the isd4004 chipcorder® products provide highquality,
3-volt, single-chip record/playback solutions
for 8- to 16-minute messaging applications
which are ideal for cellular phones and other portable
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 microprocessor-
or microcontroller-based system. address
and control are accomplished through a
serial peripheral interface (spi) or microwire serial
interface to minimize pin count.