ISD1740PY01

Overview

The ISD1740PY01 is a multi-message single-chip voice record and playback device from the Winbond ISD1700 series. It features on-chip Flash memory for zero-power message storage using Multi-Level Storage technology, supporting durations of 26 to 80 seconds depending on sampling frequency (4 kHz to 12 kHz). Operating voltage ranges from 2.4 V to 5.5 V with industrial temperature support (-40°C to +85°C). The device offers standalone push-button or SPI microcontroller modes, differential microphone inputs with AGC, auxiliary analog input, PWM Class D speaker driver, and configurable analog output.

Feature Summary

• Integrated message management system enabling simple push-button operation with automatic power-down after each cycle.
• Dual operating modes: Standalone mode for direct control and SPI mode for full microcontroller programmability via APC register.
• High-quality audio reproduction with dual input channels (differential MIC with AGC and single-ended AnaIn) and dual outputs (PWM Class D speaker driver and configurable analog output).
• Optional vAlert feature for new message indication and four customizable sound effects for operational feedback.

Applications

• Electronic systems requiring user-selectable message duration and quality flexibility.
• Battery-powered or line-powered applications utilizing wide operating voltage range.
• Industrial environments requiring operation across -40°C to +85°C temperature range.
• Devices needing integrated voice recording and playback without external compression.

Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation to confirm package type, temperature grade, and lead-free status. The 'P' indicates PDIP packaging, 'Y' denotes lead-free composition, and '01' signifies the inclusion of the optional vAlert feature. Ensure compatibility with required sampling frequencies and message durations before finalizing procurement specifications.

Selection Notes

Select this component when a single-chip solution for multi-message voice recording and playback is required without digital compression. Consider the ISD1740 variant specifically for its 26 to 80-second duration range at various sampling frequencies. Evaluate whether standalone push-button control or SPI interface integration best suits the system architecture. Confirm that the industrial temperature rating and wide voltage supply meet the environmental and power constraints of the target application.

Part Context

The ISD1740 belongs to the Winbond ISD1700 ChipCorder series, which utilizes patented Multi-Level Storage technology for solid-state voice storage. This family provides high-fidelity audio reproduction by storing audio data directly in Flash memory. The series supports various message durations and sampling rates, allowing designers to balance recording quality against total message time based on application needs.

Replacement Considerations

Direct replacements within the ISD1700 series include ISD1730, ISD1750, ISD1760, ISD1790, ISD17120, ISD17150, ISD17180, ISD17210, and ISD17240, differing primarily in maximum message duration. Verify pinout compatibility and ensure the substitute part supports the required SPI commands or standalone control signals if migrating between variants.