ISD17240SY

Overview

The Nuvoton ISD17240SY is a single-chip multi-message voice record and playback device from the ISD1700 ChipCorder series. It features an integrated message management system allowing standalone push-button operation or microcontroller control via SPI. The device supports selectable sampling frequencies of 4 kHz to 12 kHz, determined by an external oscillator resistor, which also sets the message duration. For the ISD17240 variant, the maximum recording duration reaches up to 480 seconds at 4 kHz. Operating voltage ranges from 2.4 V to 5.5 V. It includes a differential microphone input with Automatic Gain Control (AGC), a single-ended auxiliary analog input, and dual output channels comprising a PWM Class D speaker driver and a configurable analog output.

Feature Summary

• Integrated message management system for standalone push-button applications
• Dual operating modes: Standalone and SPI interface
• Selectable sampling frequency controlled by external resistor
• On-chip Flash memory for non-volatile storage

Applications

• Standalone electronic systems requiring voice prompts
• Microcontroller-based voice messaging devices
• Battery-powered audio notification systems

Procurement Notes

Verify the specific suffix 'SY' against the manufacturer's current ordering information to confirm package type and temperature grade. Confirm availability status as product lifecycles may change. Ensure the external oscillator resistor value matches the desired sampling frequency configuration before procurement.

Selection Notes

Select this component when a high-quality, uncompressed voice recording solution is required without external compression chips. Choose based on the required message duration; the ISD17240 offers longer recording times compared to lower-capacity variants in the ISD1700 series. Verify that the 2.4V to 5.5V supply range aligns with the target application's power architecture.

Part Context

The ISD17240SY belongs to the Nuvoton ISD1700 ChipCorder series, which utilizes patented Multi-Level Storage (MLS) technology. This series provides fully integrated voice recording and playback capabilities on a single chip, eliminating the need for separate flash memory or DSP components for basic voice functions.

Replacement Considerations

Other models within the ISD1700 series, such as ISD1730, ISD1760, or ISD17120, offer similar functionality but with different maximum message durations. Selection depends on whether the shorter or longer recording times of these alternatives meet the specific application requirements.