Microchip Technology AT25080AN-10SU-1.8

Overview

AT25080AN-10SU-1.8 from Microchip Technology (formerly Atmel) is an 8-Kbit SPI serial EEPROM organized as 1024 × 8 bits, supporting 1.8 V to 5.5 V operation, 20 MHz clock rate at 5 V, 32-byte page write mode, and hardware/software write protection via WP pin and status register. It serves as nonvolatile configuration storage in industrial control modules requiring low-voltage reliability.

For engineers reviewing the AT25080AN-10SU-1.8 datasheet, AT25080AN-10SU-1.8 pinout, AT25080AN-10SU-1.8 application, or AT25080AN-10SU-1.8 equivalent, key selection criteria include 1.8 V minimum supply, SPI Mode 0/3 compatibility, block write protection granularity (1/4–full array), HOLD pin suspend capability, and JEDEC SOIC-8 packaging with RoHS-compliant lead finish.

Technical Context

The AT25080AN-10SU-1.8 operates as a slave SPI peripheral with separate SI/SO lines, MSB-first data framing, and op-code-driven instruction set (WREN, WRITE, RDSR, WRSR). Its internal architecture includes a nonvolatile status register with BP0/BP1 for memory segmentation and WPEN for hardware write protect enable/disable.

It supports dual voltage ranges (1.8–5.5 V and 2.7–5.5 V), features self-timed 5 ms max write cycles, and delivers 1 million endurance cycles with 100-year data retention. The HOLD pin suspends ongoing serial transfers without resetting the sequence, while CS activation enables full SPI communication.

Key Specifications

Pinout & Package

AT25080AN-10SU-1.8 is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide body, RoHS-compliant, green plastic gull-wing outline with NiPdAu lead finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM applications.

Compared with M95080-DRMN6TP/K and BR24G08FJ-WE2, the AT25080AN-10SU-1.8 uniquely combines HOLD suspend, WP-enabled hardware lock, and SPI Mode 0/3 interoperability in a single SOIC-8 package-making it optimal for industrial and medical designs demanding deterministic timing and layered data protection.

Availability

AT25080AN-10SU-1.8 is available at Aetrix Electronics and suitable for industrial PLCs, portable medical devices, automotive body control units, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for AT25080AN-10SU-1.8 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology acquired Atmel in 2016 and maintains full support for the AT25xxx family of serial EEPROMs, emphasizing industrial reliability, low-power operation, and long-term supply assurance.

The AT25080AN-10SU-1.8 belongs to Microchip's legacy Atmel serial EEPROM product line, designed specifically for space-constrained, low-voltage embedded systems needing robust nonvolatile storage with flexible hardware write protection and real-time SPI suspend capability.

FAQ

What is the maximum clock frequency supported by the AT25080AN-10SU-1.8 at 1.8 V supply?

The AT25080AN-10SU-1.8 supports up to 5 MHz SCK frequency when operated at 1.8 V, as specified in Table 1-3 AC Characteristics under the 1.8–5.5 V column. This ensures reliable timing margins for low-voltage microcontrollers such as the TI MSP430FR2355 or Silicon Labs EFM32HG, while maintaining full command compatibility with its 20 MHz rating at 5 V.

Does the AT25080AN-10SU-1.8 require an external pull-up resistor on the SO pin?

No, the AT25080AN-10SU-1.8 features an actively driven SO pin with push-pull output structure, eliminating the need for external pull-up resistors. The SO pin transitions between valid logic levels (VOL/VOH) or high-impedance state-never open-drain-so external biasing is unnecessary and may cause signal integrity issues.

How does the HOLD pin function during an active write cycle in the AT25080AN-10SU-1.8?

The HOLD pin has no effect during an internal write cycle (tWC); the AT25080AN-10SU-1.8 ignores HOLD assertions until the write completes. HOLD is only functional during active SPI communication (CS low, SCK toggling), where it pauses data transfer without resetting the address counter-ensuring seamless resumption after interrupt handling.

Can the AT25080AN-10SU-1.8 be used in SPI Mode 1 or Mode 2 configurations?

No, the AT25080AN-10SU-1.8 explicitly supports only SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in the Features section. Attempting Mode 1 or Mode 2 will result in misaligned sampling and corrupted data transfers due to incompatible clock polarity and phase timing.

What happens if the WP pin is held low while the WPEN bit is '0' in the AT25080AN-10SU-1.8 status register?

When WPEN = 0, the WP pin is disabled regardless of its logic level; the AT25080AN-10SU-1.8 permits full write access to the status register and unprotected memory blocks. This allows safe initial programming in systems where WP is permanently grounded, provided WRSR is first used to clear WPEN before configuring BP bits.