Winbond Electronics W91354AN, W91352N, W91352AN, W91350N, W91350AN Datasheet

W91350N SERIES

13-MEMORY TONE/PULSE DIALER WITH

HANDFREE AND HOLD FUNCTIONS

GENERAL DESCRIPTION

The W91350N series are tone/pluse switchable telephone dialers with thirteen memories, hold
function, and a handfree dialing control circuit. Fabricated using CMOS technology, the W91350N series
offer good performance in low-voltage and low-power applications.

FEATURES

• DTMF/pulse switchable dialer

• Two by 32-digit redial memory and save memory

• Three by 16-digit one-touch direct repertory memory

• Ten by 16-digit two-touch direct repertory memory

• Cascaded dialing allowed, with unlimited dialing length

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

• 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

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

• On-hook debounce time: 150 msec.

• Minimum tone output duration: 93 msec. (W91354AN: 87 mS)

• Minimum intertone pause: 93 msec. (W91354AN: 87 mS)

• Flash break time (73, 100, 300, 600 msec) selectable by keypad; pause time is 1.0 sec.

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

• On-chip power-on reset

• Uses 3.579545 MHz crystal or ceramic resonator

• Packaged in 18 or 20-pin plastic DIP

The different dialers in the W91350N series are shown in the following table:

•

TYPE NO. REPLACEMENT

TYPE NO.

W91350N W91350 10 600/300/73/100 Pin - 18

W91351
W91352N W91352 20 600/300/73/100 Pin - 18
W91350AN W91350A 10 600/300/73/100 Pin Yes 20

W91351A
W91352AN W91352A 20 600/300/73/100 Pin Yes 20
W91354AN New type 10 600/300/73/100 Pin Yes 20

PULSE

(ppS)

FLASH

(mS)

M/B HANDFREE

DIALING

PACKAGE

(PINS)

Note: The W91354AN is for use in France only. The pause time is not added in pulse-to-tone function mode.

Publication Release Date: May 1997

- 1 - Revision A2

PIN CONFIGURATIONS

XT

234

789

10

HFI

HKS

DTMF

MODE

R4

R3

R2

R1

13

18

19

16

15

14

12

11

HFO

XT

XT12

3

4

7

8

9

HKS

DTMF

MODE

R4R3R2

R1

12

18

16

15

14

10

11

13

XT

MUTE

MUTE

HKS

HKS

HKS

HKS

C1
C2
C3
C4

H/P MUTE

V

SS

W91350N SERIES

1

C1

17

5
6

V

DD

C2
C3
C4

H/P MUTE

V

SS

5
6

20

17

V

DD

T/P MUTE

XT

DP/C5

W91350N/352N W91350AN/352AN/354AN

T/P MUTE

DP/C5

PIN DESCRIPTION

SYMBOL 18-PIN 20-PIN I/O FUNCTION

Column-

Row Inputs

XT,

T/P

1−4

&

15−18

1−4

&

17−20

7, 8 7, 8 I, O A built-in inverter provides oscillation with an inexpensive

9 9 O

MODE 13 15 I Pulling mode pin to VSS places the dialer in tone mode.

10 12 I Hook switch input.

The keyboard inputs may be used with either a standard
5 × 5 keyboard or an inexpensive single contact (Form A)

I

keyboard. Electronic input from a µC can also be used.
A valid key in is defined as a single row being connected to
a single column.

3.579545 MHz crystal or ceramic resonator.
The T/P

is a conventional CMOS N-channel open
drain output.
The output transistor is switched on during dialing sequence
and flash break time. Otherwise, it is switched off.

Pulling mode pin to VDD places the dialer in pulse mode
with M/B ratio of 40:60 (10 ppS, except for
W91352N/352AN = 20 ppS).
Floating mode pin places the dialer in pulse mode with M/B
ratio of 33.3:66.7 (10 ppS, except for W91352N/352AN =
20 ppS).

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

operation.

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

operation.

pin is pulled to VDD by an internal resistor.

- 2 -

W91350N SERIES

DP/C5

R1

R3

R4

C1

C2

C3

HFI

HFI

CURRENT STATE

Input

HFO

Dialing

HFI

Pin Description, continued

SYMBOL 18-PIN 20-PIN I/O FUNCTION

11 13 O N-channel open drain dialing pulse output.

Flash key will cause DP/C5 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.

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).

Output Frequency

Specified Actual Error %

+0.28

-0.52

-0.47
+0.74
+0.57

-0.30

-0.34

R2

697
770

852
941
1209
1336

1477

699
766

848

948
1216
1332

1472

, HFO

- 10, 11 I, O Handfree control pins. The handfree control state is toggled
on by a low pulse on the

input pin. The status of the

handfree control state is described in the following table:

NEXT STATE

Hook SW.

On Hook

Off Hook

On Hook

Off Hook

Off Hook

HFO

Low

High
High

Low
High

HFI

HFI
HFI

Off Hook
On Hook Low

On Hook High

High
Low
Low

Low

Yes

No
Yes
Yes

No

Yes

pin is pulled to VDD by an internal resistor.

Detailed timing diagram is shown in Figure 3.

H/P MUTE 5 5 O The H/P MUTE is a conventional inverter output. During

pulse dialing, flash break or hold period, this output is active
high; otherwise, it remains in low state.

Publication Release Date: May 1997

- 3 - Revision A2

BLOCK DIAGRAM

DP/C5

W91350N SERIES

XT XT

ROW

(R1 to R4, Vx)

COLUMN

(C1 to C4)

DTMF

KEYBOARD

INTERFACE

D/A

CONVERTER

FUNCTIONAL DESCRIPTION

Keyboard Operation

C1 C2 C3 C4

1 2 3 S M1 R1
4 5 6 F4 M2 R2
7 8 9 A M3 R3

∗/T

0 # R/P SAVE R4

F1 F2 F3 H VX

LOCATION

LATCH

ROW & COLUMN

PROGRAMMABLE

COUNTER

READ / WRITE

COUNTER

RAM

DATA LATCH
& DECODER

SYSTEM CLOCK

GENERATOR

CONTROL

LOGIC

PULSE

CONTROL

LOGIC

HKS
HFI

MODE

H/P MUTE
T/P MUTE

DP/C5
HFO

• S: Store function key

• H: Hold function key

• A: Indirect repertory memory dialing function key

• R/P: Redial and pause function key

• SAVE: Save function key

• ∗/T: ∗ in tone mode and P→T in pulse mode

• M1, ..., M3: One-touch memory

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

Notes:
D1, ..., Dn, D1', ..., Dn': 0, ..., 9, */T, #
Mn: M1 , ..., M3 ; Ln: 0, ..., 9; Fn: F1, ..., F4

- 4 -

Normal Dialing

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

HFI

¡õ

W91350N SERIES

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 normal dialing.

&

),

D1 , D2 ,

Dn

...,

Redialing

OFF HOOK , (or ON HOOK
ON HOOK , OFF HOOK , (or ON HOOK

1. The redial memory content will be dialed out.

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

3. If redialing length exceeds 32 digits, the redialing function will be inhibited.

&

),

D1 , D2 , ..., Dn Busy, Come

&

),

R/P

Number Store

OFF HOOK , (or ON HOOK

Mn ( or Ln )

1. If the sequence of the dialed digits D1, D2, ..., Dn has not
finished,

2. D1, D2, ..., Dn will be dialed out and stored in memory location.

&

),

D1 , D2 ,

Dn , S , S ,

...,

S will be ignored.

OFF HOOK , (or ON HOOK &

Mn ( or Ln )

3. D1, D2, ..., Dn will be stored in memory location but will not be dialed out.

4. R/P and */T keys can be stored as a digit in memory.
In store mode, R/P is the pause function key.

5. The store mode is released after the store function is executed or when the state of the hook
switch changes.

), S , D1 , D2 , ..., Dn , S ,

Repertory Dialing

OFF HOOK , (or ON HOOK &

OFF HOOK , (or ON HOOK &

), Mn

), A , Ln

Access Pause

Publication Release Date: May 1997

- 5 - Revision A2