25AA256T-I/MF

Memory IC Overview

The Microchip Technology 25AA256T-I/MF is a 256 Kbit Serial Electrically Erasable PROM featuring a 32,768 x 8-bit organization. It utilizes an SPI-compatible serial bus interface with a maximum clock frequency of 10 MHz. The device operates within a supply voltage range of 1.8V to 5.5V and supports industrial temperature ranges from -40°C to +85°C. It is housed in an 8-lead DFN-S package (6x5 mm) and includes self-timed erase/write cycles.

Memory IC Feature Summary

• Supports low-power CMOS technology for reduced current consumption during read, write, and standby operations.
• Includes built-in hardware write protection mechanisms such as power-on/off data protection and a dedicated write-protect pin.
• Features block write protection allowing selective protection of none, one-quarter, one-half, or the entire memory array.

Memory IC Applications

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

Memory IC Procurement Notes

Verify the specific suffix 'I/MF' corresponds to the Industrial temperature grade (-40°C to +85°C) and the 8-lead DFN-S package format. Confirm RoHS compliance status and ensure the ordering quantity matches the manufacturer's standard packaging requirements for tape and reel distribution.

Memory IC Selection Notes

Select this component when a compact surface-mount footprint is required alongside SPI interface compatibility. Ensure the application voltage remains within the 1.8V to 5.5V operational range. Consider the 64-byte page size limitation for write operations and verify that the physical layout accommodates the exposed pad thermal design requirements of the DFN package.

Memory IC Part Context

This part belongs to the 25XX256 family of Serial EEPROMs manufactured by Microchip Technology. It shares functional specifications with variants like the 25LC256 but differs in minimum operating voltage and package options. The 'MF' suffix specifically denotes the 8-lead DFN-S plastic package type.

Memory IC Replacement Considerations

25AA256T-I/ST

Memory IC FAQ

How does the HOLD pin function during serial communication?

The HOLD pin allows the host to pause serial communication without resetting the sequence. When pulled low while SCK is low, it places inputs in a high-impedance state until pulled high again.

What happens if a page write crosses a physical page boundary?

If a page write command attempts to cross a physical page boundary, the data wraps around to the beginning of the current page instead of writing to the next page.