25LC020A-I/P

Overview

The Microchip Technology 25LC020A-I/P is a 2 Kbit (256 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It interfaces via a standard SPI compatible serial bus with a maximum clock frequency of 10 MHz at VCC voltages between 4.5V and 5.5V. The device operates within a supply voltage range of 2.5V to 5.5V and supports an industrial temperature range of -40°C to +85°C. It features low-power CMOS technology, offering standby currents as low as 1 µA and read/write currents up to 5 mA. The memory provides high reliability with 1,000,000 erase/write cycle endurance and data retention exceeding 200 years.

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 block protection for none, 1/4, 1/2, or all of the array.
• Features power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes.
• Provides a HOLD input to pause serial communication without resetting the sequence.

Applications

• Storing calibration parameters and configuration settings in microcontroller systems.
• Recording production batch numbers and device unique identifiers.
• Maintaining simple fault logs or operational history in embedded devices.

Procurement Notes

Verify that the ordering suffix matches the required package type, as the 'I/P' designation specifically indicates the Industrial temperature grade and PDIP-8 package. Confirm the voltage requirements align with the system design, noting that the LC variant requires a minimum of 2.5V compared to the AA variant's 1.8V minimum. Ensure ESD precautions are observed during handling due to the sensitivity of the CMOS structure.

Selection Notes

Select this component when a robust, non-volatile storage solution is needed for small data sets requiring frequent updates. The SPI interface simplifies integration with microcontrollers lacking dedicated I2C controllers. Consider the PDIP-8 package if through-hole mounting is preferred for prototyping or specific mechanical constraints. Verify that the system voltage remains above 2.5V to ensure proper operation across the full industrial temperature range.

Part Context

This part belongs to the 25XX020A family of 2 Kbit SPI EEPROMs from Microchip Technology. The family includes variants like the 25AA020A, which shares identical functionality but supports a lower voltage range starting at 1.8V. The 25LC020A is specifically optimized for applications operating strictly within the 2.5V to 5.5V range, providing compatibility with standard 3.3V and 5V logic levels commonly found in industrial control environments.

Replacement Considerations

The 25AA020A serves as a functional substitute if the application requires support for lower supply voltages down to 1.8V. Other capacity upgrades within the same SPI interface family include the 25LC040 (4 Kbit) and 25LC080 (8 Kbit), which maintain similar instruction sets and timing characteristics while offering increased storage density.