ISD1790PYI01

Overview

The ISD1790PYI01 is a multi-message single-chip voice record and playback device from the ISD1700 series. It supports message durations ranging from 60 to 180 seconds, depending on the sampling frequency selected via an external resistor. The sampling frequency can be adjusted between 4 kHz and 12 kHz. The device operates within a voltage range of 2.4 V to 5.5 V. It features integrated message management for standalone push-button applications or microcontroller control via SPI. Key components include a microphone preamplifier with Automatic Gain Control (AGC), a PWM Class D speaker driver, and non-volatile Multi-Level Storage (MLS) Flash memory.

Feature Summary

• Integrated message management system enabling standalone push-button operation with automatic power-down after each cycle.
• Dual operating modes supporting both direct push-button control and full user control via a 4-wire SPI interface.
• On-chip oscillator and Automatic Gain Control (AGC) allowing flexible adjustment of recording quality and duration.
• Direct drive capability for standard speakers or buzzers through a differential PWM Class D output.

Applications

• Standalone electronic greeting cards and voice toys
• Industrial equipment voice prompts and alarms
• Automotive warning systems and announcements
• Consumer appliance voice feedback modules

Procurement Notes

Verify the specific package type required, as the ISD1700 series is available in SOIC, PDIP, and TSOP configurations. Confirm the temperature grade, noting that the 'I' suffix indicates industrial range (-40°C to +85°C). Ensure the ordering code matches the desired duration and vAlert feature availability. Check for lead-free packaging options if required by environmental regulations.

Selection Notes

Select the ISD1790 variant when a message duration between 60 and 180 seconds is required. Choose the sampling frequency based on the trade-off between audio fidelity and storage capacity; higher frequencies provide better quality but shorter durations. Determine if standalone push-button functionality or SPI microcontroller integration is needed for the application design.

Part Context

The ISD1790 is part of the Winbond ISD1700 ChipCorder series, which utilizes patented Multi-Level Storage (MLS) technology. This series allows for high-quality voice reproduction without digital compression. The ISD1790 specifically targets applications requiring moderate recording times, bridging the gap between shorter duration models like the ISD1730 and longer duration models like the ISD17120.

Replacement Considerations

ISD1790SIE01: Same functional specifications but housed in a Small Outline Integrated Circuit (SOIC) package instead of the PDIP package indicated by the 'P' suffix in the model number.