AT25640AY1-10YI-2.7

Memory IC Overview

The AT25640AY1-10YI-2.7 is a serial electrically-erasable programmable read-only memory (EEPROM) with a capacity of 65,536 bits organized as 8,192 words of 8 bits each. 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 Miniature Array Package (MAP) and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports Serial Peripheral Interface (SPI) modes 0 and 3 for synchronous data transfer
• Provides hardware write protection via the WP pin and software block write protection
• Features self-timed write cycles with automatic return to standby state
• Includes a HOLD pin to pause serial communication without resetting the sequence

Memory IC Applications

• Industrial control systems requiring low-power non-volatile storage
• Commercial applications needing reliable data retention
• Embedded devices utilizing SPI-compatible microcontrollers

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and voltage rating. Confirm the component meets the specified industrial temperature range and lead-free/halogen-free requirements. Ensure compatibility with the system's SPI interface timing constraints before finalizing procurement.

Memory IC Selection Notes

Select this component when a 64K-bit EEPROM is required with a compact MAP footprint. Choose this variant over other packages if board space is limited. Ensure the design accommodates the 2.7V minimum supply voltage requirement for the specific application environment.

Memory IC Part Context

This part belongs to the AT25080A/160A/320A/640A family of SPI Serial EEPROMs manufactured by Microchip Technology. The family shares identical functional architectures and instruction sets, differing primarily in memory density and physical package options. This specific model represents the highest density option in the series.

Memory IC Replacement Considerations

Compatible substitutes include AT25640AN-10SI-2.7 and AT25640A-10TI-2.7. These alternatives offer identical electrical specifications but utilize different package formats such as SOIC or TSSOP.