ISD1750SYR

Overview

The ISD1750SYR is a voice record and playback integrated circuit from Nuvoton Technology Corporation's ChipCorder series. It supports multiple messages with durations ranging from 33 to 100 seconds. The device operates on a supply voltage of 2.4 V to 5.5 V and features an internal oscillator. Input signals are analog single-ended or microphone, while output includes analog single-ended and PWM speaker drive. Sampling frequency is adjustable between 4 kHz and 12 kHz. It utilizes button and SPI interfaces for control. The component is housed in a 28-SOIC package (0.295 inch width) and is rated for operating temperatures from -40°C to 85°C TA.

Feature Summary

• Integrated multi-message management system allowing self-managed address locations without external microcontroller intervention.
• Built-in automatic gain control and volume control for optimized audio performance.
• Supports both standalone push-button operation and microcontroller-based SPI interface modes.

Applications

• Standalone voice messaging systems
• Electronic greeting cards
• Toy voice modules

Procurement Notes

Verify the specific suffix 'R' against official datasheets to confirm tape-and-reel packaging status, as distributor listings may vary. Confirm current availability as the ISD1750 series has been subject to obsolescence notices. Cross-reference manufacturer part numbers for active alternatives if stock is limited.

Selection Notes

Select this model when non-volatile storage for up to 100 seconds of voice data is required in a compact surface-mount package. Ensure the application environment stays within the specified -40°C to 85°C temperature range. Verify that the 2.4 V to 5.5 V supply voltage aligns with the system power design.

Part Context

This component belongs to the ISD1700 ChipCorder series, which utilizes Multi-Level Storage technology for high-density voice recording. The ISD1750 variant specifically targets applications requiring moderate message duration flexibility. It is designed to replace older discrete voice solutions by integrating preamplifiers, filters, and Class D drivers on a single chip.

Replacement Considerations

Official manufacturer recommended substitutes include I2361YYI and I3800FYI. These parts offer similar functionality but may differ in package type or specific timing characteristics. Verify pin compatibility and software register mapping before substitution.