AT25640AN-10SU-1.8

Memory IC Overview

The AT25640AN-10SU-1.8 is a serial electrically-erasable programmable read-only memory (EEPROM) providing 65,536 bits of storage organized as 8,192 words of 8 bits each. It operates with a supply voltage range of 1.8V to 5.5V and supports SPI clock frequencies up to 20 MHz at 5V. The device features block write protection for one-quarter, one-half, or the entire array, along with hardware and software data protection mechanisms. It utilizes an 8-lead JEDEC SOIC package and offers high reliability with one million write cycle endurance and 100-year data retention.

Memory IC Feature Summary

• Supports Serial Peripheral Interface (SPI) modes 0 and 3
• Provides block write protection for specific memory segments
• Includes hardware write protect pin and software disable instructions
• Features self-timed write cycles without separate erase requirements

Memory IC Applications

• Industrial applications requiring low-power operation
• Commercial systems utilizing low-voltage logic
• Microcontroller data storage for configuration parameters
• Automotive electronic control units

Memory IC Procurement Notes

Verify the ordering suffix matches the required voltage option and package type. Confirm the component meets RoHS compliance standards if specified for the design. Ensure the industrial temperature range aligns with system operating conditions. Check for any specific lead finish requirements such as NiPdAu if applicable to the assembly process.

Memory IC Selection Notes

Select this part when 64K-bit non-volatile storage is needed with SPI interface compatibility. Consider the 1.8V to 5.5V operating range for flexible power supply designs. Evaluate the block write protection features for security-sensitive applications. Verify that the 8-lead SOIC package fits the available PCB footprint constraints.

Memory IC Part Context

This component belongs to the AT25080A/160A/320A/640A family of serial EEPROMs from Microchip Technology. The family shares common SPI interface protocols and instruction sets, differing primarily in memory density. These devices are designed for industrial and commercial use where low power consumption is critical.

Memory IC Replacement Considerations

Compatible substitutes within the same family include AT25640AN-10SU-2.7 for 2.7V minimum operation. Other package variants like AT25640A-10TU-1.8 offer TSSOP packaging. Cross-family replacements require verification of pinout and command set compatibility.