ISD4002-180SI

Overview

The ISD4002-180SI is a single-chip voice record/playback device from the ISD4002 series, designed for portable applications. It features 180 seconds of recording duration at a typical sampling frequency of 5.3 kHz and a filter pass band of 2.3 kHz. The device operates on a single 3-volt supply with typical operating currents of 15 mA during playback and 25 mA during recording. Standby current is typically 1 µA. It utilizes an SPI or Microwire interface for control and includes an on-chip oscillator, anti-aliasing filter, smoothing filter, audio amplifier, and high-density multilevel Flash memory array.

Feature Summary

• Single-chip solution integrating analog transceivers, decoders, power conditioning, and nonvolatile multilevel storage array.
• AutoMute feature provides background noise attenuation during playback silence periods.
• Direct analog storage into Flash memory cells without digitization or compression algorithms.
• Fully addressable memory architecture allowing handling of multiple messages via serial interface.

Applications

• Cellular phones
• Portable messaging products
• Microcontroller-based systems requiring voice prompts

Procurement Notes

Verify the specific suffix 'SI' against manufacturer documentation to confirm industrial temperature range (-40°C to +85°C) and package type (SOIC). Ensure compatibility with 3V logic levels and SPI timing requirements. Confirm availability of datasheets for absolute maximum ratings and electrical characteristics prior to integration.

Selection Notes

Select this model when 180 seconds of continuous voice recording is required. Choose based on the trade-off between sampling rate (5.3 kHz) and audio bandwidth (2.3 kHz). Verify that the system can provide the necessary 3V supply and supports the required SPI communication protocol. Consider the industrial temperature rating if operating in harsh environments.

Part Context

The ISD4002 series comprises single-chip voice record/playback devices offering durations of 120, 150, 180, and 240 seconds. These CMOS-based devices are designed for microprocessor or microcontroller systems, utilizing Winbond’s patented multilevel storage technology for direct analog signal storage in Flash memory.

Replacement Considerations

Other models in the ISD4002 series (ISD4002-120, ISD4002-150, ISD4002-240) share the same pinout and interface but offer different recording durations and sampling frequencies. Substitution requires verifying that the alternative duration meets application needs and that the sampling rate matches the system's audio processing expectations.

FAQ

What is the recommended external clock frequency for the ISD4002-180?

If an external clock is used instead of the internal oscillator, the recommended clock frequency for the ISD4002-180 is 682.7 kHz to maintain the specified 5.3 kHz sampling rate.

How does the AutoMute feature function?

The AutoMute feature minimizes background noise by attenuating the output by 6 dB during periods of silence. It uses a peak detector circuit connected to the AM CAP pin to compare signal amplitude against an internal threshold.

What is the memory retention capability of the ISD4002-180SI?

The device provides non-volatile message storage with a typical retention period of 100 years without power. It also supports approximately 100,000 record cycles.