25LC320A-E/MS

Overview

The Microchip Technology 25LC320A-E/MS 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 supply voltages between 2.5 V and 5.5 V. The device supports sequential reads, self-timed erase/write cycles up to 5 ms, and block write protection. It includes built-in power-on/off data protection and a hold pin for pausing transmission. The component is housed in an 8-lead MSOP package and supports extended temperature ranges from -40°C to +125°C.

Feature Summary

• Supports high-speed SPI communication with a maximum clock frequency of 10 MHz
• Includes programmable block write protection for array segments
• Features hardware write-protect pin and power-on/off data protection circuitry
• Provides a hold function to pause serial sequences without resetting the address pointer

Applications

• Microcontroller system data storage
• Industrial control applications requiring extended temperature operation
• Automotive electronics systems
• Embedded devices needing non-volatile configuration storage

Procurement Notes

Verify that the specific ordering suffix matches the required voltage range and temperature grade. Confirm the package type corresponds to the design layout. Check for RoHS compliance status and ensure the source document aligns with the requested revision level. Validate availability through authorized distributors.

Selection Notes

Select this part when a 32-Kbit capacity with SPI interface is required. Choose the 'E' suffix for extended temperature operation up to +125°C. Ensure the system voltage remains within the 2.5 V to 5.5 V range. Consider page write limits if large data blocks are transferred frequently.

Part Context

This component belongs to the 25XX320A family of 32-Kbit SPI Serial EEPROMs. It shares architectural similarities with the 25AA320A but differs in operating voltage specifications. The series utilizes PMOS electrically erasable cell technology for high reliability and endurance.

Replacement Considerations

Direct replacements include other 25LC320A variants with different packages such as SOIC or TSSOP. Cross-reference with 25AA320A parts only if the lower voltage start point is acceptable.