Single-Chip Voice Record/Playback Devices
8-, 10-, 12-, and 16-Minute Durations
ISD4004 Series
GENERAL DESCRIPTION
The ISD4004 ChipCorder
®
Products provide high-
quality, 3-volt, single-chip record/playback solu-
tions for 8- to 16-minute messaging applications
which are ideal for cellular phones and other por-
table products. The CMOS-based devices include
an on-chip oscillator, antialiasing filter, smoothing
filter, AutoMute™ feature, audio amplifier, and
high density, multilevel Flash storage array. The
ISD4004 series is designed to be used in a micro-
processor- or microcontroller-based system. Ad-
dress and control are accomplished through a
Serial Peripheral Interface (SPI) or Microwire Serial
Interface to minimize pin count.
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 storage
technology. Voice and audio signals are stored
directly into memory in their natural form, providing
high-quality, solid-state voice reproduction.
Figure: ISD4004 Series Block Diagram
August 2000
ISD/Winbond · 2727 North First Street, San Jose, CA 95134 · TEL: 408/943-6666 · FAX: 408/544-1787 · http://www.isd.com
WINBOND [ WINBOND ]
