W91630 SERIES

Publication Release Date: June 1996

- 3 -

Revision A3

Pin Description, continued

SYMBOL

PIN NO.

I/O

FUNCTION

HKS

10

I

Hook switch input. Conventional CMOS input with an internal

than 150 mS (i.e., dialing is not terminated).

DP /C5

11

O

Open drain dialing pulse output (Figure 1).

Flash key causes DP /C5 to be active in both tone mode and pulse

mode.

DTMF

12

O

During pulse dialing, maintains low state at all times.

In tone mode, outputs a dual or single tone.

Detailed timing diagram for tone mode is shown in Figure 2(a, b).

OUTPUT FREQUENCY

Specified

Actual

Error %

R2

R3

R4

C1

C2

C3

697

770

852

941

1209

1336

1477

699

766

848

948

1216

1332

1472

+0.28

-0.52

-0.47

+0.74

+0.57

-0.30

-0.34

R1

14, 6

I

Power input pins.

P MUTE

5

O

The P MUTE is a conventional CMOS inverter output. It is high

during pulse dialing sequence and flash break. Otherwise, it

remains low.