FTLF8528P2BCV Pluggable SFP+ Product Specification – November 2007

© Finisar Corporation November 21, 2007 Rev. B

Page 2

I.

Pin Descriptions

Pin

Symbol

Name/Description

Ref.

1

Transmitter Ground (Common with Receiver Ground)

1

2

Transmitter Fault.

2

3

Transmitter Disable. Laser output disabled on high or open.

3

4

SDA

2-wire Serial Interface Data Line (MOD-DEF2)

4

5

SCA

2-wire Serial Interface Clock (MOD-DEF1)

4

6

MOD_ABS

4

7

RS0

Rx Rate Select:

Open or Low =

High =

2.125 or 4.25 Gb/s Fibre Channel (Low Bandwidth)

8.5 Gb/s Fibre Channel (High Bandwidth)

5

8

LOS

Loss of Signal indication. Logic 0 indicates normal operation.

6

9

RS1

Tx Rate Select:

Open or Low =

High =

2.125 or 4.25 Gb/s Fibre Channel (Low Bandwidth)

8.5 Gb/s Fibre Channel (High Bandwidth)

5

10

Receiver Ground (Common with Transmitter Ground)

1

11

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

Receiver Ground (Common with Transmitter Ground)

1

15

Receiver Power Supply

16

Transmitter Power Supply

17

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

Transmitter Ground (Common with Receiver Ground)

1

Notes:

1.

Circuit ground is internally isolated from chassis ground.

2.

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.

4.

Should be pulled up with 4.7k – 10kohms on host board to a voltage between 2.0V and 3.6V.

MOD_ABS pulls line low to indicate module is plugged in.

5.

Rate select can also be set through the 2-wire bus in accordance with SFF-8472 v. 10.1

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.

6.

LOS is open collector output. Should be pulled up with 4.7k – 10kohms on host board to a voltage

between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates loss of signal.