AFBR-707SDZ Avago Technologies US Inc., AFBR-707SDZ Datasheet - Page 3

• Manufacturer Part Number: AFBR-707SDZ
• Description: 10Gb ETHERNET TRANSCEIVER, 1310NM
• Manufacturer: Avago Technologies US Inc.

Specifications of AFBR-707SDZ

• Supply Voltage: 3.3V
• Wavelength Typ: 1310nm
• Applications: Gigabit Ethernet
• Data Rate: 10.312Gbd
• Wavelength: 1310nm
• Voltage - Supply: 3.135 V ~ 3.465 V
• Connector Type: LC Duplex
• Mounting Type: SFP+
• Optical Fiber Type: TX/RX
• Data Transfer Rate: 10313MBd
• Operating Temperature Classification: Commercial
• Peak Wavelength: 1355nm
• Package Type: SFP
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Output Current: 20mA
• Operating Temp Range: 0C to 70C
• Mounting: Snap Fit To Panel
• Pin Count: 20
• Leaded Process Compatible: Yes
• Peak Reflow Compatible (260 C): Yes
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Transmitter Section
The transmitter section includes the Transmitter Opti-
cal Sub-Assembly (TOSA) and laser driver circuitry. The
TOSA, containing an Avago designed and manufactured
1310 nm FP light source, is located at the optical inter-
face and mates with the LC optical connector. The TOSA
is driven by an IC which uses the incoming differential
high speed logic signal to modulate the laser diode driv-
er current. This Tx laser driver circuit regulates the optical
power at a constant level provided the incoming data
pattern is DC balanced.
Transmit Disable (TX_DISABLE)
The AFBR-707SDZ accepts an LVTTL compatible trans-
mit disable control signal input which shuts down the
transmitter optical output. A high signal implements this
function while a low signal allows normal transceiver op-
eration. In the event of a fault (e.g. eye safety circuit ac-
tivated), cycling this control signal resets the module as
depicted in Figure 6. An internal pull up resistor disables
the transceiver transmitter until the host pulls the input
low. TX_DISABLE can also be asserted via the two-wire
interface (address A2h, byte 110, bit 6) and monitored
(address A2h, byte 110, bit 7).
The contents of A2h, byte 110, bit 6 are logic OR’d with
hardware TX_DISABLE (contact 3) to control transmitter
operation. The normal behavior of this feature is to reset
a TX disabled transceiver to TX enabled when it is power
cycled or hot-plugged.
Figure 1. Transceiver functional diagram
3
OPTICAL INTERFACE
LIGHT FROM FIBER
LIGHT TO FIBER
RECEIVER
TRANSMITTER
PHOTO-DETECTOR
FP
CONTROLLER & MEMORY
Transmit Fault (TX_FAULT)
A catastrophic laser fault will activate the transmitter sig-
nal, TX_FAULT, and disable the laser. This signal is an open
collector output (pull-up required on the host board). A
low signal indicates normal laser operation and a high
signal indicates a fault. A fault is defined as laser pow-
er below or above the specified IEEE 802.3aq min/max
range. The TX_FAULT will be latched high when a laser
fault occurs and is cleared by toggling the TX_DISABLE
input or power cycling the transceiver. The transmitter
fault condition can also be monitored via the two-wire
serial interface (address A2, byte 110, bit 2).
LINEAR
TRANSIMPEDANCE
AMPLIFIER
CIRCUITRY
DRIVER &
SAFETY
LASER
RD+ (RECEIVE DATA)
RD– (RECEIVE DATA)
RX_LOS
RS0
RS1
SDA
SCL
MOD-ABS
TX_DISABLE
TD+ (TRANSMIT DATA)
TD– (TRANSMIT DATA)
TX_FAULT
ELECTRICAL INTERFACE