ISD4004-12MSIR

Overview

The ISD4004-12MSIR is a single-chip voice record/playback device from Nuvoton's ISD4004 series, designed for portable applications. It utilizes Direct Analog Storage Technology to store audio signals directly in on-chip Flash memory without A/D conversion. The component supports a recording duration of 12 minutes at a sampling frequency of 5.3 kHz and a typical filter pass band of 2.3 kHz. It operates on a single 3V supply with an operating current of 25 mA during recording and 1 µA in standby. The device features a 28-pin SOIC package and communicates via SPI or Microwire interfaces.

Feature Summary

• Direct analog storage technology preserves natural voice quality by storing signals directly in Flash memory without digitization.
• Integrated AutoMute feature attenuates background noise during silence periods to improve audio clarity.
• Supports multiple message management through fully addressable memory rows and interrupt-driven status reporting.

Applications

• Portable consumer electronics requiring localized voice prompts
• Industrial control systems with automated status announcements
• Security alarm systems utilizing recorded warning messages

Procurement Notes

Verify the specific suffix MSIR confirms the 28-SOIC surface-mount packaging and industrial temperature range availability if required. Confirm that the ordering code matches the 12-minute duration variant rather than other durations in the ISD4004 family. Ensure the supplier provides original manufacturer documentation to validate authenticity.

Selection Notes

Select this model when a 12-minute recording capacity is required. Choose the industrial temperature grade (-40°C to +85°C) for harsh environments, noting that commercial grades are limited to 0°C to +70°C. Ensure the host microcontroller supports the necessary SPI timing protocols and can handle the separate analog and digital ground requirements for optimal signal integrity.

Part Context

This component belongs to the ISD4004 ChipCorder series, which offers variable recording times ranging from 8 to 16 minutes. The series shares a common architecture featuring direct analog storage and SPI control. The -12 variant specifically balances audio bandwidth and duration, differing from the -08 (8 min) and -16 (16 min) models in sampling rate and memory allocation.

Replacement Considerations

ISD4004-12M serves as the die-level equivalent. Other durations within the ISD4004 series share identical pinouts and control logic but differ in recording time and sampling rates.