ISD1750EYR

Overview

The ISD1750EYR is a fully integrated, single-chip multi-message voice record and playback device from the Nuvoton ChipCorder series. It features non-volatile message storage using patented Multi-Level Storage (MLS) technology. The device supports user-selectable message durations ranging from 33 to 100 seconds and adjustable sampling frequencies between 4 kHz and 12 kHz via an external resistor. Operating voltage spans 2.4 V to 5.5 V, with an internal oscillator and automatic gain control. It interfaces via buttons or SPI and is housed in a 28-TSOP package.

Feature Summary

• Proprietary message management system for self-managing address locations
• Integrated microphone preamplifier with Automatic Gain Control (AGC)
• Pulse Width Modulation (PWM) Class D speaker driver output
• Supports standalone push-button or microcontroller SPI operation

Applications

• Electronic systems requiring simple voice messaging
• Battery-powered applications due to wide voltage range
• Line-powered industrial or consumer devices
• Push-button controlled voice announcement systems

Procurement Notes

The ISD1750EYR is officially listed as obsolete and no longer manufactured by Nuvoton Technology Corporation. Verification of current availability requires checking authorized distributors for remaining stock or approved replacement part numbers such as the I2361YYI or I3800FYI. Designers should confirm end-of-life status and lead times before finalizing procurement plans.

Selection Notes

Select this component when a fixed duration of 33 to 100 seconds is required without external memory. The choice depends on the need for SPI or button interface control and the specific sampling frequency adjustment via external resistor. Ensure the application environment operates within the specified 0°C to 70°C temperature range and utilizes the 28-TSOP surface mount package.

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 recording quality through adjustable sampling rates. The ISD1750EYR specifically targets applications needing multiple message support with non-volatile storage capabilities in a compact form factor.

Replacement Considerations

Publicly confirmed manufacturer-recommended substitutes include the I2361YYI, I3800FYI, and I3900FYI from Nuvoton Technology Corporation. These alternatives should be evaluated for pin compatibility and functional equivalence before integration into existing designs.