AT25640AN-10SU-2.7

Memory IC Overview

The AT25640AN-10SU-2.7 is a 64Kbit (8192 x 8) serial electrically-erasable programmable read-only memory (EEPROM) manufactured by Microchip Technology. It operates within a supply voltage range of 2.7V to 5.5V and supports SPI clock frequencies up to 20 MHz at 5V. The device utilizes an 8-lead JEDEC SOIC package and functions as a slave in synchronous serial peripheral interface communications.

Memory IC Feature Summary

• Supports SPI Modes 0 and 3 with a three-wire interface consisting of Serial Data Input, Serial Data Output, and Serial Clock pins.
• Provides hardware write protection via the WP pin and software-based block write protection for one-quarter, one-half, or the entire array.
• Features self-timed write cycles that eliminate the need for separate erase cycles before programming.
• Includes a HOLD pin to suspend serial communication without resetting the sequence.

Memory IC Applications

• Industrial applications requiring low-power operation
• Commercial applications utilizing microcontrollers
• Systems needing non-volatile data storage

Memory IC Procurement Notes

Verify the specific ordering suffix 'AN' corresponds to the industrial temperature range and lead-free compliance as defined in the manufacturer's documentation. Confirm the '2.7' suffix indicates the minimum operating voltage requirement of 2.7V rather than 1.8V. Ensure the package type matches the required 8-lead JEDEC SOIC footprint for PCB integration.

Memory IC Selection Notes

Select this component when a 64Kbit capacity is required with SPI compatibility. Choose the 2.7V variant if the system supply voltage does not drop below 2.7V. Consider the 1.8V variant if lower voltage operation down to 1.8V is necessary. Verify that the 8-lead SOIC package fits the available board space.

Memory IC Part Context

This part belongs to the AT25080A/160A/320A/640A family of serial EEPROMs. These devices are optimized for industrial and commercial use where low power consumption is critical. The family shares identical instruction sets and interface protocols, differing primarily in memory density and package options.

Memory IC Replacement Considerations

Compatible substitutes include other parts from the AT25080A/160A/320A/640A family with matching 64Kbit capacity and 8-lead SOIC packaging. Verify that any replacement supports the same SPI modes and voltage range.