ISD1750SYIR

Overview

The ISD1750SYIR is a single-chip voice record and playback IC from Nuvoton’s ChipCorder series, housed in a 28-SOIC package. It supports message durations of 33 to 100 seconds with a sampling frequency range of 4 to 12 kHz. The device operates on a supply voltage of 2.4 V to 5.5 V and features an internal oscillator. Interfaces include SPI and button controls, while input signals accept analog single-ended or microphone sources. Output is provided via analog single-ended or PWM speaker drivers. Key features include automatic gain control and volume control, with an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated multi-message management system for self-managing address locations
• Non-volatile storage using patented Multi-Level Storage (MLS) technology
• On-chip microphone preamplifier with Automatic Gain Control (AGC)
• Direct drive capability for speakers or buzzers via Class D PWM output

Applications

• Standalone electronic messaging systems
• Microcontroller-integrated voice prompts
• Battery-operated voice recording devices

Procurement Notes

Verify component status as the ISD1750 series may be subject to End-of-Life notices. Confirm availability through authorized distributors and check for manufacturer-recommended replacements such as the I2361YYI or I3800FYI if current stock is insufficient. Ensure ordering suffixes match required packaging formats like tape and reel.

Selection Notes

Select this model when message duration requirements fall between 33 and 100 seconds. Choose based on the need for SPI interface compatibility or standalone button operation. Consider the 2.4V to 5.5V supply range for battery applications. Verify that the 28-SOIC package fits the PCB layout constraints and that the internal oscillator meets timing accuracy needs without external components.

Part Context

This component belongs to the Nuvoton ISD1700 ChipCorder series, which provides high-quality, fully integrated voice recording solutions. The series is designed for flexibility in duration versus quality by adjusting sampling frequencies. It utilizes proprietary MLS arrays for reliable non-volatile storage, distinguishing it from earlier flash-based voice chips.

Replacement Considerations

Publicly confirmed substitutes include I2361YYI and I3800FYI from Nuvoton Technology Corporation. These are listed as manufacturer-recommended alternatives. Verify pinout and functional compatibility before replacement.