W91460N SERIES

3-MEMORY TONE/PULSE DIALER

WITH SAVE FUNCTION

Publication Release Date: May 1997

- 1 -

Revision A2

GENERAL DESCRIPTION

The W91460N series are Si-gate CMOS ICs that provide the necessary signals for either tone or
pulse dialing. The W91460N series features save memory and 3 by 16-digit automatic dialing
memory.

FEATURES

DTMF/pulse switchable dialer

Two by 32-digit redial and save memory

Three by 16-digit one-touch direct memory

Redial memory cascadable with normal dialing; dialing length is unlimited, but if length exceeds
32-digit the redial function is inhibited

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

Uses 5

5 keyboard

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

Flash, pause, P

T (pulse-to-tone) can be stored as a digit in memory

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

On-hook debounce time: 150 msec.

Minimum tone output duration: 93 msec.

Minimum intertone pause: 93 msec.

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

On-chip power-on reset

Uses 3.579545 MHz crystal or ceramic resonator

Packaged in 18-pin plastic DIP

The different dialers in the W91460N series are shown in the following table:

TYPE NO.

REPLACEMENT

TYPE NO.

PULSE

(ppS)

FLASH

(mS)

PAUSE

(S)

M/B

W91462

W91462N

W91463

600/300/73/100

3.6

W91464

W91465

W91466N

W91466

600/300/73/100

3.6

W91467

W91460N SERIES

- 2 -

PIN CONFIGURATION

T/P MUTE

HKS

DTMF

MODE

PIN DESCRIPTION

SYMBOL

PIN

I/O

FUNCTION

Column-

Row

Inputs

The keyboard inputs may be used with either a standard 5

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

C can also be used.

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

XT, XT

7, 8

I, O

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

T/P

MUTE

The T/P MUTE 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.

MODE

Pulling mode pin to V

places the dialer in tone mode.

Pulling mode pin to V

places the dialer in pulse mode with M/B ratio

40:60 (10 ppS for W91462N and 20 ppS for W91466N).

Floating mode pin places the dialer in pulse mode with M/B ratio
33.3:66.7 (10 ppS for W91462N and 20 ppS for W91466N).

W91460N SERIES

Publication Release Date: May 1997

- 3 -

Revision A2

Pin Description, continued

SYMBOL

PIN

I/O

FUNCTION

HKS

Hook switch input.

HKS = V

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

HKS = V

: Off-hook state. Chip is enabled for normal operation.

HKS pin is pulled to V

by an internal resistor.

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).

, V

14, 6

Power input pins.

DTMF

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).

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

W91460N SERIES

- 4 -

BLOCK DIAGRAM

DTMF

RAM

COUNTER

SYSTEM CLOCK
GENERATOR

LOCATION
LATCH

D/A

ROW & COLUMN
PROGRAMMABLE

COUNTER

DATA LATCH

& DECODER

READ/WRITE

ROW

COLUMN

(R1 to R4, Vx)

(C1 to C5)

T/P MUTE

CONTROL

LOGIC

PULSE

CONTROL

LOGIC

KEYBOARD

INTERFACE

CONVERTER

HKS

MODE

FUNCTIONAL DESCRIPTION

Keyboard Operation

R/P

SAVE

S: Store 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

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

W91460N SERIES

Publication Release Date: May 1997

- 5 -

Revision A2

Normal Dialing

OFF 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.

Redialing

OFF HOOK

, ...,

Busy, Come

ON HOOK

OFF HOOK

R/P

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 the pause function.

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

Number Store

OFF

HOOK

...,

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

will be ignored.

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

OFF HOOK

...,

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

R/P

and

*/T

keys can be stored as a digit in memory. In store
mode,

R/P

is the pause

function key;

*/T

is the pulse to tone function key.

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

Repertory Dialing

OFF HOOK

Access Pause

OFF HOOK

R/P

, ...,

1. The pause function can be stored as a digit in memory.
2. The pause function is executed in normal dialing, redial dialing, or memory dialing.
3. A detailed timing diagram for the pause function is shown in Figure 3.

Pulse-to-tone (*/T)

W91460N SERIES

- 6 -

OFF HOOK

, ...,

*/T

D1'

D2'

, ...,

Dn'

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

D1, D2,

...

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

...

, Dn'

(Pulse)

(Tone )

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

D1, D2, ..., Dn, *, D1', D2', ..., Dn'

(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 4.

Flash

OFF HOOK

1. Fn = F1,

...

, F4

2. The dialer will execute a flash break time of 600 mS (F1), 300 mS (F2), 73 mS (F3), or 100 mS
(F4) In each case, the flash pause time is 1.0 sec. before the next digit is dialed out.

3. Flash key can be stored as a digit in memory; however, only one flash will be released to users.

4. The system will return to the initial state after the flash pause time is finished.

5. The timing diagram of flash function is shown in Figure 5.

Save

OFF HOOK

...,

SAVE

1. If the dialing
of

is finished, pressing the

SAVE

key will cause D1 to Dn to

be copied to the save memory.

OFF HOOK

SAV

2. D1 to Dn will be dialed out after the save key is pressed.

Cascaded Dialing

1. Normal Dialing

Repertory Dialing

Normal Dialing

Repertory Dialing

Normal Dialing

Repertory Dialing

Redialing

Normal

Repertory Dialing

W91460N SERIES

- 8 -

ABSOLUTE MAXIMUM RATINGS

PARAMETER

SYMBOL

RATING

UNIT

DC Supply Voltage

-0.3 to +7.0

-0.3

Input/Output Voltage

+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.

DC CHARACTERISTICS

= 2.5V, F

OSC.

= 3.579545 MHz, T

= 25

C, All outputs unloaded)

PARAMETER

SYMBOL

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,
R

= 5 K

130

150

170

mVrms

Pre-emphasis

Col/Row,
V

= 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

TMO

= 0.5V

0.5

W91460N SERIES

Publication Release Date: May 1997

- 9 -

Revision A2

DC Characteristics, continued

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Keypad Input Drive Current

= 0.0V

Keypad Input Sink Current

= 2.5V

200

400

HKS I/P Pull-high Resistor

300

Keypad Resistance

5.0

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

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

300

100

Flash Pause Time

F1, F2, F3, F4

1.0

Pause Time

3.6

On-hook Debounce Time

OHD

150

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.

W91460N SERIES

- 10 -

TIMING WAVEFORMS

IDP

HKS

KEY IN

IDP

KID

IDP

PDP

M B

KRD

KID

PDP

T/P MUTE

DTMF

OSC.

Low

OSCILLATION

Figure 1(a) Normal Dialing Timing Diagram

HKS

KEY IN

T/P MUTE

R/P

KID

IDP

PDP

M B

DTMF

OSC.

Low

OSCILLATION

IDP

KRD

T<T

OHD

Figure 1(b) Pulse Mode Auto Dialing Timing Diagram

W91460N SERIES

Publication Release Date: May 1997

- 11 -

Revision A2

Timing Waveforms, continued

HKS

KEY IN

T/P MUTE

R/P

KID

IDP

PDP

M B

DTMF

OSC.

Low

OSCILLATION

KRD

OHD

Figure 1(c) Pulse Mode Auto Dialing Timing Diagram

HKS

KEY IN

T/P MUTE

DTMF

OSC.

OSCILLATION

ITP

KID

High

ITP

OSCILLATION

KRD

Figure 2(a) Tone Mode Normal Dialing Timing Diagram

W91460N SERIES

- 12 -

Timing Waveforms, continued

HKS

KEY IN

DTMF

R/P

KRD

OSC.

OSCILLATION

ITP

KID

High

T/P MUTE

T<T

OHD

Figure 2(b) Tone Mode Auto Dialing Timing Diagram

HKS

KEY IN

DTMF

R/P

KRD

OSC.

OSCILLATION

ITP

KID

High

T/P MUTE

OHD

Figure 2(c) Tone Mode Auto Dialing Timing Diagram

W91460N SERIES

Publication Release Date: May 1997

- 13 -

Revision A2

Timing Waveforms, continued

HKS

KEY IN

T/P MUTE

DTMF

OSC.

Low

OSCILLATION

KID

R/P

PDP

IDP

PDP

Figure 3. Pause Function Timing Diagram

HKS

KEY IN

T/P MUTE

DTMF

OSC.

OSCILLATION

KID

*/T

PDP

IDP

Figure 4. Pulse-to-tone Timing Diagram

W91460N SERIES

- 16 -

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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