Voice ICs(260)

IoT Solution(46)


ISD18C00 Series ChipCorder®

With Shared Speaker as MIC

Nuvoton’s ISD18C00 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 (uses shared speaker as microphone) , automatic gain control, anti-aliasing filter, multilevel storage array, smoothing filter, and speaker amplifier. A minimum record/playback subsystem can be configured with 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.


  • Speaker is used as Microphone
  • 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[s1] 
  • Available in die form


 [s1]So No voltage range?