ISD4002-240S

Overview

The ISD4002-240S is a single-chip voice record/playback device from the ISD4002 ChipCorder series, designed for 240-second messaging applications. It operates on a single 3V supply and utilizes multilevel Flash memory to store analog speech samples directly without digitization or compression. The device features an internal oscillator, anti-aliasing filter, smoothing filter, AutoMute feature, and audio amplifier. Control and addressing are managed via a Serial Peripheral Interface (SPI) or Microwire serial interface. Key electrical parameters include a sampling frequency of 4.0 kHz, a typical filter passband of 1.7 kHz, and operating voltage range of 2.7 V to 3.3 V.

Feature Summary

• Direct analog storage in non-volatile Flash memory for high-quality voice reproduction
• AutoMute feature provides background noise attenuation during silence periods
• Fully addressable multiple message handling via SPI or Microwire interface
• Zero-power message storage with long-term retention capabilities

Applications

• Cellular phones and portable products requiring 2-to-4-minute messaging
• Microprocessor-based systems needing simple voice recording and playback
• Applications requiring non-volatile storage for tone and sound effects

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm package type matches design requirements, as the series offers SOIC, PDIP, and TSOP options. Check RoHS compliance status if environmental regulations apply to the target assembly. Ensure power supply decoupling meets datasheet recommendations for stable operation.

Selection Notes

Select this model for applications requiring exactly 240 seconds of recording time at a 4.0 kHz sampling rate. Choose based on required temperature range, as commercial, extended, and industrial variants exist. Consider the external clock requirement if precise timing stability is needed beyond the internal oscillator's tolerance. Verify interface compatibility with the host microcontroller's SPI or Microwire settings.

Part Context

The ISD4002-240S belongs to the ISD4002 series, which includes 120-, 150-, and 180-second duration variants. These devices share the same core architecture, including the multilevel Flash memory array and SPI control interface. The series is designed by Nuvoton Technology Corporation (originally Winbond) for low-power, single-chip voice solutions.

Replacement Considerations

Nuvoton recommends the I3900FYI as a replacement part. Verify pinout and electrical specifications before substitution. Ensure the replacement supports the required 240-second duration and 4.0 kHz sampling rate if those parameters are critical to the application.