Voice ICs(260)

IoT Solution(46)


Nuvoton’s ISD1800 ChipCorder® provides high-quality, single chip, single-message, record/playback solution with user-selectable durations of 6 to 16 seconds. The CMOS devices include an on-chip oscillator (with external control) , microphone preamplifier, automatic gain control, anti-aliasing filter, multilevel storage array, smoothing filter, and speaker amplifier. A minimum record/playback subsystem can be configured with a microphone, a speaker, several passive components, two push buttons, and a power source. Recordings are stored in on-chip nonvolatile memory cells, providing zero-power message storage. This unique, single-chip solution is made possible through Nuvoton’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.


Easy-to-use single-chip, single-message voice record/playback solution

High-quality, natural voice/audio reproduction

Push-button interface

  • Playback can be edge- or level-activated

Variable record/playback duration controlled by external resistor selection, which sets sample rate.

Automatic power-down mode

  • Enters standby mode immediately following a record or playback cycle
  • 0.5 µA standby current (typical)

On-chip 8Ω speaker driver

Zero-power message storage

  • Eliminates battery backup circuits

100-year message retention (typical)

100,000 record cycles (typical)

On-chip oscillator

No algorithm development required

Single +3 volt power supply

Available in die form

  • 28-pin 300mil SOIC available for samples only