ISD17120PY

Overview

The ISD17120PY is a single-chip multi-message voice record and playback device from the Nuvoton ISD1700 ChipCorder series. It features on-chip Flash memory for zero-power message storage using Multi-Level Storage technology, supporting up to 240 seconds of recording duration at 4 kHz sampling frequency. The device operates within a voltage range of 2.4 V to 5.5 V and supports both standalone push-button mode and SPI microcontroller interface modes. Key components include a differential microphone input with Automatic Gain Control, an auxiliary analog input, and dual output channels consisting of a PWM Class D speaker driver and a configurable analog output.

Feature Summary

• Integrated message management system enabling standalone operation via push-buttons or full control through SPI commands.
• Dual operating modes allowing automatic power-down in standalone mode and flexible address access in SPI mode.
• Built-in Automatic Gain Control (AGC) for differential microphone inputs and support for auxiliary analog feed-through.
• Direct drive capability for 8 Ω speakers via PWM Class D outputs alongside configurable current or voltage analog outputs.

Applications

• Electronic greeting cards and toys requiring simple push-button voice interaction
• Industrial and consumer appliances needing voice prompts and status announcements
• Security systems utilizing voice alerts and vAlert new message indicators
• Automotive infotainment interfaces for basic voice guidance

Procurement Notes

Verify the specific suffix 'PY' corresponds to the PDIP-28 package and industrial temperature range (-40°C to +85°C) as defined in the official ordering information table. Confirm that the required recording duration aligns with the 240-second maximum available at the lowest sampling frequency settings. Ensure design compliance with the recommended decoupling capacitor values and ground separation practices outlined in the application notes to maintain audio quality.

Selection Notes

Select this model when a total solution without external compression chips is required for voice messaging applications. Compare against other ISD1700 variants based on the necessary recording time; choose higher capacity models like ISD17240 if durations exceeding 240 seconds are needed. Consider the packaging constraints, opting for SOIC if surface mount space is limited, or PDIP for through-hole prototyping. Evaluate the need for SPI programmability versus simple hardware button control to determine if the full feature set is utilized.

Part Context

The ISD17120 belongs to the ISD1700 series, which utilizes Nuvoton's proprietary Multi-Level Storage technology to store audio data directly in solid-state memory. This series is designed to replace traditional magnetic tape or discrete codec solutions by integrating the microphone preamp, ADC, DAC, and speaker driver into a single component. It serves as a cost-effective alternative for applications prioritizing ease of integration and low standby power consumption.

Replacement Considerations

ISD1730: Offers shorter duration (60s at 4kHz). ISD1760: Offers medium duration (120s at 4kHz). ISD17240: Offers longer duration (480s at 4kHz). All share identical pinouts and operational modes within the ISD1700 family.