ISD1750PY

Overview

The ISD1750PY is a discontinued voice record and playback integrated circuit from the Nuvoton ChipCorder series. It supports multiple message storage with durations ranging from 33 to 100 seconds. The device operates on a supply voltage of 2.4 V to 5.5 V and features an internal oscillator. Input signals are accepted via analog single-ended microphone connections, while output is delivered through an analog single-ended PWM speaker driver. Communication interfaces include pushbutton control and SPI. The sampling frequency is adjustable between 4 kHz and 12 kHz. The component is housed in a 28-TSOP package with a width of 11.80 mm and functions within an operating temperature range of -40°C to 85°C.

Feature Summary

• Integrated multi-message management system for self-managing address locations
• Non-volatile message storage utilizing patented Multi-Level Storage (MLS) technology
• Built-in microphone preamplifier with Automatic Gain Control (AGC)
• On-chip oscillator with external resistor control capability

Applications

• Electronic systems requiring standalone voice messaging
• Microcontroller-based applications using SPI interface
• Pushbutton-operated voice recording devices

Procurement Notes

Verify component obsolescence status before design finalization as the ISD1750PY is no longer manufactured. Confirm pin compatibility with recommended substitutes such as I2361YYI or I3800FYI if transitioning designs. Request current manufacturer datasheets to validate electrical specifications against legacy documentation. Ensure supply chain sources provide authentic components due to end-of-life status.

Selection Notes

Select this component for applications requiring simple voice recording without complex microcontroller overhead. The internal MLS array simplifies message management compared to standard flash solutions. Consider the 28-TSOP package constraints for PCB layout. Evaluate the 4 kHz to 12 kHz sampling range against required audio fidelity needs. Verify power supply stability within the 2.4 V to 5.5 V range for consistent operation.

Part Context

The ISD1750PY belongs to the Nuvoton ISD1700 ChipCorder series, designed for high-quality single-chip voice recording and playback. This series integrates all necessary analog and digital circuits for voice applications. The ISD1750 variant specifically targets medium-duration messaging requirements. It represents a mature solution for cost-sensitive voice-enabled products.

Replacement Considerations

Officially recommended substitutes include I2361YYI and I3800FYI. Verify package dimensions and pinout compatibility when replacing the obsolete ISD1750PY. Check if the substitute maintains the same 28-pin configuration and SPI interface timing.