ISD2564P

Overview

The ISD2564P is a single-chip, multiple-message voice record and playback device from the Winbond ISD2500 series. It provides a recording duration of 64 seconds using on-chip nonvolatile multilevel storage array technology. The CMOS device integrates an on-chip oscillator, microphone preamplifier with automatic gain control, antialiasing filter, smoothing filter, and speaker amplifier. It operates on a single 5-volt power supply and supports microcontroller interfaces for complex messaging. The device features zero-power message storage, eliminating the need for battery backup circuits.

Feature Summary

• Single-chip solution integrating analog transceivers, memory, and control logic
• Direct analog storage in nonvolatile memory for natural voice reproduction
• Microcontroller compatible with fully addressable multiple message handling
• Built-in operational modes including push-button control and looping

Applications

• Car stereo voice prompts
• Handset answering machines
• Transformer-based voice modules
• Consumer electronic speech synthesis

Procurement Notes

Verify the manufacturer designation carefully as the ISD2500 series was originally developed by Winbond. Confirm that the specific part number corresponds to the packaged version rather than the die form if surface mount assembly is required. Ensure the voltage supply matches the commercial operating range specifications before integration into the final design.

Selection Notes

Select this model when a 64-second recording duration is required within the ISD2500 family. Note that the 64-second duration results in a lower sampling frequency compared to shorter duration variants. Verify that the packaging type meets the thermal and mechanical requirements of the target application environment.

Part Context

This component belongs to the ISD2500 ChipCorder series, which utilizes patented multilevel storage technology. The series includes variants with 32, 40, and 48-second durations. The ISD2564P represents the longest duration option in this specific product line, offering extended messaging capabilities without external memory components.

Replacement Considerations

ISD2564S

FAQ

How does the ISD2564P store audio data?

Voice and audio signals are stored directly into on-chip nonvolatile memory cells in their natural analog form without digitization or compression.

What is the function of the EOM pin in Push-Button Mode?

In Push-Button Mode (M6), the EOM pin functions as an active-HIGH run indicator, signaling when a record or playback operation is currently in progress.

Can the ISD2564P be cascaded for longer durations?

Yes, the devices are directly cascadable. The overflow output can be used to connect multiple units to increase total record/playback duration.