Datenblatt-Suchmaschine für elektronische Bauteile |
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C-127-2500-FDFB-SLC2 Datenblatt(PDF) 4 Page - Source Photonics, Inc. |
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C-127-2500-FDFB-SLC2 Datenblatt(HTML) 4 Page - Source Photonics, Inc. |
4 / 10 page 4 2.5 Gbps Single Mode SFF LC Transceiver C-1XX-2500(C)-FDFB-SLCX 20550 Nordhoff St. • Chatsworth, CA 91311 • tel: 818.773.9044 • fax: 818.576.9486 9F, No 81, Shui Lee Rd. • Hsinchu, Taiwan, R.O.C. • tel: 886.3.5169222 • fax: 886.3.5169213 LUMNDS851-Jul2005 rev. A.0 LUMINENTOIC.COM Recommended Circuit Schematic Inputs to the C-1XX-2500(C)-FDFB-SLCX series transmitters are AC coupled and internally terminated through 50 ohms to AC ground. These transceivers can operate with LVPECL or CML logic levels. The input signal must have at least a 200 mV peak to (single ended) signal swing. Output from the receiver section of the module is also AC coupled and is expected to drive into 50 ohm load. Different termination strategies may be required depending on the particular Serializer / Deserializer chip set used. The C-1XX-2500(C)-FDFB-SLCX series product family are designed with AC coupled data inputs and outputs to provide the following advantages: ■ Close positioning of SERDES with respect to transceiver; allows for shorter line lengths and at gigabit speeds reduces EMI. ■ Minimum number of external components. ■ Internal termination reduces the potential for unterminated stubs which would otherwise increase jitter and reduce transmission margin. Figure 1 & Figure 2 illustrates the recommended transmit and receive data line trminations for SERDES with CML and LVPECL Inputs / Outputs respectively. BIAS PIN RECEIVER TZ AMP AMP POST RD - RD + TD - TD + Z=50� Z=50� Z=50� Z=50� See Fig. 4A See Fig. 3 Note � DRIVER LASER TRANSMITTER RX_GND RX_D RX_D SD Vcc_RX Vcc_TX TX_D TX_D TX_GND TX_DIS � 5 4 3 6 2 �0 9 7 8 TTL logic level Serializer / De-Serializer with CML lnputs/Outputs Figure 1.Recommended TRANSMIT and RECEIVE Data Terminations for SERDES with CML I/Os. Note 1. Consult SERDES manufacturer’s data sheet and application data for appropriate receiver input biasing network. Some deserializer inputs are internally terminated and may not need external termination resistors. |
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