HBCU-5710R Datasheet, PDF (6/25 Pages) AVAGO TECHNOLOGIES LIMITED – Designed for Industry-Standard MSA-Compliant, Small Form Factor Pluggable (SFP) Ports

Table 2: 20-pin Connection Diagram Description
Pin Name
Function/Description
MSA Notes
1
V_EET
2
TX Fault
Transmitter Ground
Transmitter Fault Indication - High Indicates a Fault
Note 1
3
TX Disable
Transmitter Disable - Module disables on high or open
Note 2
4
MOD-DEF2
Module Definition 2 - Two wire serial ID interface
Note 3
5
MOD-DEF1
Module Definition 1 - Two wire serial ID interface
Note 3
6
MOD-DEF0
Module Definition 0 - Grounded in module
Note 3
7
Rate Select
Not Connected
8
LOS
Loss of Signal - High Indicates Loss of Signal
Note 4
9
V_EER
10
V_EER
11
V_EER
12
RD-
Receiver Ground
Receiver Ground
Receiver Ground
Inverse Received Data Out
Note 5
13
RD+
Received Data Out
Note 5
14
V_EER
15
V_CCR
16
V_CCT
17
V_EET
18
TD+
Receiver Ground
Receiver Power - 3.3 V +/- 5%
Transmitter Power - 3.3 V +/- 5%
Transmitter Ground
Transmitter Data In
Note 6
Note 6
Note 7
19
TD-
Inverse Transmitter Data In
Note 7
20
V_EET
Transmitter Ground
Notes:
1. TX Fault is not used and is always tied to ground.
2. TX Disable as described in the MSA is not applicable to the 1000BASE-T module, but is used for convenience as an input to reset the internal
ASIC. This pin is pulled up within the module with a 4.7 KW resistor.
Low (0 – 0.4V):
Transceiver on
Between (0.4V and 2.0 V): Undefined
High (2.0 – 3.465 V):
Transceiver in reset state
Open:
Transceiver in reset state
3. Mod-Def 0,1,2. These are the module definition pins. They should be pulled up with a 4.7-10 KW resistor on the host board to a supply less than
V_CCT + 0.3 V or V_CCR + 0.3 V.
Mod-Def 0 is grounded by the module to indicate that the module is present
Mod-Def 1 is clock line of two wire serial interface for optional serial ID
Mod-Def 2 is data line of two wire serial interface for optional serial ID
4. LOS (Loss of Signal) is not used and is always tied to ground in Figure 4.
5. 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 370 and 2000 mV differential (185 – 1000 mV single ended) when properly terminated. These levels are compatible with CML and
LVPECL voltage swings.
6. V_CCR and V_CCT are the receiver and transmitter power supplies. They are defined as 3.3 V ± 5% at the SFP connector pin. The maximum supply
current is 370 mA and the associated in-rush current will typically be no more than 30 mA above steady state after 500 nanoseconds.
7. TD-/+: These are the differential transmitter inputs. They are ac coupled differential lines with 100 W differential termination inside the module.
The ac coupling is done inside the module and is thus not required on the host board. The inputs will accept differential swings of 500 – 2400
mV (250 – 1200 mV single ended), though it is recommended that values between 500 and 1200 mV differential (250 – 600 mV single ended)
be used for best EMI performance. These levels are compatible with CML and LVPECL voltage swings.