W91580 datasheet(2/19 Pages) WINBOND

Part #	W91580

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

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Manufacturer	WINBOND [Winbond]

Direct Link	http://www.winbond.com

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W91580 SERIES

- 2 -

PIN CONFIGURATIONS

R2

R1

R4

1

2

3

4

5

18

19

20

21

22

C1

C3

C4

C5

C2

C6

C7

6

7

8

9

14

15

16

17

MODE

DTMF

10

11

12

13

XT

R3

VDD

VSS

R5

XT

T/P MUTE

HKS

DP/C9

NC

R2

R1

R4

1

2

3

4

5

20

21

22

23

24

C1

C3

C4

C5

C2

C6

C7

6

7

8

9

16

17

18

19

MODE

DTMF

10

11

12

13

14

15

XT

HFO

R3

VDD

VSS

R5

XT

T/P MUTE

HFI

HKS

DP/C9

NC

R2

R1

R4

1

2

3

4

5

24

25

26

27

28

C1

C3

C4

C5

C2

C6

C7

6

7

8

9

20

21

22

23

MODE

DTMF

10

11

12

17

18

19

XT

R3

VDD

VSS

R5

XT

DP/C9

HKS

13

14

15

16

HFO

T/P MUTE

HFI

C8

KT

DRS

HPM MUTE

NC

W91580

W91580A

W91580B/C

PIN DESCRIPTION

SYMBOL

22-PIN

24-PIN

28-PIN

I/O

FUNCTION

Column-

Row

Inputs

1

−7

&

18

−22

1

−7

&

20

−24

1

−8

&

24

−28

I

The keyboard input may be used with either the

standard 9

× 5 keyboard or an inexpensive

single contact (form A) keyboard. Electronic

input from a

µC can also be used.

A valid key entry is defined by a single row

being connected to a single column.

XT, XT

9, 10

11, 12

I, O

A built-in inverter provides oscillation with an

inexpensive 3.579545 MHz crystal or ceramic

resonator.

T/P MUTE

11

13

O

The T/P MUTE is a conventional CMOS

N-channel open drain output.

The output transistor is switched on during pulse

and tone mode dialing sequence and flash

break. Otherwise, it is switched off.

HPM

MUTE

-

23

O

The HPM MUTE is a conventional inverter

output. During pulse dialing, flash, hold, and

mercury mute functions, this pin will output an

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

times.

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