GENERAL DESCRIPTION
Information Storage Devices’ ISD1810 ChipCorder® provides high-quality, single-chip, single-message, record/playback solution with user-selectable durations of 8 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.

FEATURES
• 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 levelactivated
• Variable record/playback duration controlled
   by external resistor selection which sets sample
   rate.
   8 KHz sample rate = 8 seconds
      6.4 KHz sample rate = 10 seconds
      5.3 KHz sample rate = 12 seconds
      4.0 KHz sample rate = 16 seconds
• Automatic power-down mode
   – Enters standby mode immediately following a record or playback cycle
   – 0.5 µA standby current (typical)
• On-chip 8
speaker driver
• Zero-power message storage
   – Eliminates battery backup circuits
• 100-year message retention (typical)
• 10,000 record cycles (typical)
• On-chip oscillator
• No algorithm development required
• Single +3 volt power supply
• Available in die form and 28-pin 600 mil DIP
   (for sampling only)