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AFBR-709ASMZ Datasheet(PDF) 4 Page - AVAGO TECHNOLOGIES LIMITED |
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AFBR-709ASMZ Datasheet(HTML) 4 Page - AVAGO TECHNOLOGIES LIMITED |
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4 / 19 page  4 Receiver Section The receiver section includes the Receiver Optical Sub- Assembly (ROSA) and the amplification/quantization cir- cuitry. The ROSA, containing a PIN photodiode and cus- tom transimpedance amplifier, is located at the optical interface and mates with the LC optical connector. The ROSA output is fed to a custom IC that provides post- amplification and quantization. Receiver Loss of Signal (Rx_LOS) The post-amp IC also includes transition detection cir- cuitry which monitors the AC level of incoming optical signals and provides a LVTTL/CMOS compatible status signal to the host. A high status signal indicates loss of modulated signal, indicating link failures such as broken fiber or failed transmitter. Rx_LOS can also be monitored via the two-wire serial interface(address A2h, byte 110, bit 1). Functional Data I/O The AFBR-709ASMZ interfaces with the host circuit board through the twenty contact SFP+ electrical con- nector. See Table 2 for contact descriptions. The mod- ule edge connector is shown in Figure 4. The host board layout for this interface is depicted in Figure 8. The AFBR-709ASMZ high speed transmit and receive in- terfaces require SFF-8431 compliant signal lines on the host board. To simplify board requirements, biasing re- sistors and AC coupling capacitors are incorporated into the SFP+ transceiver module (per SFF-8431) and hence are not required on the host board. The TX_DISABLE, TX_ FAULT and RX_LOS signals require LVTTL signals on the host board (per SFF-8431) if used. If an application does not take advantage of these functions, care must be tak- en to ground TX_DISABLE to enable normal operation. Figure 2 depicts the recommended interface circuit to link the AFBR-709ASMZ to supporting physical layer ICs. Timing for the dedicated SFP+ control signals imple- mented in the transceiver are listed in Figure 6. Application Support An Evaluation Kit and Reference Designs are available to assist in evaluation of the AFBR-709ASMZ. Please con- tact your local Field Sales representative for availability and ordering details. Caution There are no user serviceable parts nor maintenance requirements for the AFBR-709ASMZ. All mechanical adjustments are made at the factory prior to shipment. Tampering with, modifying, misusing or improperly han- dling the AFBR-709ASMZ will void the product warranty. It may also result in improper operation and possibly overstress the laser source. Performance degradation or device failure may result. Connection of the AFBR- 709ASMZ to a light source not compliant with IEEE Std. 802.3ae Clause 52 and SFF-8341 specifications, operat- ing 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 consti- tute an act of modifying or manufacturing a laser prod- uct. Persons performing such an act are required by law to recertify and re-identify the laser product under the provisions of U.S. 21 CFR (Subchapter J) and TUV. Customer Manufacturing Processes This module is pluggable and is not designed for aque- ous wash, IR reflow, or wave soldering processes. Ordering Information Please contact your local field sales engineer or one of Avago Technologies franchised distributors for ordering information. For technical information, please visit Ava- go Technologies’WEB page at www.avagotech.com For information related to SFF Committee documentation visit www.sffcommittee.org. |
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