25LC020A-E/SN

Overview

The Microchip Technology 25LC020A-E/SN is a 2 Kbit (256 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It utilizes an SPI-compatible serial bus for communication, supporting a maximum clock frequency of 10 MHz at supply voltages between 4.5 V and 5.5 V. The device operates within a supply voltage range of 2.5 V to 5.5 V and features low-power CMOS technology with standby current as low as 1 µA. It offers high reliability with 1,000,000 erase/write cycle endurance and data retention exceeding 200 years. The component is housed in an 8-lead SOIC package and supports an extended industrial temperature range from -40°C to +125°C.

Feature Summary

• Supports sequential read operations and page write modes accommodating up to 16 bytes per cycle.
• Includes hardware write protection via the WP pin and software block protection for selective array segments.
• Features self-timed erase and write cycles with automatic internal timing control.

Applications

• Storing unique device identifiers and production batch numbers
• Saving calibration parameters and user configuration settings
• Recording operational logs and fault history

Procurement Notes

Verify that the ordering suffix 'E' corresponds to the Automotive temperature grade (-40°C to +125°C) and 'SN' indicates the 8-lead SOIC package. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure supply voltage levels align with the specified 2.5 V to 5.5 V operating range for reliable performance.

Selection Notes

Select this component when an SPI interface is required for non-volatile storage in automotive or harsh industrial environments. The 25LC020A-E variant provides wider temperature tolerance compared to Industrial grade parts. Consider the 8-byte address structure and page boundary limitations during memory mapping design to prevent data overwrite errors across physical page limits.

Part Context

This part belongs to the 25XX020A family of 2 Kbit SPI EEPROMs manufactured by Microchip Technology. It shares identical memory arrays and instruction sets with the 25AA020A model, differing primarily in operating voltage ranges and temperature specifications. The family is designed for direct interfacing with microcontrollers lacking dedicated SPI ports via software emulation.

Replacement Considerations

The 25LC020A-I/SN serves as a lower-temperature alternative within the same package. Cross-referencing with other 2 Kbit SPI EEPROMs requires verification of voltage compatibility and pinout alignment.