25C320-I/SN

Memory IC Overview

The Microchip Technology 25C320-I/SN is a 32 Kbit (4096 x 8 bit) serial Electrically Erasable PROM. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 3 MHz via an SPI-compatible interface. The device features industrial temperature ratings from -40 °C to +85 °C and is housed in an 8-pin SOIC package.

Memory IC Feature Summary

• Supports high-reliability operation with 1 million erase/write cycles and data retention exceeding 200 years.
• Includes built-in write protection mechanisms such as a write enable latch, power-on/off data protection, and a dedicated write-protect pin.
• Allows flexible block write protection, enabling users to protect none, one-quarter, one-half, or the entire memory array.

Memory IC Applications

• Microcontroller systems requiring non-volatile storage for configuration parameters
• Industrial control applications needing reliable data logging
• Embedded devices utilizing Serial Peripheral Interface communication

Memory IC Procurement Notes

Verify that the operating supply voltage remains strictly between 4.5 V and 5.5 V, as this variant does not support lower voltages. Confirm the industrial temperature range meets environmental requirements. Ensure the design utilizes the correct 8-pin SOIC footprint and adheres to the specified SPI timing constraints for reliable communication.

Memory IC Selection Notes

Select this component when a 3 MHz SPI interface speed is required alongside a 4.5 V to 5.5 V supply constraint. It is suitable for designs prioritizing robust hardware write protection and long-term data retention over ultra-low voltage compatibility. Consider alternative variants if operation below 4.5 V is necessary.

Memory IC Part Context

This part belongs to the 25XX320 family of 32 Kbit serial EEPROMs. It shares architectural similarities with the 25AA320 and 25LC320 but is distinguished by its specific 4.5 V to 5.5 V voltage range and 3 MHz maximum clock frequency. The 'I' suffix denotes the industrial temperature grade, while '/SN' indicates the 8-pin SOIC package type.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: 25LC320-I/SN, 25AA320-I/SN.