ISD4004-08MSI

Overview

The ISD4004-08MSI 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 voice signals in on-chip Flash memory without A/D conversion. The '08' variant provides an 8-minute recording duration at an 8.0 kHz sampling frequency with a typical filter passband of 3.4 kHz. It operates on a single 2.7V to 3.3V supply, drawing 15 mA during playback and 25 mA during recording, with a standby current of 1 µA. The component supports SPI or Microwire interfaces and is available in SOIC-28 packaging.

Feature Summary

• Direct analog storage preserves natural voice quality without digital compression artifacts
• Integrated AutoMute feature attenuates background noise during silence periods
• Non-volatile Flash memory retains data for up to 100 years without power
• Supports message cueing and fully addressable multi-segment management

Applications

• Portable consumer electronics requiring voice prompts
• Microcontroller-based messaging systems
• Automated announcement modules
• Low-power voice recording devices

Procurement Notes

Verify the specific ordering suffix MSI confirms the SOIC-28 package type and lead-free compliance as specified in the datasheet. Confirm the temperature grade matches the application requirements, noting that packaged units are available in commercial (0°C to +70°C) and industrial (-40°C to +85°C) ranges. Ensure the source document explicitly identifies the manufacturer as Nuvoton Technology Corporation.

Selection Notes

Select the ISD4004-08MSI when an 8-minute duration at 8.0 kHz sampling rate is required. Choose this part over other series variants if the specific 3.4 kHz bandwidth is sufficient for the application. Verify that the system can accommodate the separate analog and digital ground requirements and that the microcontroller supports the necessary SPI protocol timing.

Part Context

The ISD4004 series represents Nuvoton's ChipCorder technology, evolving from earlier ISD products. This series integrates the oscillator, filters, and audio amplifier on a single CMOS chip. The ISD4004-08MSI specifically denotes the 8-minute duration model in the Small Outline Integrated Circuit (SOIC) package with the MSI suffix indicating the specific pinout and thermal characteristics defined by the manufacturer.

Replacement Considerations

ISD4004-08MP: PDIP-28 package equivalent. ISD4004-08ME: TSOP-28 package equivalent. These parts share identical electrical specifications and functionality but differ in physical footprint and mounting style.