ISD17240X

Overview

The Nuvoton ISD17240X is a member of the ISD1700 ChipCorder series, featuring a fully integrated single-chip multi-message voice record and playback solution. It utilizes patented Multi-Level Storage (MLS) technology to store audio data directly in on-chip Flash memory without digital compression. The device supports selectable sampling frequencies from 4 kHz to 12 kHz via an external resistor, enabling message durations ranging up to 240 seconds at 8 kHz. Operating voltage spans 2.4 V to 5.5 V, with industrial temperature options available. It offers dual operating modes: standalone push-button control and SPI interface for microcontroller integration.

Feature Summary

• Integrated message management system supporting standalone push-button operations including record, play, erase, forward, and volume control.
• Dual input channels comprising differential microphone inputs with Automatic Gain Control (AGC) and a single-ended auxiliary analog input.
• Dual output capabilities including a PWM Class D speaker driver for direct speaker connection and a configurable analog current or voltage output.
• Supports both standalone mode with automatic power-down and SPI mode for full user control via Analog Path Configuration registers.

Applications

• Electronic systems requiring high-quality voice messaging
• Industrial control panels with voice feedback
• Consumer appliances with recording capabilities

Procurement Notes

Verify the specific suffix against the official datasheet ordering information table to confirm package type and temperature grade. Ensure the selected variant matches the required message duration and sampling frequency constraints defined by the external oscillator resistor.

Selection Notes

Select the appropriate model based on the required message duration and sampling frequency, which are determined by the external resistor connected to the ROSC pin. Consider the operating environment temperature range when choosing between commercial and industrial variants. Verify that the power supply voltage aligns with the 2.4 V to 5.5 V operating specification.

Part Context

The ISD17240X belongs to the Nuvoton ISD1700 ChipCorder series, which provides high-quality, natural voice reproduction using solid-state memory. This family eliminates compression artifacts associated with traditional digital speech solutions, offering superior audio fidelity for various electronic applications.

Replacement Considerations

Direct replacements within the ISD1700 series may vary in message duration and sampling frequency characteristics. Verify compatibility by comparing the specific suffix parameters and ensuring the alternative part supports the required operational modes and environmental conditions.