ISD1760SYI

Overview

The ISD1760SYI is a single-chip multi-message voice record and playback device from the Nuvoton ISD1700 ChipCorder series. It features an operating voltage range of 2.4 V to 5.5 V and supports sampling frequencies adjustable from 4 kHz to 12 kHz via an external resistor. The device provides a message duration of 40 seconds at 12 kHz, scaling up to 120 seconds at 4 kHz. It utilizes patented Multi-Level Storage (MLS) technology for non-volatile Flash memory storage without digital compression. The component includes an on-chip oscillator, microphone preamplifier with Automatic Gain Control (AGC), and a PWM Class D speaker driver capable of directly driving an 8 Ω speaker or buzzer.

Feature Summary

• Integrated message management system enabling standalone push-button operation with automatic power-down after each cycle.
• Dual input channels supporting differential microphone inputs with AGC and a single-ended auxiliary analog input.
• Dual output channels providing a differential PWM Class D speaker driver and a configurable single-ended current or voltage output.
• Supports both standalone mode and microcontroller SPI mode for full user control via serial interface commands.

Applications

• Standalone electronic systems requiring simple push-button voice recording and playback.
• Battery-powered applications utilizing low voltage operation and automatic power conservation.
• Microcontroller-based systems requiring SPI interface control for random memory access.
• Devices needing direct drive capability for standard speakers or buzzers without external amplifiers.

Procurement Notes

Verify the specific package type and temperature grade when ordering, as the ISD1700 series offers multiple options including SOIC and PDIP packages with commercial or industrial temperature ranges. Confirm that the required message duration aligns with the selected sampling frequency settings. Ensure the design accounts for the necessary external components such as the oscillator resistor and decoupling capacitors specified in the datasheet application circuits.

Selection Notes

Select the ISD1760SYI when a fixed message duration of approximately 40 to 120 seconds is required depending on the chosen sampling rate. Choose this component over other series members if the specific capacity matches the application needs better than shorter or longer duration variants like the ISD1730 or ISD17240. Consider the available packaging options and ensure the operating environment falls within the specified temperature range for the selected variant.

Part Context

The ISD1760SYI belongs to the Nuvoton ISD1700 ChipCorder series, which comprises various single-chip voice record and playback devices differentiated primarily by their message duration capabilities. This series shares common architectural features such as MLS technology, dual operating modes, and integrated audio processing blocks. The 'SYI' suffix typically denotes a specific package and temperature rating combination within the broader ISD1700 product family.

Replacement Considerations

Publicly confirmed substitute part numbers are not provided in the source material. Designers should evaluate other members of the ISD1700 series, such as the ISD1730 or ISD17240, based on required duration and sampling frequency compatibility. Verify pinout and electrical characteristics against the target application before considering any alternative components.