ISD4002-150SIR

Overview

The ISD4002-150SIR is a single-chip voice record/playback device from the ISD4002 series, offering a recording duration of 150 seconds. It operates on a single 3V supply and features an internal oscillator with a sampling frequency of 6.4 kHz. The device utilizes multilevel Flash memory for non-volatile storage and communicates via a Serial Peripheral Interface (SPI). It includes an AutoMute feature for noise attenuation and supports multiple message handling. The component is housed in a 28-pin Thin Small Outline Package (TSOP) and is designed for commercial temperature ranges.

Feature Summary

• Single-chip solution integrating analog transceivers, filters, and multilevel Flash memory
• Direct analog storage without digitization or compression for high-quality reproduction
• AutoMute feature provides background noise attenuation during silence periods
• Fully addressable architecture supporting multiple messages via SPI interface

Applications

• Cellular phones and portable messaging devices
• Microcontroller-based systems requiring voice prompts
• Industrial control panels with audio feedback
• Consumer electronics with recorded announcements

Procurement Notes

Verify the specific suffix 'SIR' against the manufacturer's official ordering guide to confirm package type and temperature grade. Ensure compatibility with the required SPI protocol and voltage levels. Check for end-of-life status or alternative recommendations from Nuvoton Technology Corporation before finalizing procurement plans.

Selection Notes

Select this model when a 150-second duration at 6.4 kHz sampling rate is required. Consider the TSOP package for surface-mount applications. Verify that the system can provide the necessary 3V supply and SPI interface. Evaluate if the internal oscillator stability meets the application's timing requirements or if an external clock via XCLK is needed.

Part Context

The ISD4002 series belongs to Nuvoton's ChipCorder family, designed for low-power voice applications. It uses patented multilevel storage technology to store analog signals directly in Flash memory. The series offers various durations (120s, 150s, 180s, 240s) and interfaces, targeting portable consumer electronics and industrial messaging systems.

Replacement Considerations

Check Nuvoton's official documentation for recommended replacements if the ISD4002-150SIR is discontinued. Potential alternatives may include other members of the ISD4002 series with different durations or packages, such as ISD4002-120 or ISD4002-180 variants, provided they meet the electrical and functional requirements.

FAQ

What is the maximum input signal level for optimal recording quality?

In single-ended mode, the maximum input signal should be 32 mVp-p. In differential mode, it should be 16 mVp-p.

How does the AutoMute feature work?

The AutoMute feature attenuates background noise by 6 dB during periods of silence. It uses a peak detector circuit connected to the AM CAP pin to sense signal amplitude and adjust attenuation accordingly.

Can the device operate without an external clock?

Yes, the ISD4002-150SIR has an internal oscillator. However, for greater precision, an external clock can be applied to the XCLK pin.