Voice ICs(260)

IoT Solution(46)


The ISD18A04 is a single-message 4 to 8 seconds record/playback device with wide operating voltage ranging from 2.4 to 5.5V. The device includes an on-chip oscillator, microphone amplifier, multi-level storage array and speaker amplifier. A minimum record/playback subsystem can be configured with a microphone, a speaker, some passive components, push buttons, and a power source. Recordings are stored in on-chip nonvolatile memory cells, providing zero-power 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, and solid-state voice reproduction.


  • Easy-to-use single-chip record/playback solution
  • High quality natural voice/audio reproduction
  • Wide operating voltage: 2.4 - 5.5V
  • Adjustable sampling frequency from 4 to 8 kHz through an external ring resistor
  • Integrated trigger interface for /PLAYE, /PLAYL, and /REC operation
  • Optional Beeping sound effect for recording operation
  • Automatic power down after operation completed
  • Package: Die