ISD1760SYIR

Overview

The Nuvoton ISD17240SYIR is a single-chip voice record and playback device from the ISD1700 ChipCorder series. It features Multi-Level Storage (MLS) technology for non-volatile message storage without digital compression. The device supports sampling frequencies of 4 to 12 kHz, selectable via an external resistor, with a maximum recording duration of 480 seconds at 4 kHz. Operating voltage ranges from 2.4 V to 5.5 V. It includes an on-chip oscillator, microphone preamplifier with Automatic Gain Control (AGC), and a PWM Class D speaker driver. The component is housed in a 28-SOIC package and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Integrated message management system allowing standalone push-button operation or microcontroller SPI control.
• Dual input channels supporting differential microphone with AGC and single-ended auxiliary analog input.
• Dual output configuration providing a PWM Class D speaker driver and configurable analog current/voltage output.
• Patented Multi-Level Storage (MLS) technology enabling direct audio data storage in solid-state memory.

Applications

• Standalone electronic greeting cards and toys
• Voice-enabled home appliances and security systems
• Industrial equipment status alerts and announcements

Procurement Notes

Verify the specific suffix 'I' indicates industrial temperature rating (-40°C to 85°C). Confirm the 'R' suffix corresponds to tape and reel packaging if required by automated assembly lines. Ensure the ordering code matches the exact 28-SOIC footprint and pinout specifications defined in the datasheet.

Selection Notes

Select this model when extended recording time up to 480 seconds is required. Choose based on the necessary sampling frequency resolution determined by the external oscillator resistor. Verify that the 2.4V to 5.5V supply range aligns with the target battery or line-powered application constraints.

Part Context

This component belongs to the ISD1700 ChipCorder series, which offers various message durations ranging from 26 to 480 seconds. The ISD17240 variant specifically provides the longest recording capacity within this family, utilizing the same core architecture and interface protocols as shorter-duration models like the ISD1730 or ISD1760.

Replacement Considerations

Direct substitutes within the ISD1700 series include ISD1730, ISD1760, and ISD17120, which share identical pinouts and functionality but offer reduced recording durations. Cross-series replacements may require firmware and hardware redesign due to different interface or power requirements.

FAQ

How is the sampling frequency adjusted?

The sampling frequency is selected by connecting a specific external resistor value to the ROSC pin, ranging from 4 kHz to 12 kHz.

Can the device operate without a microcontroller?

Yes, it supports a Standalone mode where operations are controlled directly via push-buttons connected to REC, PLAY, ERASE, and other control pins.

What type of speaker output does it provide?

It features a differential PWM Class D speaker driver capable of directly driving an 8-ohm speaker or typical buzzer.