MOSEL VITELIC

1

PID223B 02/95

Features

Single power can operate at 2.4V through 6V.

current output can drive 8 ohm speaker with a

transistor.

Total maximum duration is 2.8 seconds. Speech

+ mute is about 21.8 seconds.

Automatic power down.

Repeat function that can repeat up to 8 times.

CDS interface is provided.

It can not trigger itself by stop pulse.

Mask option for either level or edge trigger type.

Mask

option

for LED

flasher, BUSY

output

or

STOP pulse output.

Mask option for either long (20ms) or short (5ms)

debounce time.

Mask option for either holdable output or not.

Mask option for either

fixed (6Hz) or dynamic

type on LED flasher.

Mask option for either retrigger or not.

General Description

The MSS0287 is a single-chip CMOS LSI that memorizes voice up to 2.8 seconds

using the MOSEL

qualified coding method (MPCM). The chip contains most of the necessary circuit like oscillator, PLA, D/A

converter, buzzer buffer, control and timing logic . Therefore,

it can apply to various voice systems

with

minimum

external

parts.

Several

device can be combined to reach longer

voice duration

(longer

than

2.8 seconds). Customer speech data will be edited and programmed into PLA by changing one mask

during the device fabrication.

OSCILLATOR

ADDRESS

GENERATOR

PLA

D/A

CONTROL LOGIC

OSC

Block Diagram

TG

COUT

LED/BUSY/STOP

VOICE ROM

MSS0287