PIN LIST

Pin Number

Name

Type

Description

1

D3

Output

Isolation Signal Output

2

D4

Output

Isolation Signal Output

3

RIN

Input

Ring Signal Input

4

D5

Input

Isolation Control Signal Input

5

D6

Input

Isolation Control Signal Input

6

TOFF

Supply

Internal Reference Supply

7

LIM2

Input

Loop Current Limiter Control

8

LIM1

Output

Loop Current Limiter Control

9

IDC

Output

Caller ID Control Output

10

COM

Output

Off-hook & ID Commun Output

11

OHC

Output

Off-hook Control Output

12

N.C.

-

Not Connected

13

N.C.

-

Not Connected

14

IREF

Input

Current Reference Setting

15

VDREF

Supply

Internal Reference Pin

16

TER2

Output

Current Regulator Control Feedback

17

TER1

Output

Current Regulator Control Output

18

SET

Input

Current Regulator Filter

19

VDR

Supply

Line DC Voltage Regulator

20

LINE

Output

Line AC Signal Output

21

IDG

Input

Caller ID Voltage Reference Input

22

IDI

Input

Caller ID Signal Input

23

LINI

Input

Line AC Signal Input

24

GAIN

Input

Transmit Gain / Trans-Hybrid Loss Set

25

LCOM

Ground

Line Side Common Ground

26

AIN

Input

Analog Transmit Signal Input

27

AOUT

Output

Analog Transmit Signal Output

28

N.C.

-

Not Connected

29

N.C.

-

Not Connected

30

D1

Input

Isolation Signal Input

31

D2

Input

Isolation Signal Input

32

LCOM

Ground

Line Side Common Ground

Note : Pins 12, 13, 28 and 29 must be left opened.

ST952

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