/SDH standard L0: - 3 dBm (typ.) “Blank”: Short Reach (SR) L1: - 5 dBm (typ.) IR :Intermediate Reach / S-4.1 L2: - 8 dBm (typ.) LR1 : Long Reach 1310 nm / L-4.1 L3: - 11 dBm (typ.) LR2 : Long Reach 1550 nm / L-4.2 NOTES 1. For full compliance with OC-12/STM-4 Intermediate Reach/S-4.1 standard, the STX-12-YYY-T-L3-IR modules are recommended. 2. For full compliance with OC-12/STM-4 Long Reach 1310 nm/L-4.1 standard, the STX-12-YYY-T-HP-LR1 modules are recommended. They use DFB lasers to satisfy the Center Wavelength and Spectral Width requirement. 3. For full compliance with OC-12/STM-4 Long Reach 1550 nm/L-4.2 standard, the STX-12-YYY-T-HP-LR2 modules are recommended. Both modules use DFB lasers. However, the STX-12-YYY-A-HP-LR2 module is specified only over - 25°C to +70°C temperature range. Please consult OCP Sales for the - 40°C to +70°C pigtailed option. 4. The LR1 and LR2 options are only available with DFB lasers and L0 or HP optical power levels. 21737-0400, Rev. O 2-7-2002 4 OC-24 Transmitter & Receiver: STX-24 & SRX-24 Transmitter Performance Characteristics (over Operating Case Temperature) Parameter Symbol Minimum Typical Maximum Units B 50 1250 1500 Mb/s Data Rate Average Optical Output Power (coupled into single mode fiber), 50% duty cycle - 3.0 0 +2.0 - 5.0 - 8.0 - 12.0 - 15.0 - 3.0 - 5.0 - 8.0 - 11.0 0 - 2.0 - 5.0 - 8.0 Po SR & IR Extinction Ratio Center Wavelength HP L0 1 L1 L2 L3 Phi / Plo LR1 & LR2 SR (Short Reach) & IR (Intermediate Reach) LR1 (Long Reach 1310 nm) 2 λc LR2 (Long Reach 1550 nm) 8.2 - - 10 - - 1261 1310 1360 1280 1310 1335 dBm dB nm 1480 1550 1580 Spectral Width (RMS) 2 SR (Short Reach) ∆λRMS - - 4.0 Spectral Width (-20 dB) IR (Intermediate Reach) LR1 & LR2 ∆λ20 - - 1.0 1.0 nm SMSR 30 - - dB t r, tf - 0.3 0.5 ns Typical Maximum Units Side Mode Suppression Ratio LR1 & LR2 Optical Rise and Fall Time (10% to 90%) Optical Output Eye compliant with Bellcore TR-NWT-000253 1 The power specifications for the L0 version for LR2 is - 4.0 dBm min. and +1 dBm. max. Receiver Performance Characteristics (over Operating Case Temperature) Parameter Symbol Data Rate Receiver Sensitivity (10-10 BER) 1 Dual supply Maximum Input Optical Power (10-10 BER) 1 Single supply Increasing Light Input Signal Detect Thresholds Decreasing Light Input Wavelength of Operation 1 B 5 1250 1500 Mb/s Pmin - 26.0 +2 0 - - 22.0 - dBm Psd+ Psd- - 22.0 0 - 5.0 - 35.0 λ 0.5 1.5 - dB 1100 - 1600 nm Pmax Signal Detect Hysteresis Minimum dBm dBm Specified in Average Optical Input Power and measured at 1250 Mb/s and 1300 nm wavelength with 223-1 PRBS. Model STX: Transmitter SRX: Receiver Package style PFC: pigtailed with FC PSC: pigtailed with SC PST: pigtailed with ST PLC: pigtailed with LC PMU: pigtailed with MU FC : FC Receptacle ST : ST Receptacle SC : SC Receptacle Ordering Information SXX - 24 - YYY -T- Ln - DR Temperature Range A: - 40°C to +85°C B: 0°C to +70°C Distance Option (TX only) specifies the range for Center Wavelength & Light Output (TX only) Spectral Width to be compliant HP: 0 dBm (typ.) with SONET/SDH standard L0: - 3 dBm (typ.) “Blank”: Short Reach (SR) L1: - 5 dBm (typ.) IR :Intermediate Reach L2: - 8 dBm (typ.) LR1 : Long Reach 1310 nm L3: - 11 dBm (typ.) LR2 : Long Reach 1550 nm NOTES 1. The STX-24-YYY-A-L2 & STX-24-YYY-B-L2 are fully compliant with OC-24 Short Reach standard. 2. The STX-24-YYY-A-L0-IR & STX-24-YYY-B-L0-IR are fully compliant with OC-24 Intermediate Reach standard. The STX-24-YYY-A-L0-LR1 & STX-24-YYY-B-L0-LR1 are fully compliant with OC-24 Long Reach 1310 nm standard. The STX-24-YYY-A-L0-LR2 & STX-24-YYY-B-L0-LR2 are fully compliant with OC-24 Long Reach 1550 nm standard. They all use DFB lasers. In addition, the STX-24-YYY-A-L0-LR2 module is specified only over - 25°C to +70°C temperature range. 3. The IR option is available only with DFB lasers and L0 or HP optical power levels. 4. The LR1 and LR2 options are available only with DFB lasers and L0 or HP optical power levels. 5. The SRX-24 receiver is only specified for the Short Reach & Intermediate Reach standard. The Long Reach version is not available yet. 5 21737-0400, Rev. O 2-7-2002 Transmitter Electrical Interface Parameter STX / SRX Maximum Units 5.0 5.5 V 90 150 - 70 130 VIH VCC - 1.165 - VCC - 0.880 V Input LOW Voltage VIL VCC - 1.810 - VCC - 1.475 V Transmitter Disable Voltage VDIS VCC - 2.0 - VCC V Transmitter Enable Voltage VEN VEE - VEE + 0.8 V Supply Voltage 1 receptacled-DFB Supply Current all others Input HIGH Voltage Differential Bias Monitor Voltage at 25°C at 85°C Symbol Minimum Typical VCC - VEE 4.75 - I VBM,DIF mA - 80 120 - 280 500 100 200 mV VFM,DIF 20 Differential Back Facet Monitor Voltage 1 For - 5V single supply, connect VCC to 0V (circuit ground) and VEE to - 5V. For +5V single supply, connect VCC to +5V and VEE to 0V (circuit ground). CASE is always connected to circuit ground. mV Receiver Electrical Interface Parameter Supply Voltage 1 Symbol Minimum Typical Maximum Units VCC - VEE 4.75 5.0 5.5 V VPD - 10.0 - 5.0 - 2.0 V 85 mA - 120 VCC - 0.85 - VCC - 1.59 V I Supply Current VOH Output HIGH Voltage VCC - 1.06 VOL VCC - 1.86 Output LOW Voltage For +5V & - 5V dual supply: VCC = +5V, VEE = CASE = 0V (circuit ground) and VPD = - 5V. For +5V single supply : VCC = +5V and VEE = VPD = CASE = 0V (circuit ground). For - 5V single supply : VCC = CASE = 0V (circuit ground) and VEE = VPD = - 5V. CASE is always connected to circuit ground. V 1 The Signal Detect circuit monitors the level of the incoming optical signal and generates a logic LOW signal when insufficient photocurrent is produced. The SIGNAL DETECT outputs are PECL/ECL level requiring termination (510 ohms to VEE is recommended). If TTL interfaces for SIGNAL DETECT outputs are required, the SRX-12-L receivers can be used. Application Notes Transmitter: When the DATA+ input is at logic HIGH and DATA- input is at logic LOW, the LD is ON; and vice versa. In single-ended applications, the unused input pin should be biased to VCC - 1.29 V. The transmitter is normally enabled (i.e. when the DISABLE control input is not connected). When the DISABLE control input voltage is higher than VCC - 2 V, the laser is disabled (less than -30dBm output power) independent of the input data. Laser Safety: All transmitters are Class I Laser products per FDA/CDRH and IEC-825 standards. They must be operated under specified operating conditions. Receiver: Both differential DATA+ and DATA- outputs are PECL/ECL levels requiring termination (50 ohms to VCC - 2 volts or 510 ohms to VEE is recommended). For optimum performance, both outputs should be terminated in the same manner, even if only one is used. Optical Communication Products, Inc. DATE OF MANUFACTURE: MANUFACTURED IN THE USA This product complies with 21 CFR 1040.10 and 1040.11 Meets Class I Laser Safety Requirements Pin Assignments (Top View) CASE BIAS MONITOR + N/C BIAS MONITOR VEE VCC TRANSMIT DISABLE VCC VCC N/C N/C: No internal connection 21737-0400, Rev. O 2-7-2002 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 CASE FACET MONITOR + VCC FACET MONITOR DATA+ DATA VEE CASE VCC N/C Transmitter CASE N/C N/C N/C N/C VEE DATA+ VEE DATA VPD 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 Receiver 6 CASE N/C N/C N/C N/C VEE SIGNAL DETECT CASE SIGNAL DETECT+ VCC STX / SRX Pigtailed Transmitter Package For Fabry-Perot laser transmitters, only the top configuration is applicable. For DFB laser transmitters, both configurations are applicable. The pigtail length from the package edge is 1.0 meter minimum, 1.1 meter typical. Dimension in inches FC Receptacled Transmitter Package Dimension in inches ST Receptacled Transmitter Package Dimension in inches 7 21737-0400, Rev. O 2-7-2002 STX / SRX Pigtailed Receiver Package Dimension in inches The pigtail length from the package edge is 1.0 meter minimum, 1.1 meter typical. FC Receptacled Receiver Package Dimension in inches ST Receptacled Receiver Package Dimension in inches SC Receptacled Transmitter & Receiver Package Dimension in inches Optical Communication Products, Inc. 20961 Knapp Street, Chatsworth, CA 91311, Tel.: 818-701-0164, FAX: 818-701-1468, http://www.ocp-inc.com Optical Communication Products, Inc. reserves the right to make changes in equipment design or specifications without notice. Information supplied by Optical Communication Products, Inc. is believed to be accurate and reliable. However, no responsibility is assumed by Optical Communication Products, Inc. for its use nor for any infringements of third parties which may result from its use. No license is granted by implication or otherwise under any patent right of Optical Communication Products, Inc. 21737-0400, Rev. O 2-7-2002 8 Contents Description ................................................................................................................................... 1 Absolute Maximum Ratings ....................................................................................................... 1 OC-1 Transmitter & Receiver: STX-01 & SRX-01 .............................................. 2 OC-3/STM-1 Transmitter & Receiver: STX-03 & SRX-03.................................3 OC-12/STM-4 Transmitter & Receiver: STX-12 & SRX-12...............................4 OC-24 Transmitter & Receiver: STX-24 & SRX-24 ............................................5 Transmitter Electrical Interface ................................................................................................ 6 Receiver Electrical Interface ...................................................................................................... 6 Application Notes ......................................................................................................................... 6 Pin Assignments (Top View) ....................................................................................................... 6 Pigtailed Transmitter Package ................................................................................................................ 7 ST Receptacled Transmitter Package ..................................................................................................... 7 FC Receptacled Transmitter Package .................................................................................................... 7 Pigtailed Receiver Package ...................................................................................................................... 8 FC Receptacled Receiver Package .......................................................................................................... 8 ST Receptacled Receiver Package ........................................................................................................... 8 SC Receptacled Transmitter & Receiver Package ................................................................................ 8 9 21737-0400, Rev. 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