ISD17240EYR

Overview

The Nuvoton ISD17240EYR is a single-chip multi-message voice record and playback device from the ISD1700 series. It features an integrated message management system for standalone push-button applications or microcontroller control via SPI. The device supports selectable sampling frequencies of 4 kHz to 12 kHz, determined by an external resistor, which also sets the message duration. For the ISD17240 variant, durations range from 160 seconds at 12 kHz up to 480 seconds at 4 kHz. Operating voltage spans 2.4 V to 5.5 V, with an industrial temperature rating of -40°C to +85°C. Audio inputs include differential microphone with AGC and single-ended analog input, while outputs provide PWM Class D speaker drive and configurable analog output.

Feature Summary

• Integrated message management system enabling standalone operation with automatic power-down after each cycle.
• Dual operating modes supporting both push-button control and full user control via SPI interface.
• On-chip Flash memory storage using Multi-Level Storage technology for high-quality uncompressed audio reproduction.
• Configurable audio paths allowing flexible selection of inputs, outputs, and mixing through the Analog Path Configuration register.

Applications

• Standalone electronic messaging systems requiring simple push-button interfaces.
• Voice-enabled consumer electronics and appliances.
• Industrial control panels with voice feedback requirements.
• Security and alarm systems needing recorded alerts.

Procurement Notes

Verify the specific suffix 'EYR' against official ordering information to confirm package type and temperature grade. Ensure the design accounts for the required external oscillator resistor to set the desired sampling frequency and duration. Confirm that the application circuit follows recommended layout practices for ground separation and power decoupling to maintain audio quality.

Selection Notes

Select this component when long message durations up to 480 seconds are required at lower sampling rates. Compare against other ISD1700 variants based on specific duration needs at different sampling frequencies. Consider the need for SPI control versus standalone operation when designing the interface. Verify compatibility with the target supply voltage range and environmental temperature conditions.

Part Context

The ISD17240EYR belongs to the Nuvoton ISD1700 ChipCorder series, which offers various message duration options. This specific model provides extended recording times compared to shorter-duration variants like the ISD1730 or ISD1760. The series utilizes proprietary Multi-Level Storage technology to store audio data directly in solid-state memory without digital compression.

Replacement Considerations

Other models within the ISD1700 series such as ISD17120 or ISD1760 may serve as alternatives if different message durations are acceptable. Verify pinout compatibility and software command structure if migrating between different ISD1700 variants. Check if the required duration can be met by adjusting the sampling frequency on a different capacity chip.