W91510 datasheet(3/16 Pages) WINBOND

Part #	W91510

Description	TONE/PULSE DIALER WITH HANDFREE AND SAVE FUNCTION

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Manufacturer	WINBOND [Winbond]

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W91510N SERIES

Publication Release Date: May 1997

- 3 -

Revision A2

Pin Description, continued

SYMBOL

18-PIN 20-PIN

I/O

FUNCTION

MODE

13

15

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 W91511N/511AN, M/B = 40:60).

Floating mode pin places the dialer in pulse mode

(10 ppS; 20 ppS for W91511N/511AN, M/B = 33.3:66.7).

HKS

10

12

I

Hook switch input.

HKS = VDD: On-hook state. Chip in sleeping mode, no

operation.

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

operation.

HKS pin is pulled to VDD by an internal resistor.

DP

11

13

O

N-channel open drain dialing pulse output.

Flash key will cause DP to be active in either tone mode or

pulse mode.

The timing diagram for pulse mode is shown in Figure 1(a, b,

c).

VDD, VSS

14, 6

16, 6

I

Power input pins.

KT

5

O

Key-tone signal output. The key tone is generated for all

valid keys. Frequency is 600 Hz and duration is 35 mS.

DTMF

12

14

O

In pulse mode, this pin remains in low state at all times.

In tone mode, it will output a dual or single tone.

Detailed timing diagram for tone mode is shown in Figure

2(a, b, c).

Specified

Actual

Error %

Output Frequency

R1

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

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