25LC020A-H/SN

Overview

The Microchip Technology 25LC020A-H/SN is a 2K-bit (256 x 8) Serial Electrically Erasable PROM (EEPROM). It utilizes an SPI-compatible serial bus architecture with a maximum clock frequency of 5 MHz. The device operates within a supply voltage range of 2.5V to 5.5V and supports byte and page-level write operations. It features self-timed erase and write cycles with a maximum duration of 6 ms. The component is housed in an 8-lead SOIC package and is designed for extended temperature operation from -40°C to +150°C.

Feature Summary

• Supports block write protection allowing configuration to protect none, one-quarter, one-half, or the entire memory array via status register bits.
• Includes built-in power-on/off data protection circuitry and a hardware write-protect pin to inhibit programming when active.
• Provides a hold function that suspends serial communication without resetting the sequence, enabling host interruption handling.

Applications

• Storing unique device identification numbers and production batch codes
• Persisting calibration parameters and user settings
• Recording operational logs and fault history

Procurement Notes

Verify the specific ordering suffix 'H' confirms the extended temperature grade (-40°C to +150°C) and 'SN' indicates the 8-lead SOIC package. Confirm RoHS compliance and lead-free status as specified in the datasheet. Ensure the source documentation matches the preliminary DS22136B revision for accurate electrical characteristics.

Selection Notes

Select this component for applications requiring non-volatile storage of small data sets such as configuration registers or identifiers. The extended temperature rating makes it suitable for industrial environments where standard commercial grades may fail. Verify that the system voltage falls within the 2.5V to 5.5V operating range and that the SPI interface timing meets the 5 MHz maximum requirement.

Part Context

This part belongs to the 25LCXXXA family of low-density SPI EEPROMs from Microchip Technology. The family includes variants with densities ranging from 1K-bit to 4K-bit. The 'H' suffix specifically denotes the extended temperature variant, distinguishing it from standard industrial or commercial temperature grade devices within the same product line.

Replacement Considerations

Direct replacements include other 25LC020A variants with compatible packages and temperature ranges, such as 25LC020A-I/SN. Ensure substitute parts match the 8-lead SOIC footprint and support the required 5 MHz SPI clock speed.