ISD1790EY

Overview

The ISD1790EY is a voice recording and playback integrated circuit manufactured by Nuvoton Technology Corporation. It supports up to 90 seconds of recording time using direct digital storage technology. The component features an internal oscillator, eliminating the need for external clock sources. It operates with a single power supply and includes built-in anti-aliasing filters and DAC reconstruction filters. The device utilizes a serial interface for data transfer and control commands. It is housed in a standard DIP package suitable for through-hole mounting applications.

Feature Summary

• Integrated voice recording and playback functionality within a single chip
• Internal oscillator design reduces external component requirements
• Serial interface support for simplified system integration

Applications

• Voice message modules for consumer electronics
• Automotive warning systems and announcements
• Industrial equipment status alerts

Procurement Notes

Verify the manufacturer designation on the component marking, as Winbond also produces identical pin-compatible parts under the same model number. Confirm the specific suffix indicates the Nuvoton variant if differentiation is required for supply chain management. Check datasheet revisions for any changes in electrical characteristics or recommended operating conditions before finalizing procurement specifications.

Selection Notes

Select this component when a fixed duration voice recording solution is required without complex microcontroller intervention. Ensure the application voltage range matches the specified supply requirements. Consider the DIP package constraints for PCB layout compared to surface-mount alternatives. Verify that the serial interface timing meets the host controller's capabilities for reliable command execution.

Part Context

This part belongs to the ISD1700 series of voice recorders, which are widely used for simple audio storage tasks. The EY suffix typically denotes the package type and temperature grade. These components serve as drop-in replacements for older discrete voice solutions, offering higher reliability and lower power consumption in standalone audio applications.

Replacement Considerations

The ISD1790PYI01 from Winbond is a pin-compatible alternative. Verify electrical parameter equivalence before substitution. Other series members like ISD1760 offer shorter recording times but share similar interfaces.