ISD4002-150PY

Overview

The ISD4002-150PY is a single-chip voice record and playback solution from the Nuvoton ISD4002 ChipCorder series. It provides 150 seconds of recording duration at a sampling frequency of 6.4 kHz with a typical filter passband of 2.7 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 features an SPI interface for microcontroller control, AutoMute functionality, and non-volatile Flash storage capable of 100,000 record cycles. The component is housed in a 28-pin PDIP package.

Feature Summary

• Single-chip architecture integrating analog transceivers, filters, amplifier, and multilevel Flash memory
• Direct analog storage technology for high-quality natural voice reproduction without digitization
• AutoMute feature providing background noise attenuation during silence periods
• Fully addressable message management via SPI or Microwire serial interface

Applications

• Portable consumer electronics requiring brief messaging capabilities
• Microcontroller-based systems needing non-volatile audio storage
• Industrial or commercial devices utilizing direct analog voice transmission

Procurement Notes

Verify the specific ordering suffix 'P' confirms the PDIP package type and 'Y' indicates lead-free compliance. Confirm the commercial temperature range specification matches the application environment requirements. Ensure the external clock pin configuration aligns with the internal oscillator settings if precise timing stability is required for the system design.

Selection Notes

Select this model when a 150-second duration at 6.4 kHz sampling rate is required. Consider the ISD4002-120EIR for higher quality at 8.0 kHz or the ISD4002-180/240 for longer durations at lower sample rates. Verify that the host microcontroller supports the necessary SPI protocol and voltage levels for seamless integration.

Part Context

The ISD4002-150PY belongs to the ISD4002 ChipCorder series, which offers durations ranging from 120 to 240 seconds. This series utilizes Nuvoton's patented multilevel storage technology to store voice signals directly in Flash memory. The family is designed for low-power, single-supply applications where high-fidelity voice reproduction is essential.

Replacement Considerations

The ISD4002-150P is a direct functional equivalent within the same series. Check datasheet revisions for any changes in operating conditions or electrical characteristics before substitution.

FAQ

How does the AutoMute feature function?

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

What is the recommended input signal level for optimal quality?

For single-ended input mode, a maximum of 32 mVp-p should be capacitively coupled to the ANA IN+ pin. In differential mode, the maximum input signal should be 16 mVp-p.

Can the device operate with an external clock?

Yes, while configured with an internal oscillator at the factory, the XCLK pin allows for an external clock input (819.2 kHz for the -150 variant) to achieve greater frequency precision over temperature and voltage ranges.