AT25040AN-10SQ-2.7 – SPI Serial EEPROM – Microchip (Atmel)

The AT25040AN-10SQ-2.7 is a 4Kbit (512 x 8) SPI serial EEPROM from Atmel (now Microchip Technology) in an 8-lead SOIC package, rated for 2.7V to 5.5V operation. This obsolete, hard-to-find device is available for RFQ at Pacific Component Xchange.

The AT25040AN-10SQ-2.7 is a 4-Kilobit (4,096-bit) SPI serial EEPROM originally manufactured by Atmel and now part of the Microchip Technology portfolio. The device stores data in an organization of 512 words by 8 bits each (512 x 8) and communicates over the industry-standard Serial Peripheral Interface (SPI), supporting SPI Modes 0 (0,0) and 3 (1,1). The “-2.7” option specifies low-voltage operation across a 2.7V to 5.5V supply range, while the 8-lead SOIC (“S” / JEDEC 8S1) package makes it well suited to space-constrained, surface-mount industrial and commercial designs.

Member of the AT25010A/020A/040A family, this EEPROM is optimized for low-power, low-voltage operation and offers robust data-protection features, making it a popular choice for non-volatile configuration, calibration, and parameter storage. Please note that this part is marked “Not Recommended for New Design” by the manufacturer and is now obsolete, which is why it is offered here as a hard-to-find sourcing solution.

Key Features

• 4 Kbit (4,096 bits) serial EEPROM, organized as 512 x 8
• Serial Peripheral Interface (SPI) compatible; supports SPI Modes 0 (0,0) and 3 (1,1)
• Low-voltage operation: 2.7V to 5.5V (VCC) for the “-2.7” option
• 20 MHz clock rate (at 5V)
• 8-byte page write mode
• Block write protection: protect 1/4, 1/2, or entire array
• Hardware and software write protection via Write Protect (WP) pin and write-disable instructions
• Self-timed write cycle (5 ms max)
• HOLD pin to suspend serial communication
• High reliability: 1,000,000 write cycle endurance; 100-year data retention
• 8-lead SOIC (JEDEC 8S1) package
• Industrial temperature range: -40°C to +85°C

Applications

• Non-volatile storage of configuration and setup parameters
• Calibration and trim data storage
• Industrial and commercial embedded controllers
• Consumer electronics and appliances
• Networking and telecom equipment ID/EEPROM
• Legacy system repair, maintenance, and last-time-buy replacements

Why Source AT25040AN-10SQ-2.7 from Pacific Component Xchange

Pacific Component Xchange is an independent distributor specializing in hard-to-find, end-of-life, and obsolete memory components. Because the AT25040AN-10SQ-2.7 is obsolete and has little to no authorized-distributor availability, sourcing it for production repairs, last-time buys, and legacy builds can be challenging. We help engineers and purchasing teams keep mature designs in production by locating verified inventory through our global supply network.

Every order is backed by our commitment to authenticity, quality inspection, and counterfeit-avoidance practices, with worldwide shipping to wherever your build takes place. Request a quote (RFQ) today and our team will respond promptly with pricing, lead time, and availability for the AT25040AN-10SQ-2.7.