SFP-8GD-LR MRV [MRV Communications, Inc.], SFP-8GD-LR Datasheet - Page 4

• Manufacturer Part Number: SFP-8GD-LR
• Description: 8 Gbps Bi-Directional SFP+ Transceiver
• Manufacturer: MRV [MRV Communications, Inc.]

Datasheet
Notes:
Pin Descriptions
Pin
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
1.
2.
3.
4.
5.
6.
Circuit ground is internally isolated from chassis ground.
T
intended for use. Pull up voltage should be between 2.0 V to Vcc + 0.3 V. A high output indicates a transmitter fault caused
by either the TX bias current or the TX output power exceeding the preset alarm thresholds. A low output indicates normal
operation. In the low state, the output is pulled to < 0.8 V.
Laser output disabled on T
Should be pulled up with 4.7 k – 10 kohms on host board to a voltage between 2.0 V and 3.6 V. MOD_ABS pulls line low to
indicate module is plugged in.
Rate select can also be set through the 2-wire bus in accordance with SFF-8472 v. 10.1. Rx Rate Select is set at Bit 3, Byte 110,
Address A2h. Tx Rate Select is set at Bit 3, Byte 118, Address A2h. Note: writing a “1” selects maximum bandwidth operation.
Rate select is the logic OR of the input state of Rate Select Pin and 2-wire bus.
LOS is open collector output. Should be pulled up with 4.7 k – 10 kohms on host board to a voltage between 2.0 V and 3.6 V.
Logic 0 indicates normal operation; logic 1 indicates loss of signal.
FAULT
MOD_ABS
Function
T
is an open collector/drain output, which should be pulled up with a 4.7 k – 10 kohms resistor on the host board if
V
SDA
SCA
V
V
RD+
V
V
V
V
TD+
V
T
RS0
LOS
RS1
RD-
FAULT
TD-
CCR
CCT
EET
DIS
EER
EER
EER
EET
EET
DIS
> 2.0 V or open, enabled on T
Tx Rate Select:
Open or Low = 2.125 or 4.25 Gbps Fibre Channel (Low Bandwidth)
Open or Low = 2.125 or 4.25 Gbps Fibre Channel (Low Bandwidth)
Rx Rate Select:
Loss of Signal Indication. Logic 0 Indicates Normal Operation.
Transmitter Disable. Laser Output Disabled on High or Open.
Transmitter Ground (Common with Receiver Ground)
Receiver Ground (Common with Transmitter Ground)
Receiver Ground (Common with Transmitter Ground)
Receiver Ground (Common with Transmitter Ground)
Transmitter Ground (Common with Receiver Ground)
Transmitter Ground (Common with Receiver Ground)
High = 8.5 Gbps Fibre Channel (High Bandwidth)
High = 8.5 Gbps Fibre Channel (High Bandwidth)
Transmitter Non-Inverted DATA In. AC Coupled.
Receiver Non-Inverted DATA Out. AC Coupled.
2-wire Serial Interface Data Line (MOD-DEF2)
Transmitter Inverted DATA In. AC Coupled.
Receiver Inverted DATA Out. AC Coupled.
Module Absent, connected to V
2-wire Serial Interface Clock (MOD-DEF1)
4
Transmitter Power Supply
Receiver Power Supply
DIS
Name/Description
Transmitter Fault.
< 0.8 V.
EET
or V
EER
Note
1
2
3
4
4
4
5
6
5
1
1
1
1
1
-
-
-
-
-
-