25C320/SN

Memory IC Overview

The Microchip Technology 25C320/SN is a 32 Kbit (4096 x 8) serial Electrically Erasable PROM accessed via an SPI-compatible bus. It operates within a VCC range of 4.5V to 5.5V with a maximum clock frequency of 3 MHz. The device supports industrial temperature ranges (-40°C to +85°C) and automotive grades (-40°C to +125°C). Key electrical characteristics include a typical standby current of 500 nA, read current of 500 μA, and write current of 3 mA maximum. It features self-timed erase/write cycles with a maximum duration of 5 ms.

Memory IC Feature Summary

• Supports block write protection allowing configuration to protect none, one-quarter, one-half, or the entire memory array.
• Includes built-in power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes.
• Provides hardware write protection via the WP pin in conjunction with the STATUS register WPEN bit.

Memory IC Applications

• Microcontroller system data storage
• Configuration parameter retention
• Calibration value storage

Memory IC Procurement Notes

Verify the specific suffix '/SN' corresponds to the SOIC-8 package type required for your design. Confirm that the operating voltage supply strictly adheres to the 4.5V to 5.5V specification, as this variant differs from lower-voltage counterparts. Ensure the industrial or automotive temperature grade matches your environmental requirements before finalizing procurement.

Memory IC Selection Notes

Select this component when a 4.5V to 5.5V supply rail is available and a 3 MHz SPI interface speed is sufficient. It serves as a high-reliability alternative to lower-speed variants like the 25LC320. Consider the 8-pin SOIC package constraints and ensure the application benefits from the dedicated hardware write-protect capabilities provided by the WP pin and STATUS register.

Memory IC Part Context

The 25C320 belongs to the 25XX320 family of 32 Kbit serial EEPROMs manufactured by Microchip Technology. This series includes variants such as the 25AA320 and 25LC320, differentiated primarily by their operating voltage ranges and maximum clock frequencies. The 25C320 specifically targets applications requiring the standard 5V logic levels and higher performance compared to the 2.5V or 1.8V optimized versions.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: None listed in source material.