ISD2548SY

Voice Record And Playback Overview

The ISD2548SY is a single-chip, multiple-message voice record and playback device from the Winbond ISD2500 series. It provides a recording duration of 48 seconds using on-chip nonvolatile multilevel storage array technology. The device operates with a single 5V power supply and includes an internal oscillator, microphone preamplifier, automatic gain control, and speaker amplifier. It supports microcontroller interfaces for complex addressing and manual switch operation. The component is available in SOIC or PDIP packages and features zero-power message storage with high retention capabilities.

Voice Record And Playback Feature Summary

• Single-chip solution integrating analog transceivers, filters, and nonvolatile memory for direct voice storage without digitization.
• Supports multiple operational modes including push-button control, looping, and consecutive addressing via address pins.
• Includes built-in automatic gain control and differential speaker driver for high-quality audio reproduction.
• Features zero-power message storage eliminating the need for battery backup circuits.

Voice Record And Playback Applications

• Car stereo messaging systems
• Handset voice prompts
• Transformer-based voice modules

Voice Record And Playback Procurement Notes

Verify the manufacturer designation as Winbond despite the Nuvoton input, as the ISD2500 series is a Winbond product line. Confirm the specific package type (SOIC or PDIP) and temperature rating (commercial die or packaged) required for the application. Ensure ordering suffixes match the desired lead-free status and physical form factor documented in the official datasheet.

Voice Record And Playback Selection Notes

Select this model when a 48-second recording duration is required within the ISD2500 family. Compare against ISD2532, ISD2540, and ISD2564 for different time constraints. Consider the sampling rate of 5.3 kHz and filter passband characteristics suitable for speech applications. Evaluate interface requirements for microcontroller compatibility versus simple push-button operation.

Voice Record And Playback Part Context

The ISD2548 belongs to the Winbond ChipCorder ISD2500 series, which utilizes patented multilevel storage technology. This series allows for direct analog storage of voice signals into EEPROM cells. The family includes variants with 32, 40, 48, and 64-second durations, sharing common pinouts and operational principles while differing in memory size and sampling frequencies.

Voice Record And Playback Replacement Considerations

ISD2548SO: Same functionality in SOIC package. ISD2548PI: Same functionality in PDIP package. ISD2548DI: Die version for board-level integration. Verify package compatibility and voltage specifications when substituting.