Winbond Electronics W91561LN, W91561ALN, W91560N, W91560BN, W91560AN Datasheet

W91560N SERIES

DP

3-MEMORY TONE/PULSE DIALER WITH SAVE,

KEYTONE, LOCK AND HANDFREE FUNCTIONS

GENERAL DESCRIPTION

The W91560N series are tone/pulse switchable telephone dialers with three memories, keytone or
lock, and handfree dialing control. These chips are fabricated using Winbond's high-performance
CMOS technology and thus offer good performance in low-voltage, low-power operations.

FEATURES

• DTMF/pulse switchable dialer

• Two by 32 digit redial and save memory

• Three by 16 digit one-touch direct repertory memory

• Pulse-to-tone (*/T) keypad for long distance call operation

• Cascaded dialing

• Uses 5 × 5 keyboard

• Easy operation with redial, flash, pause, and */T keypads

• Pause, P→T (pulse-to-tone) can be stored as a digit in memory

• On-hook debounce time: 150 mS (Unlock Mode), 200 mS (Lock Mode)

• 0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out

• Dialing rate (10 ppS or 20 ppS) selectable by bonding option

• Minimum tone output duration: 93 mS

• Minimum intertone pause: 93 mS

• Pause time: 3.6 sec.

• 300 mS off-hook delay in lock mode (

• Flash break time (73 mS, 100 mS, 300 mS, or 600 mS) selectable by keypad; pause time is 1.0S

• Make/break ratio (40:60 or 33.3:66.7) selectable by MODE pin

• Key tone output for valid keypad entry recognition

• On-chip power-on reset

• Uses 3.579545 MHz crystal or ceramic resonator

• 18 or 20-pin dual-in-line plastic package

• The different dialers in the W91560N series are shown in the following table:

TYPE NO. REPLACEMENT

TYPE NO.

W91560N W91560 10 600/300/73/100 Yes - - 18
W91560AN W91560A 10 600/300/73/100 Yes - Yes 20
W91560BN W91560B 20 600/300/73/100 Yes - Yes 20
W91561LN W91561L 10 600/300/73/100 - Yes - 18
W91561ALN W91561ALN 10 600/300/73/100 - Yes Yes 20

PULSE

(ppS)

remains low for 300 mS while off hook)

FLASH

(mS)

KEY

TONE

LOCK HANDFREE

DIALING

PACKAGE

(PINS)

Publication Release Date: February 1996

- 1 - Revision A1

PIN CONFIGURATIONS

W91560N SERIES

V

T/P MUTE

1

C1

C2

C3

C4

KT

SS

XT

XT

1

2

3

4

5

6

7

8

9 10

18

17

16

15

14

13

12

11

W91560N

C1

C2

C3

1

2

3

18

17

16

R4

R3

R2

R1

V

DD

MODE

DTMF

DP/C5

HKS

R4

R3

R2

V

T/P MUTE

HFI

C2

C3

C4

KT

SS

XT

XT

C2

C3

C4

2

3

4

5

6

7

8

9

10 11

W91560AN/BN

1

2

3

4

R4C1

20

R3

19

R2

18

R1

17

V

16

15

14

13

12

20

19

18

17

DD

MODE

DTMF

DP/C5

HKS

HFO

R4C1

R3

R2

R1

LOCK

V

T/P MUTE

C4

SS

XT

XT

4

5

6

7

8

9 10

15

14

13

12

11

W91561LN

R1

V

DD

MODE

DTMF

DP/C5

HKS

LOCK

V

XT

T/P MUTE

HFI

SS

XT

5

6

7

8

9

10 11

W91561ALN

V

16

15

14

13

12

DD

MODE

DTMF

DP/C5

HKS

HFO

- 2 -

W91560N SERIES

XT

MUTE

MUTE

HKS

HKS

HKS

HKS

HKS

PIN DESCRIPTION

SYMBOL 18-PIN 20-PIN I/O FUNCTION

Column-

Row Inputs

XT 7 7 I A built-in inverter provides oscillation with an

T/P

MODE 13 15 I

1−4

&

15−18

8 8 O Crystal oscillator output pin.
9 9 O

10 12 I

1−4

&

17−20

I The keyboard input is compatible with a standard 5 x 5

keyboard, an inexpensive single contact (Form A)
keyboard, and electronic input.

In normal operation, any single button can be pushed to
produce dual tone, pulses, or function. Activation of two
or more buttons will result in no response except for
single tone.

inexpensive 3.579545 MHz crystal. The oscillator
ceases when a keypad input is not sensed. The crystal
frequency deviation is 0.02%.

The T/P
open drain output.

The output transistor is switched on low level during
dialing sequence (both pulse and tone mode).
Otherwise, it is switched off.

Pulling mode pin to VSS places dialer in tone mode.
Pulling mode pin to VDD places dialer in pulse mode

with M/B ratio of 40:60 (10 ppS, except for W91560BN,
which is 20 ppS).

Leaving mode pin floating places dialer in pulse mode
with M/B ratio of 33.3:66.7 (10 ppS, except for
W91560BN, which is 20 ppS).

The
the handset is on-hook or off-hook.

(hook switch) input is used to sense whether

is a conventional CMOS N-channel

KT 5

(except for
W91561LN)

5

(except for

W91561ALN)

In on-hook state,
operation.

In off-hook state,
operation.

pin is pulled to VDD by internal resistor.

O

The key tone output is a conventional CMOS inverter.
The key tone is generated when any valid key is
pressed; the KT pin generates a 1.2 KHz square wave at
35 mS. When no key is pressed, the KT pin remains in
low state.

- 3 - Revision A1

= 1: chip is in sleeping mode, no

= 0: chip is enabled for normal

Publication Release Date: February 1996

W91560N SERIES

LOCK

LOCK

DP

C5

Pin Description, continued

SYMBOL 18-PIN 20-PIN I/O FUNCTION

5

(only for

W91561LN)

5

(only for

W91561ALN)

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

I

"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

pin is shown below:

/

11 13 O

DTMF 12 14 O

LOCK PIN

V

DD

Floating

V

SS

FUNCTION

"0", "9" dialing inhibited
Normal dialing mode
"0" dialing inhibited

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).
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

R1
R2
R3
R4
C1
C2
C3

Specified

697
770
852

941
1209
1336
1477

Actual

699
766
848

948
1216
1332
1472

Error %

+0.28

-0.52

-0.47

+0.74

+0.57

-0.30

-0.34

VDD, VSS 14, 6 16, 6 I

Power input pins for the dialer chip. VDD is the main
power and VSS is the ground.

- 4 -

W91560N SERIES

HFI

HFI

HFI

Pin Description, continued

SYMBOL 18-PIN 20-PIN I/O FUNCTION

,

HFO

- 10, 11 I, O Handfree control pins.
A low pulse on the

control state.
Status of the handfree control state is listed in the
following table:

input pin toggles the handfree

BLOCK DIAGRAM

CURRENT STATE

HOOK SW.

­On Hook
Off Hook

HFO

Low
High

High
On Hook
Off Hook
Off Hook

Low

High

-

INPUT

HFI
HFI
HFI

Off Hook
On Hook
On Hook

NEXT STATE

HFO

High
Low
Low
Low
Low
High

DIALING

Yes

No
Yes
Yes

No
Yes

pin is pulled to VDD by an internal resistor.

Detailed timing diagram is shown in Figure 3.

XT XT

HKS

HFI

SYSTEM CLOCK
GENERATOR

ROW

(R1 to R4, Vx)

COLUMN

(C1 to C4)

DTMF

KEYBOARD
INTERFACE

D/A

CONVERTER

LOCATION
LATCH

ROW & COLUMN
PROGRAMMABLE
COUNTER

- 5 - Revision A1

READ/WRITE
COUNTER

RAM

DATA LATCH
& DECODER

CONTROL

LOGIC

PULSE
CONTROL
LOGIC

LOCK

MODE

T/P MUTE
KT
DP/C5

HFO

Publication Release Date: February 1996

W91560N SERIES

C1C2C3

C4

DP/C5

HFI

¡õ

HFI

¡õ

HFI

¡õ

FUNCTIONAL DESCRIPTION

Keyboard Operation

1 2 3 S M1 R1
4 5 6 F4 M2 R2

7 8 9 M3 R3
*/T 0 # R/P SAVE R4
F1 F2 F3 Vx

• S: Store function key

• R/P: Redial and pause function key

• */T: * in tone mode and P→T key in pulse mode

• SAVE: Save function key for one-touch 32-digit memory

• M1 to M3: One-touch memory

• F1, ..., F4: Flash function keys: F1 = 600 mS, F2 = 300 mS, F3 = 73 mS, F4 = 100 mS, and all

flash pause time is 1.0 mS

Note: Mn = M1, ..., M3; */T, #, Pause.

Normal Dialing

OFF HOOK (or ON HOOK &

1. D1, D2, ..., Dn will be dialed out.

2. Dialing length is unlimited, but redial is inhibited if length exceeds 32 digits in nomal dialing.

), D1 , D2 , ..., Dn

Redialing

OFF HOOK (or ON HOOK &

ON HOOK , OFF HOOK (or ON HOOK &

1. The redial memory content will be D1, D2, ..., Dn.

2. The R/P key can execute the redial function only as first key-in after off-hook; otherwise, it will
execute the pause function.

), D1 , D2 , ..., Dn BUSY, Come

), R/P

- 6 -