HFBR-59L1AL Datasheet, PDF (7/16 Pages) Agilent(Hewlett-Packard) – Agilent HFBR-59L1AL 1.25 GBd Ethernet and 1.0625 GBd Fibre Channel 850 nm SFF Low Voltage (3.3 V) Optical Transceiver

Table 2. Pin Description
Pin
Name
1
V_EER
2
V_CCR
3
SD
4
RD-
5
RD+
6
VCCT
7
VEET
8
TX Disable
9
TD+
10
TD-
Function/Description
Receiver Ground
Receiver Power: 3.3 V ±10%
Signal Detect: Low indicates Loss of Signal
Inverse Received Data Out
Received Data Out
Transmitter Power: 3.3V ±10%
Transmitter Ground
Transmitter Disable: Module disables on High
Transmitter Data In
Inverse Transmitter Data In
MSA Notes
1
5
3
4
4
5
1
2
Notes:
1. Transmitter and Receiver Ground are common in the internal module PCB. They are electrically connected to signal ground within the module, and to
the housing shield (see Note 5 in Figure 7c). This housing shield is electrically isolated from the nose shield which is connected to chassis ground
(see Note 4 in Figure 7c).
2. TX disable input is used to shut down the laser output per the state table below. It is pulled down internally within the module with a 9.0 KW resistor.
Low (0 – 0.8 V):
Transmitter on
Between (0.8 V and 2.0 V): Undefined
High (2.0 – 3.465 V):
Transmitter Disabled
Open:
Transmitter Enabled
3. SD (Signal Detect) is a normally high LVTTL output. When high it indicates that the received optical power is adequate for normal operation. When
Low, it indicates that the received optical power is below the worst case receiver sensitivity, a fault has occurred, and the link is no longer valid.
4. RD-/+: These are the differential receiver outputs. They are ac coupled 100 W differential lines which should be terminated with 100 W differential at
the user SerDes. The ac coupling is done inside the module and is thus not required on the host board. The voltage swing on these lines will be
between 400 and 2000 mV differential (200 – 1000 mV single ended) when properly terminated. These levels are compatible with CML and LVPECL
voltage swings.
5. V_CCR and V_CCT are the receiver and transmitter power supplies. They are defined as 2.97 – 3.63 V at the PTH connector pin. The maximum supply
current is 200 mA.
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