W91580 查看數據表（PDF） - Winbond

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W91580

24-MEMORY TONE/PULSE SWITCHABLE DIALER WITH HANDFREE AND HOLD FUNCTIONS

Winbond 

W91580 SERIES

Pin Description, continued

SYMBOL 22-PIN 24-PIN 28-PIN I/O

FUNCTION

MODE

15

17

19

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, M/B = 2:3).

Leaving mode pin floating places the dialer in

pulse mode (10 ppS, M/B = 1:2).

HKS

12

14

16

I Hook switch input.

HKS = 1: On-hook state. Chip in sleep mode, no

operation.

HKS = 0: Off-hook state. Chip enabled for normal

operation.

HKS pin is pulled to VDD by internal resistor.

DP /C9

13

15

17 O N-channel open drain dialing pulse output

(see Figure 1).

Flash key causes DP to go active when in pulse

mode and tone mode.

NC

17

19

22

- No connection.

DTMF

14

16

18 O In pulse mode, remains in 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.

OUTPUT FREQUENCY

Specified

Actual

Error %

R1

697

699

+0.28

R2

770

766

-0.52

R3

852

848

-0.47

R4

941

948

+0.74

C1

1209

1216

+0.57

C2

1336

1332

-0.30

C3

1477

1472

-0.34

VDD, VSS 16, 8 18, 8 20, 10 I Power input pins.

Publication Release Date: Auguest 1995

-3-

Revision A3

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