Product Data Sheets

ISD1000A Series

1–2

GENERAL DESCRIPTION

Information Storage Devices’ ISD1000A Chip-

record/playback solutions for 16- and 20-second

messaging applications. The CMOS devices

include an on-chip oscillator, microphone pream-

plifier, automatic gain control, antialiasing filter,

smoothing filter, and speaker amplifier. In addi-

tion, the ISD1000A Series is fully microprocessor-

compatible, allowing complex messaging and

addressing to be achieved.

Recordings are stored in on-chip nonvolatile

memory cells, providing zero-power message

storage. This unique, single-chip solution is made

possible through ISD's patented multilevel stor-

age technology. Voice and audio signals are

stored directly into memory in their natural form,

providing high-quality, solid-state voice reproduc-

tion.

DETAILED DESCRIPTION

The ISD1000A ChipCorder Series devices are

designed to Record and Play back audio and

voice information in a single chip with a minimum

of circuit complexity. This compact, easy-to-use,

nonvolatile, low-power solution has been made

possible by ISD's multilevel storage technology —

a breakthrough in storage technology in EEPROM.

ISD’s multilevel storage technology results in stor-

age density that is eight times greater than digital

memory. The ISD1000A nonvolatile analog array

consists of 128K cells — the equivalent of 1 Mbits

of digital storage.

The ISD1000A Series eliminates the need for dig-

ital conversion, digital compression, and voice

synthesis techniques which often compromise

voice quality and are more complicated to use.

The ISD1000A Series includes signal conditioning

circuits and control functions which enable a com-

plete, high-quality Recording and Playback sys-

tem in a single device. The ISD1000A is available

in two versions, which store voice in 16- or 20-sec-

ond arrays. Additional devices may be cascaded

ISD1000A SERIES BLOCK DIAGRAM

Amp

Timing

Internal Clock

Pre-

Amp

Power Conditioning

A0

A2 A3 A4 A5

A7

A6

Address Buffers

ANA IN

ANA OUT

MIC

MIC REF

AGC

Analog Transceivers

128 K Cell

Nonvolatile

Multilevel Storage

Array

Amp

Sampling Clock

PD

P/R

CE

EOM

Device Control

XCLK

AUX IN

SP+

SP–

Mux

A1

Automatic

Gain Control

(AGC)

5-Pole Active

Antialiasing Filter

5-Pole Active

Smoothing Filter

R

06.DataBook_1000A Dsht Page 2 Friday, September 27, 1996 10:44 AM