24LC1026-E/ST

Memory IC Overview

The Microchip Technology 24LC1026-E/ST is a 1 Mbit (128K x 8) serial EEPROM utilizing an I²C-compatible 2-Wire interface. It operates within a voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz. The device features a 128-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It offers over one million erase/write cycles and data retention exceeding 200 years. The component is housed in an 8-lead SOIJ package and is rated for industrial temperature ranges from -40°C to +125°C.

Memory IC Feature Summary

• Supports both byte and page write operations with a 128-byte on-chip buffer.
• Features hardware write protection controlled by the WP pin to inhibit array writes.
• Includes Schmitt trigger inputs and output slope control for enhanced noise immunity and ground bounce elimination.
• Allows cascading up to four devices on the same bus using configurable chip select pins.

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing low-power memory solutions
• Industrial control systems operating across wide temperature ranges

Memory IC Procurement Notes

Verify that the ordering suffix matches the required specifications: 'E' indicates automotive temperature range (-40°C to +125°C), while 'ST' denotes the 8-lead SOIJ package. Confirm the voltage range requirement aligns with the 2.5V to 5.5V specification, as this variant differs from the broader 1.7V range available in other family members like the 24AA1026.

Memory IC Selection Notes

Select this part when a 1 Mbit capacity is required with strict write protection needs. The 24LC1026 series is optimized for lower power consumption compared to standard CMOS technologies. Ensure the application environment stays within the specified voltage limits, as performance at lower voltages may restrict maximum clock speeds or require specific timing adjustments.

Memory IC Part Context

This component belongs to the 24XX1026 family, which includes the 24AA1026 and 24FC1026 variants. While sharing identical memory architecture and interface protocols, these parts differ primarily in operating voltage ranges and maximum clock frequencies. The 24LC1026 specifically targets applications requiring reliable operation between 2.5V and 5.5V.

Memory IC Replacement Considerations

Direct functional substitutes within the same package include the 24LC1026-I/ST (industrial temperature range). Cross-family replacements like the 24AA1026 offer wider voltage support but may have different electrical characteristics. Verify pin compatibility and software protocol adherence before substituting.