25LC320-E/P

Overview

The Microchip Technology 25LC320-E/P is a 32 Kbit serial Electrically Erasable PROM featuring a 4096 x 8 bit organization. It operates within a voltage range of 2.5 V to 5.5 V and supports a maximum clock frequency of 2 MHz. The device utilizes an SPI-compatible interface with access controlled via Chip Select (CS). It includes block write protection, self-timed erase/write cycles, and built-in power-on data protection. Endurance is rated at 1 million E/W cycles with data retention exceeding 200 years. The component is housed in an 8-pin PDIP package and supports an industrial temperature range of -40 °C to +85 °C.

Feature Summary

• Supports Serial Peripheral Interface (SPI) compatible communication with separate data input and output lines.
• Includes hardware write-protect functionality controlled by the WP pin and STATUS register bits.
• Features self-timed internal write cycles initiated by raising the CS pin after data transmission.

Applications

• Data storage for microcontroller systems requiring non-volatile memory
• Configuration parameter storage in embedded devices
• Calibration data retention in industrial control applications

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range aligns with system requirements, as the 'E' suffix indicates automotive-grade temperature support but standard voltage operation. Ensure compatibility with existing SPI bus configurations before procurement.

Selection Notes

Select this component when a 32 Kbit capacity is required with robust write protection features. The 25LC320A series is recommended for new designs instead of this version. Consider the 25AA320 if lower voltage operation down to 1.8 V is necessary. Verify package availability for the specific mounting style required.

Part Context

This device belongs to the 25XX320 family of serial EEPROMs from Microchip Technology. It shares architectural similarities with the 25AA320 and 25C320 variants, differing primarily in operating voltage and speed specifications. The family is designed for direct interfacing with popular microcontroller families supporting SPI ports.

Replacement Considerations

Microchip recommends using the 25LC320A or 25AA320A for new designs. The 25LC320T-I/SN is listed as a comparable alternative part number.