W9145 SERIES

15-MEMORY TONE/PULSE DIALER WITH LOCK

AND HANDFREE FUNCTIONS

Publication Release Date: August 1996

- 1 -

Revision A4

GENERAL DESCRIPTION

The W9145 series are Si-gate CMOS ICs that provide the necessary signals for either pulse or tone
dialing. The W9145 series feature a key tone function, handfree dialing, a lock function, thirteen 16-
digit automatic dialing memories, and two by 32-digit for redial and save memory.

FEATURES

DTMF/Pulse switchable dialer

Two by 32 digits for redial and save memory

Three by 16 digits for one-touch direct repertory

Ten by 16 digits for two-touch indirect repertory

Unlimited dialing length (redial inhibited if dialing length exceeds 32 digits in normal dialing)

Auto Pause Access for PBX and toll service operations (3.1 seconds per pause)

Easy operation with redial, store, auto and pause keypads

Key tone output for recognition of valid keypad entry

Call disconnect (CD) key for line break operation

Mute key for speech mute

Flash time: 98 mS, 305 mS or 600 mS

Minimum tone output duration: 93 mS

Minimum intertone pause: 93 mS

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

Automatic switching from pulse mode to tone mode by */T key operation

Break/make ratio pin selectable

Uses Form A keyboard or standard 5

5 matrix keyboard

Uses inexpensive 3.579545 MHz television color-burst crystal

Internally generated power-on reset

Packaged in 22/24-pin DIP

The different dialers in the W9145 series are shown in the following table:

TYPE NO.

PULSE (ppS)

FLASH

B/M

HANDFREE

LOCK

W9145

98/305/600

W9145A

98/305/600

Yes

W9145L

98/305/600

Yes

W9145AL

98/305/600

Yes

PIN CONFIGURATIONS

W9145 SERIES

- 2 -

DTMF

HKS

T/P MUTE

DP/C5

TEST

MODE

X MUTE

HFO

B/M

HFI

W9145A

DTMF

HKS

T/P MUTE

DP/C5

TEST

MODE

X MUTE

B/M

W9145

DTMF

HKS

T/P MUTE

DP/C5

LOCK

MODE

X MUTE

HFO

B/M

HFI

W9145AL

DTMF

HKS

T/P MUTE

DP/C5

LOCK

MODE

X MUTE

B/M

W9145L

PIN DESCRIPTION

W9145 SERIES

Publication Release Date: August 1996

- 3 -

Revision A4

SYMBOL

22-PIN

24-PIN

I/O

FUNCTION

Column-
Row
Inputs

Keyboard inputs may be connected to either a standard
keyboard, an inexpensive signal contact (Form A)
keyboard, or electronic input from a

C. A valid key entry

is defined by a single row being connected to a single
column.

XT,

6, 7

I, O

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

T/P

MUTE

The T/P MUTE is a conventional CMOS inverter that
pulls to V

in the absence of keypad input and pulls to

when an address keypad entry is sensed (excluding

the * and # keypads in pulse mode). When any keypad in
row 5 and column 5 is pushed, the mute out remains at
high level.

MODE

Pull to V

to enable tone mode. Pull to V

to enable

pulse mode (10 ppS).

HKS

Hook switch input. When pulled to high, chip is in on-hook
state (no operation). When pulled to low, chip is in off-
hook state (enabled for normal operation). This pin is
pulled to V

by internal resistor.

Note: This pin operates in conjunction with the handfree
control pins; for further information see description of
handfree control pins below.

B/M

B/M = 1: Break/Make ratio is 60:40.

B/M = 0: Break/Make ratio is 67:33.

This pin has no function in tone mode.

17, 5

19, 5

Power input pins.

X MUTE

The X MUTE is a conventional CMOS inverter that in tone
mode is active while a DTMF signal is being transmitted.
In pulse mode, this output remains low at all times.

W9145 SERIES

- 4 -

Pin Description, continued

SYMBOL

22-PIN

24-PIN

I/O

FUNCTION

HFI

HFO

12, 13

I, O

Handfree control pins.

A low pulse on

HFI

toggles on the handfree control state.

Status of the handfree control state is indicated in the
following table:

HOOK SW.

On Hook

Off Hook

On Hook

Off Hook

CURRENT STATE

NEXT STATE

HFO

Low

High

Low

High

INPUT

HFI

Off Hook

On Hook

HFO

High

Low

High

DIALING

Yes

HFI

pin is pulled to V

by internal resistor.

Key tone signal output. A 1.2 KHz key tone will be
generated when any key is depressed in pulse mode or
when function keys are depressed in tone mode.

LOCK

(

W9145L

only

)

(

W9145AL

only)

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

Normal dialing mode

"0," "9" dialing inhibited

"0" dialing inhibited

Floating

TEST

(W9145

only)

(

W9145A

only)

During normal operation, the TEST pin should be tied to
V

, thereby inhibiting the single tone and setting the

pulse rate to 10 ppS.

This pin is a CMOS inverter output.

The timing diagram is shown in Figure 1. Flash key will

cause

to go active in either pulse or tone mode.

W9145 SERIES

Publication Release Date: August 1996

- 5 -

Revision A4

Pin Description, continued

SYMBOL

22-PIN

24-PIN

I/O

FUNCTION

DTMF

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

OUTPUT FREQUENCY (Hz)

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

BLOCK DIAGRAM

HKS

MODE

X MUTE

HFO

HFI

COLUMN

ROW

DP/C5

(R1 to R5)

(C1 to C4)

DTMF

READ/WRITE
COUNTER

RAM

LOCATION
LATCH

ROW & COLUMN
PROGRAMMABLE
COUNTER

D/A CONVERTER

DATA LATCH
& DECODER

SYSTEM CLOCK
GENERATOR

T/P MUTE

LOCK

TEST

CONTROL
LOGIC

PULSE
CONTROL
LOGIC

KEYBOARD
INTERFACE

B/M

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