ISD25120S

Overview

The ISD25120S is a voice record and playback integrated circuit from Nuvoton's ChipCorder series, designed for multiple message applications. It supports up to two minutes of recording duration with a sampling frequency of 4kHz and a pass band of 1.7kHz. The device operates on a supply voltage range of 4.5 V to 6.5 V and functions within an ambient temperature range of 0°C to 70°C. It utilizes a pushbutton interface for control and accepts analog single-ended microphone input. The output signal is delivered via PWM to a speaker. The component is housed in a 28-DIP package with a width of 0.600 inches (15.24mm) and is intended for through-hole mounting.

Feature Summary

• Integrated automatic gain control for consistent audio levels
• Pushbutton interface for direct user operation without complex logic
• Internal oscillator capability for simplified clocking requirements

Applications

• Voice messaging systems
• Announcement modules
• Educational toys with recorded content

Procurement Notes

Verify the specific suffix 'S' against official Nuvoton documentation, as primary sources indicate the ISD25120P variant. Confirm RoHS compliance status, as related models are noted as non-compliant. Check part status for obsolescence before procurement planning. Ensure the 28-DIP package matches the target PCB footprint. Validate voltage requirements against the system design.

Selection Notes

Select this component when a dedicated voice recording solution with minimal external components is required. The 4kHz sampling rate is suitable for speech intelligibility rather than high-fidelity music. Consider the 28-DIP package size constraints. Verify that the pushbutton interface aligns with the user interaction design. Ensure the power supply can maintain the 4.5V to 6.5V range during operation.

Part Context

The ISD25120S belongs to the Nuvoton ChipCorder family, which specializes in voice recording and playback ICs. This series typically offers varying recording durations and memory capacities. The ISD25120 model specifically targets applications requiring moderate recording time. Other variants in the series may differ in pin count or storage capacity. The technology relies on proprietary flash memory for data retention.

Replacement Considerations

Publicly confirmed substitute part numbers for the ISD25120S are not available in the provided source material. Cross-reference with other ISD25xx series members if pin compatibility is critical. Verify functional equivalence with alternative voice ICs from different manufacturers if sourcing is restricted.