The 7216040 40G QSFP+ TO 4×SFP+ Active Optical Cables are a high performance, low power consumption,long reach interconnect solution supporting 40G Ethernet.
It is compliant with QSFP+ MSA, IEEE 802.3bm 40GBASE-SR4 standard.40G QSFP+ AOC is an assembly of 4 full-duplex lanes, where each laneis capableof transmitting data at rates up to 10Gb/s, providing an aggregated rateof 40Gb/s.
1.GND is the symbol for single and supply(power) common for QSFP modules, All are common within the QSFP module and all module voltages are referenced to this potential otherwise noted. Connect these directly to the host board signal common ground plane. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
2.VccRx, Vcc1 and VccTx are the receiver and transmitter power suppliers and shall be applied concurrently. Recommended host board power supply filtering is shown below. VccRx, Vcc1 and VccTx may be internally connected within the QSFP transceiver module in any combination. The connector pins are each rated for maximum current of 500mA.
6.1 Pin Assignment for SFP+
6.2 Pin Assignment for SFP+
Pin
Symbol
Name/Description
NOTE
1
VEET
Transmitter Ground (Common with Receiver Ground)
1
2
TFAULT
Transmitter Fault.
2
3
TDIS
Transmitter Disable. Laser output disabled on high or open.
3
4
SDA
2-wire Serial Interface Data Line
4
5
SCL
2-wire Serial Interface Clock Line
4
6
MOD_ABS
Module Absent. Grounded within the module
4
7
RS0
Rate Select 0
5
8
LOS
Loss of Signal indication. Logic 0 indicates normal operation.
6
9
RS1
No connection required
1
10
VEER
Receiver Ground (Common with Transmitter Ground)
1
11
VEER
Receiver Ground (Common with Transmitter Ground)
1
12
RD-
Receiver Inverted DATA out. AC Coupled
13
RD+
Receiver Non-inverted DATA out. AC Coupled
14
VEER
Receiver Ground (Common with Transmitter Ground)
1
15
VCCR
Receiver Power Supply
16
VCCT
Transmitter Power Supply
17
VEET
Transmitter Ground (Common with Receiver Ground)
1
18
TD+
Transmitter Non-Inverted DATA in. AC Coupled.
19
TD-
Transmitter Inverted DATA in. AC Coupled.
20
VEET
Transmitter Ground (Common with Receiver Ground)
1
Note:
1.Circuit ground is internally isolated from chassis ground.
2.TFAULT is an open collector/drain output, which should be pulled up with a 4.7kΩ– 10 kΩ resistor on the host board if intended for use. Pull up voltage should be between 2.0V to Vcc + 0.3V.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 <0.8V.
3.Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V.
4.Should be pulled up with 4.7kΩ- 10kΩ on host board to a voltage between 2.0V and 3.6V. MOD_ABS pulls line low to indicate module is plugged in.
5.Internally pulled down per SFF-8431 Rev 4.1.
6.LOS is open collector output. It should be pulled up with 4.7kΩ – 10kΩ on host board to a voltage between 2.0V and 3.6V.
Logic 0 indicates normal operation; logic 1 indicates loss of signal.
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