ISD1420PYI

Overview

The ISD1420PYI is a single-chip voice record and playback device from the ISD1400 series, manufactured by Nuvoton Technology Corporation. It provides 20 seconds of recording duration using direct analog storage technology. The component operates on a single +5V supply (4.5V to 5.5V) with a typical standby current of 1 µA. Key electrical parameters include a sampling frequency of 6.4 kHz, a filter passband of 2.6 kHz, and an internal oscillator. It features automatic gain control, a microphone preamplifier, and a speaker amplifier capable of driving loads as low as 16 Ω. The device supports edge- or level-activated playback and manual switch or microcontroller compatibility.

Feature Summary

• Direct analog storage for high-quality natural voice reproduction without digitization
• Zero-power message storage in non-volatile memory eliminating battery backup needs
• Automatic power-down mode reducing standby current to approximately 1 µA
• Fully addressable architecture supporting multiple messages and operational modes

Applications

• Short-duration messaging systems
• Voice prompts and announcements
• Security alarm systems
• Educational toys and games

Procurement Notes

Verify the specific suffix 'I' indicates industrial temperature range (-40°C to 85°C) versus commercial range (0°C to 70°C) per the datasheet. Confirm package type availability, as PDIP and SOIC are listed. Check manufacturer status as the product may be discontinued or subject to last-time buy notices. Ensure ordering documentation matches the exact part number for lead time and compliance verification.

Selection Notes

Select this component for applications requiring simple, single-chip voice recording without external microcontrollers. Choose based on required duration (16s vs 20s) and temperature range (Commercial vs Industrial). Consider the 2.6 kHz bandwidth for speech clarity. Evaluate if the 160 addressable segments meet message count requirements. Verify power supply stability as the device uses an internal oscillator sensitive to voltage variations.

Part Context

The ISD1420PYI belongs to the Winbond/Nuvoton ISD1400 ChipCorder series, which utilizes Multi-Level Storage (MLS) technology. This series includes variants like ISD1416 (16 seconds) and ISD1420 (20 seconds). The technology stores voice signals directly into non-volatile memory cells, distinguishing it from digital audio solutions that require compression. The series is designed for low-component-count implementations.

Replacement Considerations

ISD1420PI: Commercial temperature version of the same 20-second device.

FAQ

How does the ISD1420PYI store audio data?

It uses direct analog storage, storing voice and audio signals directly into on-chip non-volatile memory cells without digitization or compression.

What is the function of the AGC pin?

The AGC pin connects to an Automatic Gain Control circuit that dynamically adjusts the preamplifier gain to compensate for varying microphone input levels, ensuring minimal distortion.

Can the device be used for multiple messages?

Yes, the device has 160 distinct addressable segments, allowing for fully addressable multiple message applications via the A0-A7 address inputs.