ISD1730EYIR

Overview

The ISD1730EYIR is a member of the Nuvoton ISD1700 ChipCorder series, a fully integrated single-chip multi-message voice record and playback device. It utilizes patented Multi-Level Storage (MLS) technology for non-volatile message storage in on-chip Flash memory without digital compression. The device supports user-selectable message durations ranging from 26 to 120 seconds and adjustable sampling frequencies from 4 kHz to 12 kHz via an external resistor. Operating voltage spans 2.4 V to 5.5 V. It features dual operating modes: Standalone (Push-Button) and SPI mode for microcontroller control. Key components include a microphone preamplifier with Automatic Gain Control (AGC), auxiliary analog input, PWM Class D speaker driver, and configurable analog output.

Feature Summary

• Integrated message management system allowing self-managed address locations for multiple messages in a simple push-button environment.
• Dual operating modes supporting standalone operation with automatic power-down or full microcontroller control via SPI interface.
• High-quality audio reproduction using direct solid-state memory storage without digital compression, featuring MLS technology.
• Built-in audio processing including microphone preamplifier with AGC, anti-aliasing filter, smoothing filter, and volume control.

Applications

• Electronic systems requiring high-quality voice recording and playback with minimal component count.
• Battery-powered applications optimized by low voltage operation and automatic power-down features.
• Microcontroller-based systems utilizing SPI mode for sophisticated messaging flexibility and random access.
• Devices requiring push-button controlled voice prompts, announcements, or interactive responses.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm package type, temperature range, and lead-free status. Ensure the selected variant matches the required message duration and sampling frequency configuration for your application design.

Selection Notes

Select the ISD1730EYIR based on the required message duration and sampling frequency. The '30' indicates a maximum duration of approximately 30 seconds at 8 kHz or 20 seconds at 12 kHz. Choose the SOIC package for surface mount applications. Configure the external oscillator resistor to set the desired sampling frequency, balancing recording quality against total message duration.

Part Context

The ISD1730EYIR belongs to the ISD1700 ChipCorder series, which offers a range of devices with varying message durations (ISD1720, ISD1730, ISD1760, etc.). This series is designed for versatile voice applications, providing a complete solution with integrated ADC, DAC, amplifiers, and flash memory in a single chip.

Replacement Considerations

Compatible substitutes within the same family include ISD1720, ISD1760, and ISD17120, depending on the required message duration. Ensure the replacement part supports the same SOIC package and operating voltage range. Verify that the new part's duration specifications meet the application requirements when selecting a different sampling frequency.