25LC020AT-I/OT

Overview

The Microchip Technology 25LC020AT-I/OT is a 2 Kbit (256 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It utilizes a standard SPI-compatible serial bus for data access, supporting a maximum clock frequency of 10 MHz. The device operates within a supply voltage range of 2.5V to 5.5V and supports industrial temperature grades from -40°C to +85°C. It features low-power CMOS technology with standby current as low as 5 µA. The memory includes self-timed erase and write cycles with a maximum duration of 5 ms.

Feature Summary

• Supports sequential read operations and page write modes allowing up to 16 bytes per cycle.
• Includes built-in hardware write protection via the WP pin and software-controlled block protection.
• Features power-on/off data protection circuitry and a write enable latch mechanism.
• Provides a HOLD input function to pause serial communication without resetting the sequence.

Applications

• Storing device unique identification numbers and production batch codes
• Saving calibration parameters and user configuration settings
• Recording operational logs or fault history in embedded systems

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature grade (-40°C to +85°C) and 'OT' denotes the X-Rotated TSSOP package. Confirm the 'LC' prefix indicates the 2.5V minimum operating voltage requirement. Ensure the datasheet version matches the specific revision for accurate electrical characteristics and timing diagrams.

Selection Notes

Select this component when an SPI interface is preferred over I2C for simpler protocol implementation and higher speed requirements up to 10 MHz. Choose the 25LC020AT variant specifically if the system requires a minimum operating voltage of 2.5V rather than 1.8V. Consider the X-Rotated TSSOP package only if board space constraints match its specific footprint dimensions.

Part Context

This part belongs to the 25XX020A family of 2Kbit SPI EEPROMs manufactured by Microchip Technology. It shares identical instruction sets, memory arrays, and functional behavior with the 25AA020A series. The primary distinction lies in the operating voltage range, where the LC variant requires a minimum of 2.5V compared to the AA variant's 1.8V minimum.

Replacement Considerations

The 25LC020A-I/MS serves as a direct package alternative using the standard MSOP-8 form factor. For applications requiring a lower minimum voltage of 1.8V, the 25AA020AT-I/OT is functionally compatible regarding interface and capacity.