ISD17240SY01

Overview

The ISD17240SY01 is a single-chip multi-message voice record and playback device from the ISD1700 series. It features an operating voltage range of 2.4 V to 5.5 V and supports sampling frequencies from 4 kHz to 12 kHz, determined by an external oscillator resistor. The device provides message durations ranging from 160 seconds at 12 kHz up to 480 seconds at 4 kHz. It includes an internal oscillator, microphone preamplifier with Automatic Gain Control (AGC), and a PWM Class D speaker driver. The component operates in standalone push-button mode or via SPI interface and utilizes Multi-Level Storage (MLS) technology for non-volatile Flash memory recording.

Feature Summary

• Integrated message management system enabling self-managed address locations for multiple messages without microcontroller intervention.
• Dual operating modes supporting simple standalone push-button control or full user configuration via SPI interface.
• Patented Multi-Level Storage (MLS) technology allowing direct audio data storage in solid-state memory without digital compression.
• Built-in Automatic Gain Control (AGC) for differential microphone inputs and configurable analog auxiliary input paths.

Applications

• Standalone electronic greeting cards and toys requiring push-button voice interaction.
• Industrial equipment status reporting and automated voice prompts.
• Consumer appliances featuring recorded instructions or alarm notifications.
• Security systems utilizing voice alerts and message indicators.

Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation to confirm package type and temperature rating. Confirm lead-free status if required by assembly specifications. Check product lifecycle status as older series components may be subject to discontinuation. Ensure supply chain sources provide original manufacturer packaging to prevent counterfeit risks.

Selection Notes

Select this model when fixed message durations between 160 and 480 seconds are required based on the chosen sampling frequency. Choose the industrial temperature variant (-40°C to +85°C) for harsh environments. Use the SOIC package for surface mount applications. Consider the vAlert feature availability if LED message indication is necessary for the design.

Part Context

This component belongs to the ISD1700 ChipCorder series, which offers various duration options ranging from 20 to 480 seconds. The ISD17240 specifically targets applications needing longer recording times compared to shorter variants like the ISD1730 or ISD1740. All devices in the series share the same core architecture and pinout compatibility.

Replacement Considerations

ISD17240SYI

FAQ

How is the sampling frequency adjusted?

The sampling frequency is selected by connecting a specific external resistor value to the ROSC pin. Values range from 53 kΩ for 12 kHz to 160 kΩ for 4 kHz.

What is the function of the vAlert feature?

The vAlert feature allows the device to flash an external LED connected to the LED pin to indicate the presence of a new, unread message.

Can the device operate without a microcontroller?

Yes, the ISD17240 supports a Standalone (Push-Button) mode where operations like record, play, and erase are controlled directly by hardware pins.