25LC020A-E/P

Overview

The Microchip Technology 25LC020A-E/P is a 2 Kbit (256 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It features an SPI-compatible serial bus interface with a maximum clock frequency of 10 MHz at VCC levels between 4.5V and 5.5V, reducing to 5 MHz at 2.5V–4.5V. The device operates within a supply voltage range of 2.5V to 5.5V and supports page write modes of up to 16 bytes. It utilizes low-power CMOS technology with standby current as low as 1 µA. The component is housed in an 8-lead PDIP package and is rated for extended industrial temperature ranges from -40°C to +125°C.

Feature Summary

• Supports high-speed SPI communication with sequential read capabilities and self-timed erase/write cycles.
• Includes comprehensive hardware and software write protection mechanisms, including block protection and power-on data protection circuitry.
• Features a Hold input pin that allows the host to pause serial communication without resetting the sequence.

Applications

• Storage of device unique identification numbers and production batch codes
• Persistence of calibration parameters and user configuration settings
• Logging of operational status or fault records in embedded systems

Procurement Notes

Verify the specific suffix 'E' confirms the extended industrial temperature rating (-40°C to +125°C) rather than standard industrial grade. Confirm the '/P' designation corresponds to the 8-lead PDIP through-hole package. Ensure the order matches the 25LC020A variant, which requires a minimum operating voltage of 2.5V, distinct from the 25AA020A series.

Selection Notes

Select this component when an application requires non-volatile storage for small datasets such as configuration registers or serial numbers. The 25LC020A-E/P is suitable for environments demanding operation up to 125°C. Designers must ensure the system voltage remains above 2.5V. Consider the 16-byte page write limit when designing write algorithms to prevent data wrapping across page boundaries.

Part Context

This part belongs to the 25XX020A family of 2 Kbit SPI EEPROMs manufactured by Microchip Technology. The family includes variants like the 25AA020A, which differs primarily in its lower voltage support starting at 1.8V. The 25LC020A specifically targets applications requiring robust performance at standard 3.3V or 5V logic levels with extended thermal tolerance.

Replacement Considerations

The 25LC020A-I/P serves as a direct functional substitute if the extended temperature range is not required. The 25AA020A-E/P offers identical functionality but supports lower voltages down to 1.8V. Cross-referencing datasheets is necessary to confirm voltage compatibility and temperature specifications before substitution.