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AFCT-57R5ANPZ Datasheet(PDF) 4 Page - AVAGO TECHNOLOGIES LIMITED |
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AFCT-57R5ANPZ Datasheet(HTML) 4 Page - AVAGO TECHNOLOGIES LIMITED |
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4 / 22 page  4 Receiver Section The receiver section includes a Receiver Optical SubAs- sembly (ROSA), pre-amplification and post-amplification circuit, Clock and Data Recovery Circuit and an electrical output stage with variable emphasis controls. The ROSA, containing a high speed PIN detector, pre-amplifier and imaging optics efficiently couple light from the LC con- nector interface and perform an optical to electrical con- version. The resulting differential electrical signal passes through a post amplification circuit and into a Clock and Data Recovery circuit (CDR) for cleaning up accumulated jitter. The resulting signal is passed to a high speed output line driver stage with variable, i2c controlled, emphasis settings allowing the host to optimize signal characteris- tics between the SFP and host ASIC. Note the Rx CDR is engaged only with Rx_RATE=high (16GFC) and bypassed with Rx_RATE=low (8G/4G). Receiver Loss of Signal (Rx_LOS) The post-amplification IC also includes transition detec- tion circuitry which monitors the ac level of incoming op- tical signals and provides a TTL/CMOS compatible status signal to the host (pin 8). An adequate optical input results in a low Rx_LOS output while a high Rx_LOS output in- dicates an unusable optical input. The Rx_LOS thresholds are factory set so that a high output indicates a definite optical fault has occurred. Rx_LOS can also be monitored via the two-wire serial interface (address A2h, byte 110, bit 1). Functional Data I/O The AFBR-57F5PZ interfaces with the host circuit board through twenty I/O pins (SFP electrical connector) identi- fied by function in Table 2. The board layout for this inter- face is depicted in Figure 6. The AFBR-57F5PZ high speed transmit and receive inter- faces require SFP MSA compliant signal lines on the host board. To simplify board requirements, biasing resistors and ac coupling capacitors are incorporated into the SFP transceiver module (per SFF-8074i) and hence are not re- quired on the host board. The Tx_Disable, Tx_Fault, and Rx_LOS lines require TTL lines on the host board (per SFF- 8074i) if used. If an application chooses not to take advan- tage of the functionality of these pins, care must be taken to ground Tx_Disable (for normal operation). Figure 2 depicts the recommended interface circuit to link the AFBR-57F5PZ to supporting physical layer ICs. Timing for MSA compliant control signals implemented in the transceiver are listed in Figure 4. Application Support An Evaluation Kit and Reference Designs are available to assist in evaluation of the AFBR-57F5PZ. Please contact your local Field Sales representative for availability and ordering details. Caution There are no user serviceable parts nor maintenance re- quirements for the AFBR-57F5PZ. All mechanical adjust- ments are made at the factory prior to shipment. Tam- pering with, modifying, misusing or improperly handling the AFBR-57F5PZ will void the product warranty. It may also result in improper operation and possibly overstress the laser source. Performance degradation or device fail- ure may result. Connection of the AFBR-57F5PZ to a light source not compliant with ANSI FC-PI specifications, oper- ating above maximum operating conditions or in a man- ner inconsistent with it’s design and function may result in exposure to hazardous light radiation and may constitute an act of modifying or manufacturing a laser product. Per- sons performing such an act are required by law to re-cer- tify and re-identify the laser product under the provisions of U.S. 21 CFR (Subchapter J) and TUV. Ordering Information Please contact your local field sales engineer or one of Avago Technologies franchised distributors for ordering information. For technical information, please visit Avago Technologies’ WEB page at www.avagotech.com or contact Avago Technologies Semiconductor Products Customer Response Center at 1-800-235-0312. For information re- lated to SFF Committee documentation visit www.sffcom- mittee.org. Regulatory Compliance The AFBR-57F5PZ complies with all applicable laws and regulations as detailed in Table 1. Certification level is de- pendent on the overall configuration of the host equip- ment. The transceiver performance is offered as a figure of merit to assist the designer. |
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