25LC320AT-E/MNY

Overview

The Microchip Technology 25LC320AT-E/MNY is a 32-Kbit Serial Electrically Erasable PROM featuring a 4096 x 8-bit organization. It operates on 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 includes a 32-byte page write buffer. It offers high reliability with over 1 million erase/write cycles and data retention exceeding 200 years. The component is housed in an 8-lead MSOP package and is qualified for the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Supports sequential read operations and self-timed erase/write cycles up to 5 ms maximum duration.
• Includes built-in write protection mechanisms such as power-on/off data protection, a write enable latch, and a dedicated write-protect pin.
• Features block write protection allowing configuration to protect none, one-quarter, one-half, or all of the memory array.
• Provides a Hold input function to pause serial communication without resetting the sequence.

Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Industrial control applications operating within extended temperature ranges
• Embedded systems utilizing SPI bus interfaces

Procurement Notes

Verify that the specific ordering suffix matches the required temperature grade and package type. Confirm the device meets AEC-Q100 qualification standards if automotive compliance is necessary. Ensure the supply voltage requirements align with the system design constraints before procurement.

Selection Notes

Select this part when an SPI interface is preferred over I2C protocols. Choose the Extended (E) temperature grade for environments exceeding standard industrial limits. Consider the MSOP package dimensions for PCB layout compatibility. Verify that the 32-byte page size fits the application's write granularity requirements.

Part Context

This component belongs to the 25LC320A series of 32-Kbit Serial EEPROMs manufactured by Microchip Technology. The series utilizes low-power CMOS technology and is designed for direct interfacing with popular microcontroller families. It serves as a reliable non-volatile storage solution for small data sets in embedded applications.

Replacement Considerations

The 25AA320AT-E/MNY is a comparable alternative within the same datasheet, offering similar functionality but with a wider supply voltage range starting from 1.8V instead of 2.5V. Other variants in the 25XX320A family may differ in package style or temperature rating.