MITSUBISHI (OPTICAL DEVICES)

MF-156DF-T12-20x/29x/23x

MF-156DS-R13-17x

SONET/SDH TRANSMITTER & RECIEVER

RECEIVER PIN ALLOCATION

No.

Symbol

Description

No.

Symbol

Description

1

GND

Ground

20

NC

No user connection

2

GND

Ground

19

NC

No user connection

3

GND

Ground

18

NC

No user connection

4

CLK

Clock

17

NC

No user connection

5

CLK

Clock

16

GND

Ground

6

GND

Ground

15

GND

Ground

7

Data

Data

14

SD

Signal Detect

8

GND

Ground

13

GND

Ground

9

Data

Data

12

SD

Signal Detect

10

PDB

Photo Detector Bias

11

Vcc

Vcc

RECEIVER PIN DESCRIPTIONS

Pin No.

Function

I/O

Pin description

1,2,3,

6,8,13,

15,16

GND

I

These pin are the module’s ground connections.

They should be connected to a low inpedance ground plane(0V).

11

Vcc

I

This is the power supply pin for the module.

It should be connected to +5.0V.

Recommended power supply decoupling.

7,9

Data & Data

O

There are Data output pin(Differential PECL output).

Signal level of these pin are PECL level.

Refer to electrical interface in NOTE4.

4,5

Clock & Clock

O

There are recoverd clock output pin(Differential PECL output).

Signal level of these pin are PECL level.

Refer to electrical interface in NOTE4.

12,14

Signal Detect

&

Signal Detect

O

When the opt ical input signal fall bellow the SD threshold level, The

Signal Detect is deassert ed and its out put logic level changes form a

PECL HIGH to PECL LOW.

Signal Detect pin is differential PECL output pin.

Refer to electrical interface in NOTE5.

10

Photo Detector Bias

I

This pin supplies the bias for the PI N Photo Detector and it should be

connected to +5.0V.

Additionally,by using Ext ernal Resistor in series with this pin, it is possible

to measure the photocurrent.

Refer to electrical interface in NOTE8.

17,18,

19,20

NC

-

These pin are No user connection and should be left open.