AT25128AW-10SU-2.7

Memory IC Overview

The AT25128AW-10SU-2.7 is a serial electrically-erasable programmable read-only memory (EEPROM) with a density of 131,072 bits organized as 16,384 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 EIAJ SOIC package and functions within an industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports SPI Modes 0 and 3 with a 3-wire interface for data input, output, and clocking.
• Provides hardware write protection via the WP pin and software block protection for quarter, half, or entire arrays.
• Features self-timed write cycles with high endurance and long-term data retention capabilities.

Memory IC Applications

• Industrial and commercial systems requiring low-power operation
• Microcontroller data storage for configuration parameters
• Code shadowing applications in 3V systems

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required voltage option (-2.7 for 2.7V to 5.5V operation). Confirm the package type corresponds to the 8-lead EIAJ SOIC designation. Ensure compatibility with the target system's SPI mode requirements before finalizing procurement.

Memory IC Selection Notes

Select this component when a 128K-bit capacity is needed with a 2.7V minimum supply voltage. The EIAJ SOIC package is suitable for space-constrained designs. Consider the 1.8V variant if lower voltage operation is required. Verify that the 20 MHz clock speed meets the system timing constraints.

Memory IC Part Context

This part belongs to the AT25128A/256A family of serial EEPROMs manufactured by Microchip Technology (formerly Atmel). These devices are optimized for applications where low power consumption and small form factors are critical. The family offers various package options including PDIP, TSSOP, and dBGA2.

Memory IC Replacement Considerations

The AT25128AN-10SU-2.7 serves as a direct substitute, differing only in the JEDEC SOIC package format instead of the EIAJ SOIC. Both share identical electrical characteristics and pinouts.