25AA1024-I/W16K

Memory IC Overview

The Microchip Technology 25AA1024-I/W16K is a 1-Mbit (128 K x 8) serial EEPROM utilizing an SPI-compatible interface. It operates within a supply voltage range of 1.8 V to 5.5 V and supports clock frequencies up to 20 MHz. The device features a 256-byte page size, 1 million erase/write cycle endurance, and data retention exceeding 200 years. It includes sector write protection, deep power-down mode with 1 µA current consumption, and operates across the industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports byte and page-level write operations without requiring prior sector or page erase cycles.
• Includes hardware write protection via the WP pin and software protection through the STATUS register block protect bits.
• Features a HOLD input that allows suspension of serial communication to service higher priority interrupts without resetting the sequence.

Memory IC Applications

• Data logging in industrial control systems
• Configuration storage for microcontroller-based embedded devices
• Parameter storage in automotive electronics

Memory IC Procurement Notes

Verify the specific suffix 'W16K' against official Microchip documentation to confirm package type and tape-and-reel specifications. Ensure the Industrial temperature grade (-40°C to +85°C) matches system requirements. Confirm RoHS compliance status and AEC-Q100 qualification if applicable to the target application environment.

Memory IC Selection Notes

Select this component for applications requiring high-density nonvolatile storage with fast SPI access. It is suitable for designs needing flexible write protection schemes and low standby power. Consider the 256-byte page boundary constraints when designing write algorithms to prevent data wrap-around errors.

Memory IC Part Context

This part belongs to the 25AA1024 family of 1-Mbit serial EEPROMs from Microchip Technology. The series offers compatibility with standard SPI protocols and provides robust data retention and endurance characteristics typical of CMOS EEPROM technology. It serves as a reliable storage solution for persistent data in various electronic systems.

Memory IC Replacement Considerations

Compatible substitutes include other 1-Mbit SPI EEPROMs from Microchip such as the 25LC1024, provided voltage levels and timing parameters are verified. Cross-vendor replacements require careful assessment of pinout compatibility and command set adherence.

Memory IC FAQ

How does the HOLD pin function during serial communication?

The HOLD pin suspends transmission to the device while in the middle of a serial sequence without resetting the sequence. Transitions on SI and SCK are ignored while held low, allowing the host to service interrupts.

What is the maximum clock frequency supported by the device?

The device supports a maximum clock frequency of 20 MHz, depending on the supply voltage level.