AFBR-703ASDZ Datasheet, PDF (4/19 Pages) AVAGO TECHNOLOGIES LIMITED – 10Gb Ethernet, 850 nm, 10GBASE-SR, Extended Temperature, SFP+ Transceiver

Receiver Section
Caution
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-703ASDZ interfaces with the host circuit board
through the twenty contact SFP+ electrical connector.
See Table 2 for contact descriptions. The module edge
connector is shown in Figure 4. The host board layout for
this interface is depicted in Figure 7.
The AFBR-703ASDZ 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 incorpor­ ated 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 recomm­ ended interface circuit to
link the AFBR-703ASDZ to supporting physical layer ICs.
Timing for the dedicated SFP+ control signals imple-
mented in the transceiver are listed in Figure 6.
There are no user serviceable parts nor maintenance
requirements for the AFBR-703ASDZ. All mechanical
adjustments are made at the factory prior to shipment.
Tampering with, modifying, misusing or improperly han-
dling the AFBR-703ASDZ 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-703AS-
DZ to a light source not compliant with IEEE Std. 802.3ae
Clause 52 and SFF-8341 specifications, operating above
maximum operating conditions or in a manner inconsis-
tent 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. 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.
Application Support
An Evaluation Kit and Reference Designs are available to
assist in evaluation of the AFBR-703ASDZ. Please contact
your local Field Sales representative for availability and
ordering details.
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