ISD1420PY

Overview

The ISD1420PY is a single-chip voice record and playback device from the ISD1400 series, manufactured by Nuvoton Technology Corporation. It utilizes Multi-Level Storage (MLS) technology for non-volatile message storage with zero-power retention. The component supports a recording duration of 20 seconds at a sampling frequency of 6.4 kHz. It operates on a single +5V supply within a voltage range of 4.5 V to 5.5 V. Key electrical parameters include a filter passband of 2.6 kHz and an automatic gain control (AGC) circuit. The device is housed in a 28-PDIP package and functions within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Integrates microphone preamplifier, AGC, anti-aliasing filter, and speaker amplifier on a single chip.
• Supports multiple messages through fully addressable memory segments.
• Features automatic power-down mode to minimize standby current consumption.
• Provides direct analog storage for high-quality natural voice reproduction.

Applications

• Short-duration messaging systems
• Voice prompts and announcements
• Educational toys and novelty items

Procurement Notes

Verify the specific ordering suffix to confirm the package type and lead-free status, as the ISD1400 series includes various packaging options such as SOIC and PDIP. Confirm the manufacturing source, as Winbond originally developed this series before Nuvoton acquired the relevant assets. Check for end-of-life status or availability of equivalent newer generations if long-term supply stability is required for production.

Selection Notes

Select the ISD1420PY when a fixed 20-second recording duration is sufficient for the application. Choose this part over the ISD1416 if lower sampling rates are acceptable to maximize recording time. Ensure the design accommodates the 28-pin DIP footprint and provides adequate decoupling for the separate analog and digital power supplies. Consider external clock requirements if precise timing stability across industrial temperature ranges is necessary.

Part Context

The ISD1420PY belongs to the ISD1400 ChipCorder series, which offers short-duration voice solutions using patented MLS technology. This series allows for direct analog storage without digitization, distinguishing it from later digital voice ICs. The product line was originally introduced by Winbond and is now managed by Nuvoton Technology Corporation following corporate restructuring.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.