W91560 データシートの表示（PDF） - Winbond

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W91560

3-MEMORY TONE/PULSE DIALER WITH SAVE, KEYTONE, LOCK AND HANDFREE FUNCTIONS

Winbond 

W91560N SERIES

Pin Description, continued

SYMBOL 18-PIN

20-PIN I/O

FUNCTION

LOCK

5

(only for

W91561LN)

5

(only for

W91561ALN)

I The function of this terminal is to prevent "0" dialing and

"9" dialing under PABX system long distance call

control. When the first key input after reset is 0 or 9, all

key inputs, including the 0 or 9 key, become invalid and

the chip generates no output. The telephone is

reinitialized by a reset.

The function of the LOCK pin is shown below:

LOCK PIN

FUNCTION

VDD

"0", "9" dialing inhibited

Floating

Normal dialing mode

VSS

"0" dialing inhibited

DP / C5

11

DTMF

12

VDD, VSS 14, 6

13

14

16, 6

O N-channel open drain dialing pulse output.

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

or pulse mode.

In lock mode, the DP remains low for 300 mS during off-

hook delay time.

The timing diagram for pulse mode is shown in Figure 1

(a, b, c, d).

O During pulse dialing, this pin remains in low state

regardless of keypad input. In the tone mode, it will

output a dual or single tone.

A detailed timing diagram for tone mode is shown in

Figure 2(a, b, c, d).

OUTPUT FREQUENCY

Specified

R1

697

Actual

699

Error %

+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

I Power input pins for the dialer chip. VDD is the main

power and VSS is the ground.

-4-

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