24LC1026-I/SN

Memory IC Overview

The Microchip Technology 24LC1026-I/SN is a 1 Mbit (128K x 8) serial electrically erasable PROM featuring 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 in industrial environments (-40°C to +85°C). The device includes 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.

Memory IC Feature Summary

• Supports cascading up to four devices on a single bus using configurable chip select pins A1 and A2.
• Includes a 128-byte page write buffer to optimize write throughput.
• Features hardware write protection controlled by the WP pin to inhibit array writes.
• Incorporates Schmitt trigger inputs and output slope control for enhanced signal integrity.

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing low-power memory
• Industrial control systems utilizing I2C communication protocols

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage operating range aligns with system requirements, as variants exist for different supply voltages. Ensure compatibility with the target I2C bus speed specifications before finalizing procurement.

Memory IC Selection Notes

Select this component when a 1 Mbit capacity is required with standard I2C connectivity. Consider the SOIC-8 package for surface mount assembly needs. Evaluate the 2.5V minimum supply voltage against available power rails. Check if the industrial temperature range meets environmental constraints.

Memory IC Part Context

This part belongs to the 24XX1026 family of serial EEPROMs from Microchip Technology. It shares functional similarities with the 24AA1026 and 24FC1026 but differs in supply voltage ranges and maximum clock speeds. The 'I' suffix denotes the industrial temperature rating, while 'SN' indicates the SOIC-8 package configuration.

Memory IC Replacement Considerations

Direct substitutes include other 24LC1026 variants with different packages or temperature ratings. Cross-reference with 24AA1026 or 24FC1026 only if voltage and speed requirements are compatible. Verify pinout and electrical characteristics match before substitution.

Memory IC FAQ

How does the hardware write protection function?

Tying the WP pin to VCC inhibits all write operations to the array, while connecting it to VSS enables them. Read operations remain unaffected regardless of the WP state.

What is the maximum number of devices supported on one bus?

Up to four 24LC1026 devices can be connected to the same data bus by configuring the A1 and A2 chip select pins differently.