25LC320AXT-I/ST

Overview

The Microchip Technology 25LC320AXT-I/ST is a 32-Kbit Serial Electrically Erasable PROM featuring a 4096 x 8-bit organization. It operates via an SPI-compatible serial bus with a maximum clock frequency of 10 MHz at VCC voltages between 4.5V and 5.5V. The device supports a supply voltage range of 2.5V to 5.5V and utilizes an 8-lead TSSOP package. It includes a 32-byte page buffer, self-timed erase/write cycles with a maximum duration of 5 ms, and block write protection capabilities.

Feature Summary

• Supports high-speed SPI communication with up to 10 MHz clock frequency
• Includes hardware write protection via the WP pin and software control through the STATUS register
• Features a HOLD input to pause serial transmission without resetting the sequence
• Provides data retention exceeding 200 years and endurance over 1 million erase/write cycles

Applications

• Microcontroller system configuration storage
• Calibration data and parameter logging
• Non-volatile memory for industrial control systems

Procurement Notes

Verify that the ordering suffix 'XT' corresponds to the specific tape-and-reel packaging variant required for automated assembly processes. Confirm the temperature grade 'I' meets the operational requirements of -40°C to +85°C. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability according to manufacturer specifications.

Selection Notes

Select this part when a 32-Kbit EEPROM with SPI interface is required for applications needing extended temperature operation up to +125°C. The 25LC320A series is suitable for designs operating within a 2.5V to 5.5V supply range. Consider the TSSOP package for surface-mount applications requiring compact footprint solutions.

Part Context

This component belongs to the 25LC320A family of 32-Kbit Serial EEPROMs manufactured by Microchip Technology. The family shares identical electrical characteristics and functional descriptions, differing primarily in supply voltage ranges and temperature grades. The 'LC' designation indicates the 2.5V to 5.5V operating range, distinguishing it from the 1.8V-capable 25AA320A series.

Replacement Considerations

Direct substitutes include other variants within the 25LC320A family such as 25LC320AT-I/ST or 25LC320A-E/ST, provided the package type and temperature grade align with design constraints.