FTLX8512D3BTL Industrial Temperature XFP SR Specification – March 2013

F i n i s a r

 Finisar Corporation October 2013

Rev. D2

Page 2

I.

Pin Descriptions

Pin

Logic

Symbol

Name/Description

Ref.

1

GND

Module Ground

1

2

VEE5

Optional –5.2 Power Supply – Not required

3

LVTTL-I

Mod-Desel

Module De-select; When held low allows the module to

respond to 2-wire serial interface commands

4

LVTTL-O

Interrupt

Interrupt (bar); Indicates presence of an important condition

which can be read over the serial 2-wire interface

2

5

LVTTL-I

TX_DIS

Transmitter Disable; Transmitter laser source turned off

6

VCC5

+5 Power Supply – Not required

7

GND

Module Ground

1

8

VCC3

+3.3V Power Supply

9

VCC3

+3.3V Power Supply

10

LVTTL-I

SCL

Serial 2-wire interface clock

2

11

LVTTL-

I/O

SDA

Serial 2-wire interface data line

2

12

LVTTL-O

Mod_Abs

Module Absent; Indicates module is not present. Grounded

in the module.

2

13

LVTTL-O

Mod_NR

Module Not Ready; Finisar defines it as a logical OR

between RX_LOS and Loss of Lock in TX/RX.

2

14

LVTTL-O

RX_LOS

Receiver Loss of Signal indicator

2

15

GND

Module Ground

1

16

GND

Module Ground

1

17

CML-O

RD-

Receiver inverted data output

18

CML-O

RD+

Receiver non-inverted data output

19

GND

Module Ground

1

20

VCC2

+1.8V Power Supply – Not required

21

LVTTL-I

P_Down/RST Power Down; When high, places the module in the low

power stand-by mode and on the falling edge of P_Down

initiates a module reset

Reset; The falling edge initiates a complete reset of the

module including the 2-wire serial interface, equivalent to a

power cycle.

22

VCC2

+1.8V Power Supply – Not required

23

GND

Module Ground

1

24

PECL-I

RefCLK+

Reference Clock non-inverted input, AC coupled on the

host board – Not required

3

25

PECL-I

RefCLK-

Reference Clock inverted input, AC coupled on the host

board – Not required

3

26

GND

Module Ground

1

27

GND

Module Ground

1

28

CML-I

TD-

Transmitter inverted data input

29

CML-I

TD+

Transmitter non-inverted data input

30

GND

Module Ground

1

Notes:

1. Module circuit ground is isolated from module chassis ground within the module.

2. Open collector; should be pulled up with 4.7k

 – 10k on host board to a voltage between 3.15V and

3.6V.

3. A Reference Clock input is not required by the FTLX8512D3BTL. If present, it will be ignored.