ISD1750PYI

Overview

The ISD1750PYI is a fully integrated, single-chip multi-message voice record and playback device from the Nuvoton ChipCorder series. It features non-volatile message storage using patented Multi-Level Storage (MLS) technology, allowing for user-selectable recording durations ranging from 33 to 100 seconds. The device supports sampling frequencies between 4 kHz and 12 kHz, adjustable via an external resistor to balance duration and audio quality. Operating on a supply voltage of 2.4 V to 5.5 V, it incorporates an internal oscillator, microphone preamplifier with Automatic Gain Control (AGC), volume control, and a Pulse Width Modulation (PWM) Class D speaker driver. The component interfaces via pushbutton or SPI protocols and is housed in a 28-TSOP package.

Feature Summary

• Integrated Multi-Level Storage (MLS) array enables non-volatile message retention without external memory components.
• Proprietary message management system allows self-managed address locations for multiple messages in a simple push-button environment.
• On-chip signal processing includes microphone preamplifier with Automatic Gain Control (AGC) and anti-aliasing filter.
• Built-in Pulse Width Modulation (PWM) Class D speaker driver provides direct analog output capability.

Applications

• Electronic greeting cards and novelty items requiring short voice clips
• Industrial control panels with voice prompts
• Consumer toys and interactive games
• Automotive warning systems and safety announcements

Procurement Notes

Verify current manufacturing status as the ISD1750 series may be subject to obsolescence notices. Confirm exact suffix specifications against official datasheets to ensure pin compatibility and functional equivalence with existing designs. Check for recommended manufacturer substitutes if primary availability is limited.

Selection Notes

Select this component when a standalone voice solution without microcontroller intervention is required. Choose based on desired recording time versus sampling frequency trade-offs achievable through external resistor selection. Ensure the application environment operates within the specified -40°C to 85°C temperature range and 2.4 V to 5.5 V supply voltage constraints.

Part Context

The ISD1750PYI belongs to the Nuvoton ISD1700 ChipCorder family, which offers various recording durations and package options. This specific model provides mid-range recording capacity suitable for applications needing multiple distinct voice messages. It shares architectural similarities with other ISD17xx variants but differs in specific timing parameters and interface configurations defined by its datasheet.

Replacement Considerations

Officially recommended substitutes include I2361YYI, I3800FYI, and I3900FYI from Nuvoton Technology Corporation. Verify pinout compatibility and electrical characteristics before substitution. Consult the latest Product Change Notice (PCN) for any design-in changes affecting legacy parts.