W91310 SERIES

TONE/PULSE DIALER WITH

REDIAL FUNCTION

Publication Release Date: January 1995

- 1 -

Revision A3

GENERAL DESCRIPTION

The W91310 series are monolithic ICs that provide the necessary signals for either pulse or tone
dialing. The W91310 series feature a redial memory.

FEATURES

DTMF/Pulse switchable dialer

32 digits for redial memory

Pulse-to-tone (P

T) keypad for long distance call operation

Break/Make ratio is selectable by pin option

Uses 4

4 keyboard

Easy operation with redial, flash, pause, and P

T keypads

Flash, pause, P

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

Minimum tone output duration: 100 mS

Minimum intertone pause: 100 mS

On-chip power-on reset

Uses 3.579545 MHz crystal or ceramic resonator

Packaged in 18-pin plastic DIP

The different dialers in the W91310 series are shown in the following table:

TYPE NO.

PULSE (ppS)

FLASH (mS)

FLASH PAUSE (mS)

PAUSE (S)

W91312/A

10/20

600/300

2.0

W91314/A

10/20

73/100

140/100

3.6

W91316

10/20

600

3.6

W91310 SERIES

- 2 -

PIN CONFIGURATION

DTMF

T/P MUTE

MODE

B/M

HKS

PIN DESCRIPTION

SYMBOL

PIN

I/O

FUNCTION

Column-

Row Inputs

The keyboard input may be from either the standard 4

4 keyboard

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

C can also be used. A valid key entry 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 pulse and tone
mode dialing sequence and flash break. 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 (10 ppS). Leaving

mode pin floating places the dialer in pulse mode (20 ppS).

HKS

Hook switch input. HKS = 1: On-hook state. Chip in sleeping mode,
no operation. HKS = 0: Off-hook state. Chip enabled for normal
operation. The HKS pin is pulled to V

by an internal resistor.

W91310 SERIES

Publication Release Date: January 1995

- 3 -

Revision A3

Pin Description, continued

SYMBOL

PIN

I/O

FUNCTION

N-channel open drain dialing pulse output (Figure 1). Flash key will
cause DP to go active in both pulse mode and tone mode.

DTMF

In pulse mode, remains in low state at all times. In tone mode,
outputs a dual or single tone. Detailed timing diagram for tone
mode is shown in Figure 2(a, b).

OUTPUT FREQUENCY

Specified

Actual

Error %

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

, V

14, 6

Power input pins.

B/M

The break make ratio is 60:40 if B/M = 1 and is 66.6:33.3 if B/M =
0. This pin has no function in DTMF mode.

W91310 SERIES

- 4 -

BLOCK DIAGRAM

HKS

T/P MUTE

COLUMN

ROW

XT XT

(R1 to R4)

DTMF

SYSTEM CLOCK
GENERATION

READ/WRITE
COUNTER

RAM

LOCATION
LATCH

ROW & COLUMN
PROGRAMMABLE
COUNTER

DATA LATCH
& DECODER

KEYBOARD
INTERFACE

(C1 to C4)

D/A

CONVERTER

PULSE
CONTROL
LOGIC

CONTROL

LOGIC

MODE

B/M

FUNCTIONAL DESCRIPTION

Keyboard Operation

R/P

F: Flash key

R/P: Redial and pause function key

T: Pulse mode to tone mode

Normal Dialing

OFF HOOK

, ...,

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

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

W91310 SERIES

Publication Release Date: January 1995

- 5 -

Revision A3

Redialing

OFF HOOK

, ...,

BUSY, COME

ON HOOK

OFF HOOK

R/P

The

R/P

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

execute pause function.

Access Pause

OFF HOOK

R/P

, ...,

1. The pause function can be stored in memory.

2. The pause function is executed in normal dialing or memory dialing.

3. The pause function timing diagram is shown in Figure 3.

Pulse-to-tone (P

OFF HOOK

, ...,

D1'

D2'

, ...,

Dn'

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

D1, D2, ..., Dn, Pause, D1', D2', ..., Dn'

(Pulse)

(Tone)

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

D1, D2, ..., Dn,

(Tone)

(Pause)

(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 P

T function timing diagram is shown in Figure 4.

Flash

OFF HOOK

1. Flash key can be stored as a digit in memory.

2. The system will return to the initial state after the break time is finished.

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

W91310 SERIES

- 6 -

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

Operating Temperature

OPR

-20 to +70

Storage Temperature

STG

-55 to +125

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

of the device.

DC CHARACTERISTICS

-V

= 2.5V, Fosc. = 3.58 MHz, T

= 25

C, all outputs unloaded)

PARAMETER

SYM.

CONDITIONS

MIN. TYP. MAX.

UNIT

Operating Voltage

2.0

5.5

Operating Current

Tone

0.3

0.5

Pulse

0.15

0.3

Standby Current

HKS = 0, No load,
& No key entry

Memory Retention
Current

HKS = 1, V

= 1.0V

0.2

DTMF Output Voltage

Row group, R

= 5 K

130

150

170

mVrm

Pre-emphasis

Col/Row, V

= 2.0 to 5.5V

DTMF Distortion

= 5 K

, V

= 2.0 to 5.5V

-30

-23

DTMF Output DC Level

TDC

= 5 K

, V

= 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

= 0.5V

0.5

HKS I/P Pull-high
Resistor

300

W91310 SERIES

Publication Release Date: January 1995

- 7 -

Revision A3

DC Characteristics, continued

PARAMETER

SYM.

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Keypad Input Drive Current

= 0V

Keypad Input Sink Current

= 2.5V

200

400

Keypad Resistance

5.0

AC CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Keypad Active in Debounce

KID

Key Release Debounce

KRD

Pre-digit Pause

PDP

B/M = 1

10 ppS

B/M = 0

33.3

Pre-digit Pause

PDP

B/M = 1

20 ppS

B/M = 0

16.7

Interdigit Pause (Auto
dialing)

IDP

10 ppS

800

20 ppS

500

Make/Break Ratio

M/B

B/M = 1

40:60

B/M = 0

33:67

DTMF Output Duration

Auto Dialing

100

Intertone Pause

ITP

Auto Dialing

100

Flash Break Time

W91314

W91314A

100

W91312A

300

W91312/W91316

600

Flash Pause Time

W91314A

100

W91314

140

W91312A

300

W91312/W91316

600

Pause Time

W91312

2.0

W91314/A/W9131
6

3.6

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.

W91310 SERIES

- 8 -

TIMING WAVEFORMS

HKS

KEY IN

T/P MUTE

PDP

IDP

OSCILLATION

NORMAL DIALING

DTMF

OSC.

LOW

OSCILLATION

KID

Figure 1(a). Pulse Mode Timing Diagram

HKS

KEY IN

R/P

T/P MUTE

PDP

IDP

OSCILLATION

AUTO DIALING

DTMF

OSC.

ON HOOK

LOW

Figure 1(b). Pulse Mode Timing Diagram

W91310 SERIES

Publication Release Date: January 1995

- 9 -

Revision A3

TIming Waveforms, continued

HKS

KEY IN

T/P MUTE

DTMF

KID

KRD

ITP

KRD

ITP

KID

ITP

OSCILLATION

NORMAL DIALING

OSCILLATION

OSC.

HIGH

Figure 2(a). Tone Mode Timing Diagram

R/P

HKS

KEY IN

DTMF

T/P MUTE

KID

ITP

HIGH

OSCILLATION

OSC.

Figure 2(b). Tone Mode Auto Dialing Timing Diagram

W91310 SERIES

- 10 -

TIming Waveforms, continued

HKS

KEY IN

T/P MUTE

KID

PDP

IDP

OSCILLATION

DTMF

OSC.

R/P

IDP

LOW

Figure 3. Pause Function Timing Dragram

HKS

KEY IN

T/P MUTE

KID

PDP

IDP

OSCILLATION

DTMF

OSC.

Figure 4. Pulse-to-tone Function Timing Dragram

W91310 SERIES

Publication Release Date: January 1995

- 13 -

Revision A3

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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