ISD4002-240PY

Overview

The ISD4002-240PY is a single-chip voice record/playback solution from Nuvoton's ISD ChipCorder series, designed for 3-volt portable applications. It provides a typical recording and playback duration of 240 seconds at a sampling frequency of 4.0 kHz. The device utilizes multilevel direct analog storage in on-chip Flash memory, eliminating the need for digital compression algorithms. Key electrical parameters include a typical operating current of 15 mA during playback and 25 mA during recording, with a standby current of 1 µA. It features an SPI or Microwire interface for microcontroller control, an AutoMute noise attenuation feature, and operates within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Direct analog storage technology preserves natural voice quality without digital compression
• Integrated AutoMute feature attenuates background noise during silence periods
• Fully addressable message management via SPI or Microwire serial interfaces
• Non-volatile Flash memory ensures zero-power message retention

Applications

• Portable cellular phones and mobile communication devices
• Industrial equipment maintenance and alarm systems
• Consumer electronic messaging modules

Procurement Notes

Verify the specific suffix PY corresponds to the PDIP package type as listed in the ordering information section of the datasheet. Confirm that the industrial or commercial temperature rating aligns with your system requirements, noting that packaged units are rated for 0°C to +70°C commercially. Ensure external clocking is not required unless higher precision than the internal oscillator allows.

Selection Notes

Select this model when a 240-second duration at 4.0 kHz sampling rate is sufficient for the application. Consider the ISD4002-120, -150, or -180 variants if shorter durations allow for higher sampling frequencies and improved audio bandwidth. Verify that the host microcontroller supports the required SPI or Microwire protocol for command transmission and interrupt handling.

Part Context

The ISD4002-240PY belongs to the ISD4002 series, which offers variable recording times ranging from 120 to 240 seconds. This specific part number denotes the 240-second variant, optimized for longer messages at lower sampling rates. The series shares a common architecture with other members, differing primarily in memory allocation and resulting audio fidelity trade-offs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate other members of the ISD4002 series (ISD4002-120, -150, -180) if duration or sample rate adjustments are acceptable, ensuring pin compatibility remains consistent across the package type.