W91572DNF 查看數據表（PDF） - Winbond

零件编号

产品描述 (功能)

生产厂家

W91572DNF

23-MEMORY TONE/PULSE DIALER WITH AUTOREDIAL RTC AND LCD DISPLAY FUNCTIONS

Winbond 

W91570DN SERIES

PIN DESCRIPTION

SYMBOL PIN NO.

Row,

Column

Inputs

29−33

and

20−28

XT1, XT

34, 35

T/P MUTE

16

H/P MUTE

15

KMUTE

6

HKS

36

I/O

FUNCTION

I The keyboard inputs may be used with either the standard 6×10

keyboard, an inexpensive single contact (form A) keyboard or

electronic input.

A valid key entry is defined by a single row being connected to

a single column.

I, A built-in inverter provides oscillation with an inexpensive

O 3.579545 MHz crystal or ceramic resonater.

The oscillator ceases when a keypad input is not sensed after

chip enable and dialing is finished. The crystal frequency

deviation is ±0.02%.

O The T/P MUTE is a conventional CMOS N-channel open drain

output.

The output transistor is switched on low level during the dialing

sequence (both pulse and tone mode), one-key redial break,

auto redial break and flash break. Otherwise, it is switched off.

O The H/P MUTE is a conventional CMOS inverter output. During

pulse dialing, one-key redial break, auto redial break, flash

break, hold, and mercury functions, this pin will output an active

high. It remains in a low state at all other times.

O The KMUTE is a CMOS N-channel open drain output. The

output transistor is switched on only during mute function.

Otherwise, it is switched off.

I Hook switch input.

HKS = VDD or floating: On-hook state. Chip in sleeping mode,

no operation.

HKS = VSS: Off-hook state. Chip enable for normal operation.

HKS pin is pulled to VDD by internal resistor.

Publication Release Date: May 1997

-3-

Revision A2

Share Link: