ISD1740PYI01

Overview

The ISD1740PYI01 is a multi-message single-chip voice record and playback device from the Winbond ISD1700 series. It features user-selectable message duration ranging from 26 to 80 seconds, depending on the sampling frequency. The sampling frequency can be adjusted between 4 kHz and 12 kHz using an external resistor. Operating voltage spans 2.4 V to 5.5 V. The device supports standalone push-button mode or microcontroller SPI mode. Key specifications include a differential microphone input with Automatic Gain Control (AGC), an auxiliary analog input, and dual output channels comprising a PWM Class D speaker driver and a configurable analog output.

Feature Summary

• Integrated message management system for standalone push-button applications
• Dual operating modes: Standalone and SPI interface control
• On-chip Flash memory providing zero-power message storage
• Automatic power-down after each operation cycle

Applications

• Electronic systems requiring voice messaging
• Battery-powered devices due to low standby current
• Line-powered applications with wide voltage range support
• Industrial environments utilizing industrial temperature grade options

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type, temperature rating, and special features such as vAlert. Ensure compatibility with required sampling frequencies by selecting the appropriate external oscillator resistor value. Confirm lead-free status if environmental compliance is mandatory for the target application.

Selection Notes

Select the ISD1740 variant based on the required message duration and sampling frequency combination. Choose the industrial temperature grade (-40°C to +85°C) for harsh environments. Consider the packaging options available, including TSOP, SOIC, and PDIP, based on PCB layout constraints. Evaluate the need for SPI control versus standalone operation when designing the system architecture.

Part Context

The ISD1740 belongs to the Winbond ISD1700 ChipCorder series, which utilizes patented Multi-Level Storage (MLS) technology. This series allows audio data to be stored directly in solid-state memory without digital compression. The family offers various models with different recording durations, catering to diverse voice messaging requirements across consumer and industrial electronics.

Replacement Considerations

Direct replacements within the ISD1700 series include ISD1730, ISD1750, ISD1760, ISD1790, ISD17120, ISD17150, ISD17180, ISD17210, and ISD17240. Selection depends on matching the required message duration and sampling frequency. Verify pinout compatibility and electrical characteristics before substitution.