W91320N SERIES

TONE/PULSE DIALER WITH HANDFREE

LOCK AND HOLD FUNCTIONS

Publication Release Date: May 1997

- 1 -

Revision A2

GENERAL DESCRIPTION

The W91320N series are Si-gate CMOS ICs that provide the necessary signals for tone or pulse
dialing. The W91320N series provide one-key redial, handfree dialing, hold, redial, and lock
functions.

FEATURES

DTMF/pulse switchable dialer

32-digit redial memory

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

Uses 5

5 keyboard

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

Pause, pulse-to-tone (*/T) can be stored as a digit in memory

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

Off-hook delay 300 mS in lock mode ( DP will keep low for 300 mS while off hook)

First key-in delay 300 mS output in lock mode

Dialing rate (10, 20 ppS ) selected by bonding option

Minimum tone output duration: 93 msec.

Minimum intertone pause: 93 msec.

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

On-chip power-on reset

Uses 3.579545 MHz crystal or ceramic resonator

Packaged in 18, 20, or 22-pin plastic DIP

The different dialers in the W91320N series are shown in the following table:

TYPE NO.

REPLACEMENT

TYPE NO.

PULSE

(ppS)

FLASH

(mS)

M/B

HANDFREE

DIALING

LOCK

PACKAGE

(PINS)

W91320N

W91320

600/100/300/73

W91321N

W91321

600/100/300/73

W91320AN

W91320A

600/100/300/73

Yes

W91321AN

W91321A

600/100/300/73

Yes

W91320LN

W91322L

600/100/300/73

Yes

W91320ALN

W91322AL

600/100/300/73

Yes

W91320N SERIES

- 2 -

PIN CONFIGURATIONS

HKS

DTMF

MODE

HFO

W91320AN/W91321AN

T/P MUTE

HFI

H/P MUTE

DP/C5

W91320ALN

LOCK

T/P MUTE

HFI

HKS

DTMF

MODE

HFO

H/P MUTE

DP/C5

W91320N/W91321N

HKS

DTMF

MODE

T/P MUTE

H/P MUTE

DP/C5

W91320LN

LOCK

T/P MUTE

HKS

DTMF

MODE

H/P MUTE

DP/C5

W91320N SERIES

Publication Release Date: May 1997

- 3 -

Revision A2

PIN DESCRIPTION

SYMBOL

18-PIN

20-PIN

22-PIN

I/O

FUNCTION

Column-

Row

Inputs

The keyboard inputs may be used with
either the standard 5

5 keyboard or

the inexpensive single contact (Form A)
keyboard. Electronic input from a

can also be used.

A valid key-in is defined as a single row
being connected to a single column

XT, XT

7, 8

(8, 9,

W91320LN

only)

8, 9

I, O

A built-in inverter provides oscillation
with an inexpensive 3.579545 MHz
crystal or ceramic resonator.

T/P

MUTE

(10,

W91320LN

only)

The T/P MUTE is a conventional
CMOS N-channel open drain output.

The output transistor is switched on
during dialing sequence, one-key redial
break and flash break time. Otherwise,
it is switched off.

MODE

(14,

W91320LN

only)

Pulling mode pin to V

places the

dialer in tone mode.

Pulling mode pin to V

places the

dialer in pulse mode. (10 ppS; 20 ppS
for W91321N/321AN M/B = 40:60)

Floating mode pin places the dialer in
pulse mode. (10 ppS; 20 ppS for
W91321N/321AN M/B = 33.3:66.7)

HKS

(11,

W91320LN

only)

Hook switch input.

HKS = V

: On-hook state. Chip in

sleeping mode, no operation.

HKS = V

: Off-hook state. Chip is

enable for normal operation.

HKS pin is pulled to V

by internal

resistor.

W91320N SERIES

- 4 -

Pin Description, continued

SYMBOL

18-PIN

20-PIN

22-PIN

I/O

FUNCTION

DP / C5

(12,

W91320LN

only)

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, d).

, V

14, 6

16, 6

(16, 7

W91320LN

only)

18, 7

Power input pins.

H/P

MUTE

(6,

W91320LN

only)

The H/P MUTE is a conventional
inverter output. During pulse dialing,
flash break, one-key redial break, and
hold period, this output is active high;
otherwise, it remains in low state.

(W91320LN

only)

No connection.

DTMF

(13,

W91320LN

only)

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

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

Detailed timing diagram for tone mode
is shown in Figure 2(a, b, c, d).

Specified

Actual

Error %

Output Frequency

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

W91320N SERIES

Publication Release Date: May 1997

- 5 -

Revision A2

Pin Description, continued

SYMBOL

18-PIN

20-PIN

22-PIN

I/O

FUNCTION

HFI,

HFO

10, 11

(W91320AN/

321AN)

11, 12

I, O

Handfree control pins. The handfree
control state is toggled on by a low

pulse on the HFI input pin. The status
of the handfree control state is
described in the following table:

CURRENT STATE

Input

HFO

Dialing

High

Yes

On Hook

High

Low

Off Hook

High

Low

Yes

On Hook

Off Hook

Low

Yes

Off Hook

Low

On Hook

Low

Off Hook

High

On Hook

High

Yes

Low

Hook SW.

HFO

NEXT STATE

HFI

HFI pin is pulled to V

by internal

resistor.

Detailed timing diagrams are shown in
Figure 3(a, b, c).

LOCK

(6,

W91320LN

only)

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.

LOCK PIN

FUNCTION

Floating

Normal dialing mode

"0," "9" dialing inhibited

"0" dialing inhibited

W91320N SERIES

- 6 -

BLOCK DIAGRAM

ROW

COLUMN

DTMF

MODE

RAM

COUNTER

SYSTEM CLOCK

GENERATOR

LOCATION

LATCH

D/A

ROW & COLUMN

PROGRAMMABLE

COUNTER

DATA LATCH

& DECODER

READ/ WRITE

(R1 to R4, Vx)

(C1 to C4)

T/P MUTE

HFO

CONTROL

LOGIC

PULSE

CONTROL

LOGIC

KEYBOARD

INTERFACE

CONVERTER

LOCK

HKS

HFI

DP/C5

H/P MUTE

FUNCTIONAL DESCRIPTION

Keyboard Operation

R/P1

R/P2

R/P1, R/P2: Redial and pause function key, P1 is 3.6 sec. and P2 is 2.0 sec.

/T:

in tone mode and P

T in pulse mode

F1,

...

, F4: Flash keys, the flash break time of F1 = 600 mS, F2 = 100 mS, F3 = 300 mS, F4 = 73

H: Hold function key

R: One-key redial function

Notes: D1, ..., Dn, D1', ..., Dn': 0, ..., 9, */T, #

R/P: R/P1 or R/P2.

Fn: F1, ..., F4

W91320N SERIES

Publication Release Date: May 1997

- 7 -

Revision A2

Normal Dialing

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

1. D1, D2,

...

, Dn will be dialed out.

2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing.

Redialing

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

, Busy,

Come

ON HOOK

OFF HOOK

(or

ON HOOK

HFI

¡õ

R/P

a. The redial memory content will be dialed out.

b. The

R/P

key can execute the redial function only as the first key-in after off-hook; otherwise, it

executes pause function.

c. If redialing length oversteps 32 digits, the redialing function will be inhibited.

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

, Busy,

a. The one-key redialing function timing diagram is shown in Figure 4.

b. If the dialing of

is finished, pressing the

key will cause the pulse output pin to

go low for 2.2 seconds break time and 0.6 seconds pause time will automatically be added.

c. If the pulses of the dialed digits

have not finished,

will be ignored.

d. The redial function by

key has no break time (2.2 sec.) if it is the first key in after off-hook.

e. The

key uses the same redial buffer as the redial function

R/P1

R/P2

key,

and it is actived during normal dialing or repertory dialing.

Access Pause

OFF HOOK

(or

ON HOOK

HFI

¡õ

R/P

, ...,

1. The pause function is executed in normal dialing, redial dialing, or memory dialing.

2. The pause duration of 2.0 or 3.6 seconds per pause is selected by keypad, but only one pause time

can be stored in memory.

3. The detailed timing diagram for the pause function is shown in Figure 5.

Pulse-to-tone (*/T)

OFF HOOK

(or

ON HOOK

HFI

¡õ

, ...,

*/T

D1'

D2'

, ...,

Dn'

W91320N SERIES

- 8 -

1. If the mode switch is set to pulse mode, then the output signal will be:

D1, D2,

...

, Dn, Pause (2.0 sec. or 3.6 sec.), D1', D2',

...

, Dn'

(Pulse)

(Tone )

2. If the mode switch is set to tone mode, then the output signal will be:

D1, D2, ..., Dn, *, D1', D2', ..., Dn'
(Tone)

(Tone)

3. The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse

mode only by going on-hook.

4. The pulse-to-tone function timing diagram is shown in Figure 6.

Flash

OFF HOOK

(or

ON HOOK

HFI

¡õ

1. Fn = F1, ..., F4
2. The dialer will execute flash break time of 600 mS (F1), 100 mS (F2), 300 mS (F3), or 73 mS (F4)

and all the pause time is 1.0 sec. before the next digit is dialed out.

3. Flash key can not be stored as a digit in memory. The flash key has the first priority among

the keyboard functions.

4. The system will return to the initial state after the flash pause time is finished.
5. The flash function timing diagram is shown in Figure 7.

HOLD

OFF HOOK

(or

ON HOOK

HFI

¡õ

The hold function is switched on and off by a toggle switch. The keypad will be disabled when in hold
mode. The function timing diagram is shown in Figure 3(a, b, c).

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

RATING

UNIT

DC Supply Voltage

-0.3 to +7.0

Input/Output Voltage

0.3

+0.3

0.3

+ 0.3

Power Dissipation

120

Operation Temperature

OPR

-20 to +70

Storage Temperature

STG

-55 to +150

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the
device.

W91320N SERIES

Publication Release Date: May 1997

- 9 -

Revision A2

DC CHARACTERISTICS

-V

= 2.5V, F

OSC.

= 3.579545 MHz, T

= 25

C, All outputs unloaded)

PARAMETER

SYM.

CONDITIONS

MIN. TYP.

MAX.

UNIT

Operating Voltage

2.0

5.5

Operating Current

Tone, Unloaded

0.4

0.6

Pulse, Unloaded

0.2

0.4

Standby Current

HKS = V

, No

load & No key
entry

Memory Retention Current

HKS = V

= 1.0V

0.2

DTMF Output Voltage

Row group,

= 5 K

130

150

170

mVrm

Pre-emphasis

Col/Row,

= 2.0 to 5.5V

DTMF Distortion

THD

= 5 K

= 2.0 to 5.5V

-30

-23

DTMF Output DC Level

TDC

= 5 K

= 2.0 to 5.5V

1.0

3.0

DTMF Output Sink Current

= 0.5V

0.2

DP Output Sink Current

= 0.5V

0.5

T/P MUTE Output Sink
Current

TML

TMO

= 0.5V

0.5

H/P MUTE Output

HPH

HPL

= 2.0V

0.5

Drive/Sink Current

HPL

= 0.5V

0.5

HFO Drive/Sink Current

HFH

= 2.0V

0.5

HFL

= 0.5V

0.5

Keypad Input Drive Current

= 0.0V

Keypad Input Sink Current

= 2.5V

200

400

HKS I/P Pull-High Resistor

300

Keypad Resistance

W91320N SERIES

- 10 -

AC CHARACTERISTICS

= 2.5V, F

OSC.

= 3.579545 MHz, T

= 25

C, All outputs unloaded)

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Key-in Debounce

KID

Key Release Debounce

KRD

Off-hook Delay

OFD

Lock only

300

First Key-in Delay

FKD

Lock only

300

Pre-digit-pause

PDP1

Mode = V

10 ppS

Mode = Floating

33.3

Pre-digit-pause

PDP2

Mode = V

20 ppS

Mode = Floating

16.7

Interdigit Pause

IDP

10 ppS

800

(Auto Dialing)

20 ppS

500

Make/Break Ratio

M:B

Mode = V

40:60

Mode = Floating

33.3:66.7

Tone Output Duration

Auto dialing

Intertone Pause

ITP

Auto dialing

600

Flash Break Time

100

300

Flash Pause Time

F1, F2, F3, F4

1.0

Pause Time

R/P1

3.6

R/P2

2.0

One-key Redial Break
Time

2.2

One-key Redial Pause
Time

600

Notes:

1. Crystal parameters suggested for proper operation are Rs < 100

, Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF,

OSC

. = 3.579545 MHz

0.02%.

2. Crystal oscillator accuracy directly affects these times.

W91320N SERIES

Publication Release Date: May 1997

- 11 -

Revision A2

TIMING WAVEFORMS

IDP

HKS

KEY IN

H/P MUTE

T/P MUTE

IDP

KID

IDP

PDP

M B

KRD

< 600 mS

< 300 mS

KID

DTMF

OSC.

Low

OSCILLATION

PDP

Figure 1a. Normal Dialing Timing Diagram (Pulse Mode Without Lock Function)

HKS

KEY IN

H/P MUTE

T/P MUTE

OFD

IDP

PDP

KID

IDP

PDP

M B

KID

KRD

DTMF

OSC.

Low

OSCILLATION

FKD

< 600 mS

< 300 mS

Figure 1b. Normal Dialing Timing Diagram (Pulse Mode with Lock Function)

W91320N SERIES

- 12 -

Timing Waveforms, continued

HKS

KEY IN

H/P MUTE

T/P MUTE

R/P

KID

IDP

PDP

M B

DTMF

OSC.

Low

OSCILLATION

IDP

< 600 mS

KRD

Figure 1c. Auto Dialing Timing Diagram (Pulse Mode Without Lock Function)

HKS

KEY IN

H/P MUTE

T/P MUTE

OFD

IDP

PDP

M B

DTMF

OSC.

Low

OSCILLATION

R/P

KID

IDP

FKD

< 600 mS

300 mS

Figure 1d. Auto Dialing Timing Diagram (Pulse Mode with Lock Function)

W91320N SERIES

Publication Release Date: May 1997

- 13 -

Revision A2

Timing Waveforms, continued

HKS

KEY IN

H/P MUTE

T/P MUTE

DTMF

KID

Low

KRD

< 600 mS

< 300 mS

OSC.

OSCILLATION

ITP

KID

High

ITP

OSCILLATION

KRD

Figure 2a. Normal Dialing Timing Diagram (Tone Mode Without Lock Function)

HKS

KEY IN

H/P MUTE

T/P MUTE

DTMF

KID

Low

KRD

< 600 mS

< 300 mS

OSC.

OFD

OSCILLATION

FKD

ITP

Figure 2b. Normal Dialing Timing Diagram (Tone Mode with Lock Function)

W91320N SERIES

- 14 -

Timing Waveforms, continued

HKS

KEY IN

H/P MUTE

T/P MUTE

DTMF

Low

R/P

KRD

< 600 mS

OSC.

OSCILLATION

ITP

KID

Figure 2c. Auto Dialing Timing Diagram (Tone Mode Without Lock Function)

HKS

KEY IN

H/P MUTE

T/P MUTE

DTMF

Low

R/P

KRD

< 600 mS

300 mS

OSC.

OFD

OSCILLATION

FKD

ITP

Figure 2d. Auto Dialing Timing Diagram (Tone Mode with Lock Function)

W91320N SERIES

Publication Release Date: May 1997

- 15 -

Revision A2

Timing Waveforms, continued

HKS

OFF HOOK

ON HOOK

HFO

H/P MUTE

CHIP ENBLE

Low

High

HFI

H KEY

T/P MUTE

Figure 3a. Handfree and Hold Timing Diagram

Note: The H KEY cannot be enabled when chip is disabled.

T/P MUTE

HFI

HKS

OFF HOOK

HFO

High

H/P MUTE

CHIP ENBLE

H KEY

Figure 3b. Handfree and Hold Timing Diagram

Note: The HFI and H KEY inputs will toggle the HFO signal; as soon as either HFI or H KEY is activated, the HFO signal will go

high and previous activate inputs will be ignored.

W91320N SERIES

- 16 -

Timing Waveforms, continued

T/P MUTE

H KEY

HFI

HKS

ON HOOK

HFO

High

H/P MUTE

CHIP ENBLE

Figure 3c. Handfree and Hold Timing Diagram

Note: Changing the state of the HKS signal from high to low will initialize the HFO and H/P MUTE signals.

HKS

KEY IN

T/P MUTE

DTMF

OSC.

OFD

PDP

Low

OSCILLATION

FKD

< 600 mS

300 mS

KID

PDP

IDP

HFI

HFO

KID

H/P MUTE

Figure 4. One-key Redial Timing Diagram (Pulse Mode)

W91320N SERIES

Publication Release Date: May 1997

- 17 -

Revision A2

Timing Waveforms, continued

HKS

KEY IN

H/P MUTE

T/P MUTE

DTMF

OSC.

Low

OSCILLATION

< 600 mS

KID

R/P

OFD

300 mS

PDP

IDP

PDP

FKD

OSCILLATION

Figure 5. Pause Function Timing Diagram

HKS

KEY IN

H/P MUTE

T/P MUTE

DTMF

OSC.

OSCILLATION

< 600 mS

KID

*/T

OFD

300 mS

PDP

IDP

OSCILLATION

Figure 6. Pulse-to-tone Timing Diagram

W91320N SERIES

Publication Release Date: May 1997

- 19 -

Revision A2

Headquarters

No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: 886-3-5770066
FAX: 886-3-5792697
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-7197006

Taipei Office

11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-7190505
FAX: 886-2-7197502

Winbond Electronics (H.K.) Ltd.

Rm. 803, World Trade Square, Tower II,
123 Hoi Bun Rd., Kwun Tong,
Kowloon, Hong Kong
TEL: 852-27516023
FAX: 852-27552064

Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.

2730 Orchard Parkway, San Jose,
CA 95134, U.S.A.
TEL: 1-408-9436666
FAX: 1-408-9436668

Note: All data and specifications are subject to change without notice.

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