ISD1790SY01

Overview

The ISD1790SY01 is a multi-message single-chip voice record and playback device from the ISD1700 series. It features user-selectable message durations ranging from 60 to 180 seconds, determined by an external oscillator resistor that sets the sampling frequency between 4 kHz and 12 kHz. The device operates on a supply voltage of 2.4 V to 5.5 V and supports both standalone push-button and SPI microcontroller modes. It utilizes patented Multi-Level Storage (MLS) technology for non-volatile Flash memory storage without digital compression. Key electrical parameters include a typical standby current of 1 µA, 100-year message retention, and 100,000 record cycles.

Feature Summary

• Integrated proprietary message management system enabling sophisticated multi-message control in standalone push-button environments.
• Dual operating modes allowing flexible deployment in simple hardware setups or complex microcontroller-controlled systems via SPI interface.
• High-fidelity audio reproduction capabilities with differential microphone input featuring Automatic Gain Control (AGC) and dual output channels for direct speaker driving or external amplifier connection.

Applications

• Standalone electronic greeting cards and voice-enabled toys requiring simple push-button operation.
• Industrial and commercial automated announcements using microcontroller integration for precise timing and message sequencing.
• Security alarm systems and access control devices utilizing voice prompts and status indicators.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to confirm package type, temperature rating, and special features such as vAlert support. Ensure compatibility with the required sampling frequency and message duration specifications for the target application design.

Selection Notes

Select this component when applications require high-quality uncompressed voice storage with flexible message management. Consider the ISD1700 series for designs needing either standalone simplicity or detailed SPI control. Evaluate the external resistor requirements to match the desired balance between recording duration and audio fidelity within the 4 kHz to 12 kHz range.

Part Context

The ISD1790SY01 belongs to the Winbond ISD1700 ChipCorder series, which provides fully integrated voice recording solutions. This series is characterized by its use of Multi-Level Storage technology, eliminating the need for separate flash memory or compression codecs. It serves as a cost-effective alternative to discrete voice recording circuits in consumer and industrial electronics.

Replacement Considerations

ISD1730SYI

FAQ

How is the sampling frequency adjusted on the ISD1790SY01?

The sampling frequency is adjusted by connecting an external resistor to the ROSC pin. The value of this resistor determines the frequency, which ranges from 4 kHz to 12 kHz, thereby influencing the total message duration.

What is the function of the vAlert feature?

The vAlert feature allows the device to flash an external LED to indicate the presence of a new message. This provides a visual notification mechanism for users in standalone applications.

Can the ISD1790SY01 operate without a microcontroller?

Yes, the device supports a Standalone (Push-Button) mode. In this configuration, operations such as record, play, erase, and forward are controlled directly by external buttons, and the device automatically enters power-down mode after each operation cycle.