ISD4002-150P

Overview

The ISD4002-150P is a single-chip voice record/playback device from the ChipCorder series, offering a typical recording duration of 150 seconds. It operates on a single 3V supply and utilizes multilevel Flash memory for non-volatile storage with zero-power retention. The device features an internal oscillator, anti-aliasing filter, smoothing filter, AutoMute feature, and audio amplifier. Control is managed via a Serial Peripheral Interface (SPI) or Microwire interface. Key electrical parameters include a sampling frequency of 6.4 kHz, a filter passband of 2.7 kHz, operating current of 15 mA during playback and 25 mA during recording, and standby current of 1 µA. It supports commercial temperature ranges of 0°C to +70°C.

Feature Summary

• Single-chip solution integrating analog transceivers, filters, and high-density multilevel Flash memory for direct analog signal storage.
• AutoMute feature provides background noise attenuation by sensing signal amplitude and applying 6 dB attenuation during silence periods.
• Fully addressable architecture allows handling of multiple messages through SPI or Microwire serial interfaces.
• Non-volatile message storage ensures data retention for up to 100 years without power.

Applications

• Cellular phones and portable messaging devices
• Microcontroller-based systems requiring voice prompts
• Security/Alarm systems
• Temperature Sensor applications

Procurement Notes

Verify component authenticity against manufacturer specifications before integration. Confirm package type matches design requirements, as the ISD4002 series is available in PDIP, SOIC, and TSOP formats. Check for RoHS compliance status if required by local regulations, as some variants may not meet specific environmental standards. Ensure voltage levels align with system power supplies.

Selection Notes

Select the ISD4002-150P when a 150-second recording duration at 6.4 kHz sampling rate is required. Consider the ISD4002-120EIR for shorter durations or different packages. Evaluate thermal requirements carefully, as industrial versions support -40°C to +85°C while commercial versions are limited to 0°C to +70°C. Ensure external clock precision if higher stability than the internal oscillator is needed.

Part Context

The ISD4002 series belongs to Nuvoton's ChipCorder family, designed for low-power voice messaging. It replaces older magnetic storage solutions by providing solid-state reliability. The series includes variants with 120, 150, 180, and 240-second durations, sharing common control interfaces and architectural features like multilevel Flash storage and SPI compatibility.

Replacement Considerations

The ISD4002-150P is marked as obsolete. The I3900FYI is listed as a manufacturer-recommended substitute. Verify pinout compatibility and functional equivalence before replacement. Note that the substitute may have different packaging or updated regulatory compliance status.

FAQ

How does the AutoMute feature function?

The AutoMute feature minimizes background noise during playback by using a peak detector circuit. When no signal is detected, it applies 6 dB of attenuation. A 1 µF capacitor connected to the AM CAP pin sets the trip point and attack time.

What is the maximum input signal level for optimal quality?

In single-ended mode, the maximum input signal is 32 mVp-p. In differential mode, the maximum input signal for both ANA IN+ and ANA IN- is 16 mVp-p.

Can the device be used for playback-only applications?

Yes, the ISD4002 series is ideal for playback-only applications where messages are controlled through the SPI port. Messages can be pre-recorded and duplicated via a programmer.