Microchip Technology AT25080AN-10SI-2.7-T

Overview

AT25080AN-10SI-2.7-T from Microchip Technology (formerly Atmel) is a 8K-bit SPI serial EEPROM organized as 1024 × 8 bits, operating from 2.7V to 5.5V, supporting 20 MHz clock rate at 5V, featuring 32-byte page write and hardware/software write protection via WP pin and status register. It is used in industrial control systems for firmware parameter storage and calibration data retention.

For engineers reviewing the AT25080AN-10SI-2.7-T datasheet, AT25080AN-10SI-2.7-T pinout, AT25080AN-10SI-2.7-T application, or AT25080AN-10SI-2.7-T equivalent, key selection criteria include SPI Mode 0/3 compatibility, 1 million write endurance, 100-year data retention, -40°C to +85°C industrial temperature range, and JEDEC SOIC-8 packaging with lead-free/halogen-free compliance.

Technical Context

The AT25080AN-10SI-2.7-T implements a synchronous serial peripheral interface (SPI) slave architecture with separate SI/SO pins, MSB-first data transfer, and op-code–driven command execution. It requires WREN before WRITE and supports HOLD pin–based communication suspension without sequence reset.

Block write protection is controlled by nonvolatile BP0/BP1 bits in the status register, enabling 0%, 25%, 50%, or 100% memory array protection. The WP pin enables hardware-level status register lock when WPEN = 1, while software write disable (WRDI) provides independent protection independent of WP state.

Key Specifications

Pinout & Package

AT25080AN-10SI-2.7-T is packaged in an 8-lead JEDEC SOIC (8S1), 0.150" wide body, RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95080-DRMN3TP/K and BR24G08NUX-10, the AT25080AN-10SI-2.7-T uniquely delivers HOLD support, consistent 20 MHz performance across its 2.7–5.5V range, and verified 1M/100yr reliability - making it optimal for industrial systems requiring robust, field-serviceable nonvolatile storage.

Availability

AT25080AN-10SI-2.7-T is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AT25080AN-10SI-2.7-T 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 is a global provider of microcontrollers, analog, FPGA, and memory solutions, delivering scalable, secure, and reliable semiconductor products for embedded control and connectivity.

The AT25080AN-10SI-2.7-T belongs to Microchip's legacy Atmel SPI EEPROM family, designed specifically for cost-sensitive, low-power industrial and automotive applications requiring guaranteed data integrity and long-term retention without battery backup.

FAQ

What is the maximum SPI clock frequency supported by the AT25080AN-10SI-2.7-T?

The AT25080AN-10SI-2.7-T supports up to 20 MHz SCK frequency at VCC = 5.0V. At 2.7V, the maximum rated clock drops to 10 MHz per AC characteristics tables. This voltage-dependent timing ensures reliable operation across its full 2.7–5.5V supply range. Always verify timing margins using tWH/tWL values from the datasheet for your specific VCC and temperature conditions. The AT25080AN-10SI-2.7-T does not support overclocking beyond these specifications.

Does the AT25080AN-10SI-2.7-T require an external erase cycle before writing?

No, the AT25080AN-10SI-2.7-T performs fully self-timed write operations with no separate erase cycle required. Each WRITE instruction automatically handles erase-and-program internally. A Write Enable (WREN) instruction must precede every WRITE, and the device returns to write-disable state after each completed write cycle. The AT25080AN-10SI-2.7-T achieves this using floating-gate technology optimized for single-step programming, eliminating erase overhead in firmware design.

How does the HOLD pin function on the AT25080AN-10SI-2.7-T?

The HOLD pin on the AT25080AN-10SI-2.7-T suspends ongoing SPI communication without resetting the internal address counter or command state. To activate HOLD, drive the pin low while SCK is low; to resume, bring HOLD high while SCK remains low. During HOLD, SI inputs are ignored and SO enters high-impedance. This enables master devices to temporarily halt transfers - for example, during interrupt servicing - and resume seamlessly. The AT25080AN-10SI-2.7-T guarantees correct behavior only when HOLD timing constraints (tHD, tCD) are met.

What memory organization does the AT25080AN-10SI-2.7-T use?

The AT25080AN-10SI-2.7-T organizes its 8192 bits as 1024 words of 8 bits each (1024 × 8). Addressing uses A9–A0 (10 bits), with higher address bits (A15–A10) as don't-care. This linear layout simplifies firmware access - a single 16-bit address pointer covers the entire array. Page boundaries align to 32-byte increments (addresses 0x000–0x01F, 0x020–0x03F, etc.), enabling efficient page-write optimization in host drivers. The AT25080AN-10SI-2.7-T does not implement sector or block erase; all writes target individual bytes or pages.

Is the AT25080AN-10SI-2.7-T compatible with 1.8V systems?

No, the AT25080AN-10SI-2.7-T is specified for 2.7V to 5.5V operation only, as indicated by the "-2.7" suffix in its ordering code. For 1.8V systems, Microchip offers the AT25080AN-10SI-1.8 variant, which shares the same SOIC-8 package and feature set but is characterized down to 1.8V. Using the AT25080AN-10SI-2.7-T below 2.7V risks unreliable read/write behavior, invalid timing margins, and potential data corruption. Always match the voltage suffix to the system's VCC rail.