ISD1420P

Overview

The ISD1420P is a single-chip voice record/playback device from the ISD1400 series, utilizing Multi-Level Storage technology for direct analog storage in non-volatile memory. It provides a 20-second recording duration with a sampling frequency of 6.4 kHz and a filter passband of 2.6 kHz. The IC operates on a single +5V supply (4.5V to 5.5V) and features an internal oscillator, microphone preamplifier, automatic gain control, and a Class D speaker amplifier capable of driving loads as low as 16 Ω. It supports edge- or level-activated playback and includes fully addressable segments for multiple messages.

Feature Summary

• Direct analog storage without digitization or compression for natural voice reproduction
• Zero-power message storage eliminating the need for battery backup circuits
• Automatic power-down mode reducing standby current to approximately 1 µA
• Fully addressable architecture supporting up to 160 distinct message segments

Applications

• Short-duration messaging systems requiring manual switch activation
• Voice prompts and announcements in consumer electronics
• Security alarm system voice notifications
• Industrial control audio feedback modules

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to potential availability constraints. Confirm package type and temperature grade match design requirements. Check for end-of-life status or obsolescence notices before finalizing procurement plans. Ensure supply chain stability for long-term production needs.

Selection Notes

Select the ISD1420P when a fixed 20-second duration at 6.4 kHz sampling rate is required. Choose this model over the ISD1416 if longer recording time is prioritized over higher sampling frequency. Ensure the application supports a single +5V power supply and can accommodate the 28-pin PDIP or SOIC package dimensions.

Part Context

The ISD1420P belongs to the ISD1400 ChipCorder series, which offers single-chip solutions for short-duration voice applications. This series utilizes patented Multi-Level Storage technology to store voice signals directly in non-volatile memory cells. The family includes variants like the ISD1416 for 16-second durations and supports both commercial and industrial temperature ranges depending on the specific suffix.

Replacement Considerations

The ISD1416 serves as a functional alternative within the same series, offering 16 seconds of duration at an 8.0 kHz sampling rate. Both components share identical pinouts and operational modes, allowing for direct substitution if duration or sampling frequency adjustments are acceptable.