25LC320/SN

Overview

The Microchip Technology 25LC320/SN is a 32 Kbit (4096 x 8 bit) serial Electrically Erasable PROM accessed via an SPI-compatible bus. It operates within a voltage range of 2.5 V to 5.5 V with a maximum clock frequency of 2 MHz. The device supports industrial temperature ranges from -40 °C to +85 °C and features a 32-byte page size. Key electrical characteristics include a typical read current of 500 μA, standby current of 500 nA, and write current of 3 mA maximum.

Feature Summary

• Supports block write protection for none, 1/4, 1/2, or all array segments
• Includes built-in power on/off data protection circuitry
• Features a hold pin to pause serial communication without resetting the sequence
• Provides hardware write-protect functionality via the WP pin

Applications

• Microcontroller system data storage
• Industrial control applications
• Embedded systems requiring non-volatile memory
• Automotive electronics environments

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range aligns with the target application's supply specifications. Ensure compatibility with existing SPI bus configurations before procurement. Cross-reference datasheet revisions to confirm feature consistency.

Selection Notes

Select this component for designs requiring low-power serial EEPROM with hardware write protection. Consider the 2 MHz clock speed and 32-byte page write capability for performance requirements. Evaluate the PDIP or SOIC package options based on board space constraints. Verify operating temperature limits match the environmental conditions.

Part Context

This device belongs to the 25XX320 family, which includes variants like the 25AA320 and 25C320. These parts share similar architectures but differ in voltage ranges and clock speeds. The 25LC320 specifically targets industrial applications with a 2.5 V to 5.5 V supply range. It serves as a standard solution for small-scale non-volatile data retention tasks.

Replacement Considerations

Datasheets indicate the 25LC320A series as a recommended alternative for new designs. Verify pinout compatibility and electrical parameter overlaps before substitution. Check for any changes in instruction sets or timing requirements between generations.