ISD4002-120P

Overview

The ISD4002-120P is a single-chip voice record/playback device from the ISD4002 series, designed for portable applications. It features 120 seconds of recording duration at an 8.0 kHz sampling frequency with a typical filter passband of 3.4 kHz. The device operates on a single 3-volt supply, consuming 15 mA during playback and 25 mA during recording, with a standby current of 1 µA. It utilizes non-volatile multilevel Flash memory for zero-power storage, supporting 100,000 record cycles and 100-year retention. Control is managed via SPI or Microwire interfaces.

Feature Summary

• Single-chip solution integrating analog transceivers, filters, audio amplifier, and high-density Flash memory.
• Direct analog storage of voice signals without digitization or compression algorithms.
• AutoMute feature provides background noise attenuation during silence periods.
• Fully addressable memory architecture allowing multiple message handling via serial interface.

Applications

• Cellular phone messaging systems
• Portable electronic devices requiring voice prompts
• Microcontroller-based industrial control panels
• Automotive voice announcement modules

Procurement Notes

Verify the specific suffix indicates the PDIP package type as required by the model designation. Confirm the temperature grade matches the application environment, as commercial packaged units operate between 0°C and +70°C. Ensure the ordering code aligns with the 120-second duration variant to avoid functional mismatches in timing-critical designs.

Selection Notes

Select this component when a fixed 120-second duration at 8.0 kHz sampling rate is required. Choose over higher-duration variants if board space is limited, as all series members share identical pinouts and interfaces. Consider external clocking via XCLK if precise frequency stability beyond ±2.25% is necessary for the specific application environment.

Part Context

This part belongs to the ISD4002 ChipCorder series, which includes 120, 150, 180, and 240-second duration variants. All series members share the same 28-pin package options (PDIP, SOIC, TSOP) and SPI/Microwire interface protocols. The primary differentiator is the sampling frequency and resulting audio bandwidth, which inversely affects the total recording time available in the shared 960K cell memory array.

Replacement Considerations

ISD4002-150P, ISD4002-180P, and ISD4002-240P are direct pin-compatible substitutes within the same series. These alternatives offer longer durations but lower sampling frequencies and narrower audio bandwidths. No other manufacturers' parts are confirmed as electrically equivalent replacements in the provided documentation.