W91320 Ver la hoja de datos (PDF) - Winbond

Número de pieza

componentes Descripción

Fabricante

W91320

TONE/PULSE DIALER WITH REDIAL FUNCTION

Winbond 

W91320N SERIES

PIN DESCRIPTION

SYMBOL 18-PIN

Column-

Row

Inputs

1−4

&

15−18

20-PIN

1−4

&

17−20

XT, XT

T/P

MUTE

7, 8

9

7, 8

(8, 9,

W91320LN

only)

9

(10,

W91320LN

only)

MODE

13

15

(14,

W91320LN

only)

HKS

10

12

(11,

W91320LN

only)

22-PIN

1−4

&

19−22

8, 9

I/O

FUNCTION

The keyboard inputs may be used with

I either the standard 5 × 5 keyboard or

the inexpensive single contact (Form A)

keyboard. Electronic input from a µC

can also be used.

A valid key-in is defined as a single row

being connected to a single column

I, O A built-in inverter provides oscillation

with an inexpensive 3.579545 MHz

crystal or ceramic resonator.

10

O The T/P MUTE is a conventional

CMOS N-channel open drain output.

The output transistor is switched on

during dialing sequence, one-key redial

break and flash break time. Otherwise,

it is switched off.

16

I Pulling mode pin to VSS places the

dialer in tone mode.

Pulling mode pin to VDD places the

dialer in pulse mode. (10 ppS; 20 ppS

for W91321N/321AN M/B = 40:60)

Floating mode pin places the dialer in

pulse mode. (10 ppS; 20 ppS for

W91321N/321AN M/B = 33.3:66.7)

13

I Hook switch input.

HKS = VDD: On-hook state. Chip in

sleeping mode, no operation.

HKS = VSS: Off-hook state. Chip is

enable for normal operation.

HKS pin is pulled to VDD by internal

resistor.

Publication Release Date: May 1997

-3-

Revision A2

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