25LC320A-E/P

Overview

The Microchip Technology 25LC320A-E/P 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 VCC levels between 4.5V and 5.5V, reducing to 5 MHz at 2.5V to 4.5V. The device supports a supply voltage range of 2.5V to 5.5V and functions within an extended temperature range of -40°C to +125°C. It utilizes an 8-lead PDIP package for through-hole mounting.

Feature Summary

• Supports high-speed serial communication via SPI interface with up to 10 MHz clock capability
• Includes hardware write protection mechanisms such as block protection and power-on data protection circuitry
• Features self-timed erase and write cycles with automatic internal timing control
• Provides hold functionality to pause serial transmission without resetting the sequence

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range aligns with the system design, as this variant specifies a minimum operating voltage of 2.5V. Ensure compatibility with the host microcontroller's SPI protocol settings before finalizing procurement.

Selection Notes

Select this component when an extended industrial temperature range up to 125°C is required alongside standard SPI connectivity. It serves as a direct upgrade path for designs previously using lower-speed EEPROMs, offering increased throughput while maintaining pinout compatibility with other packages in the series.

Part Context

This part belongs to the 25LC320A family, which expands Microchip's 32 Kb SPI serial EEPROM portfolio. The 'E' designation indicates the extended temperature grade suitable for harsh environments. The 'P' suffix identifies the 8-lead Plastic Dual In-Line Package, facilitating easy integration into through-hole PCB layouts.

Replacement Considerations

Devices sharing the same memory architecture and pin configuration may serve as alternatives. Verify that any substitute maintains the 2.5V to 5.5V operating voltage range and supports the necessary SPI clock speeds for the target application.