ISD2532PY

Overview

The ISD2532PY is a single-chip voice record/playback device from the Winbond ChipCorder series, manufactured by Nuvoton Technology Corporation. It provides 32 seconds of recording duration using direct analog storage in nonvolatile memory cells. The device operates on a single 5V supply and features an internal oscillator with a sampling frequency of 8.0 kHz. It includes an on-chip microphone preamplifier, automatic gain control, and differential speaker outputs capable of driving 50 mW into 16 Ω. The component supports microcontroller interfaces or push-button operation modes and is available in 28-lead PDIP packages.

Feature Summary

• Direct analog storage technology for natural voice reproduction without digitization
• Integrated microphone preamplifier with automatic gain control
• On-chip nonvolatile memory for zero-power message retention
• Supports multiple operational modes including push-button control

Applications

• Single-message voice prompts
• Multiple-message greeting systems
• Low-cost voice recording toys
• Industrial equipment status alerts

Procurement Notes

Verify the manufacturer designation carefully, as the datasheet identifies Winbond as the original designer while Nuvoton lists the part. Confirm the package type matches the 'P' suffix (PDIP) and ensure the specific revision aligns with design requirements. Check RoHS compliance status as older revisions may differ.

Selection Notes

Select this model for applications requiring up to 32 seconds of audio. Consider the ISD2540, ISD2548, or ISD2564 if longer durations are needed, noting that increased duration reduces sampling frequency. Ensure the power supply voltage stays within the 4.5V to 5.5V range for packaged parts.

Part Context

This component belongs to the ISD2500 ChipCorder series, which utilizes patented multilevel storage technology. The series includes variants with 32, 40, 48, and 64-second capacities. These devices are designed for simple interface requirements, supporting both microcontroller-driven and standalone push-button operations.

Replacement Considerations

ISD2540P, ISD2548P, ISD2564P offer longer durations but lower sampling rates. ISD25120P provides significantly longer recording times with different electrical characteristics. Verify pin compatibility and software logic when substituting with other ChipCorder variants.