Microchip Technology AT25020AY1-10YI-2.7

Overview

AT25020AY1-10YI-2.7 from Microchip Technology (formerly Atmel) is a 2-Kbit SPI serial EEPROM organized as 256 words × 8 bits, operating from 2.7V to 5.5V with 20 MHz max clock rate at 5V, 8-byte page write capability, and hardware/software write protection-used for configuration storage in automotive control modules, industrial PLCs, and embedded sensor nodes.

For engineers reviewing the AT25020AY1-10YI-2.7 datasheet, AT25020AY1-10YI-2.7 pinout, AT25020AY1-10YI-2.7 application, or AT25020AY1-10YI-2.7 equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), 8-lead MAP package (4.90 mm × 3.00 mm), block write protection levels, self-timed 5 ms write cycle, and SPI Mode 0/3 compatibility.

Technical Context

The AT25020AY1-10YI-2.7 implements a synchronous SPI slave interface with dedicated SI/SO pins, CS-driven selection, and HOLD/ WP control lines. It uses an 8-bit instruction register with MSB-first transmission and supports four block write protection configurations via nonvolatile BP1/BP0 bits in the status register.

Its memory array is partitioned into four segments; write enable (WREN) must precede WRITE or WRSR instructions, and internal write cycles ignore all commands except RDSR. The device powers up in write-disabled state and features automatic address increment during sequential reads.

Key Specifications

Pinout & Package

AT25020AY1-10YI-2.7 is housed in an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, non-leaded, dual footprint compatible with SOIC/TSSOP layouts. Pin 1 is marked by index area on top view.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95256-DRMN6TP/K and BR25H200FJ-WE2, the AT25020AY1-10YI-2.7 offers optimal balance of industrial temperature rating, 2.7V compatibility, compact MAP footprint, and proven AEC-Q100 qualification - making it preferred for space-constrained automotive and industrial designs where voltage flexibility and qualification are primary drivers.

Availability

AT25020AY1-10YI-2.7 is available at Aetrix Electronics and suitable for automotive ECU configuration, industrial sensor calibration, and medical device settings backup requiring stable component supply across extended product lifecycles.

Supply support for AT25020AY1-10YI-2.7 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 semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with broad industrial and automotive qualification expertise.

The AT25020AY1-10YI-2.7 belongs to Microchip's legacy Atmel SPI EEPROM family, designed specifically for reliable, low-power, pin-efficient configuration storage in harsh-environment embedded systems.

FAQ

What is the memory organization of the AT25020AY1-10YI-2.7?

The AT25020AY1-10YI-2.7 contains 2048 bits of serial EEPROM memory organized as 256 words × 8 bits. This structure supports byte-addressable access with automatic address increment during sequential reads, enabling efficient retrieval of contiguous configuration data without repeated address transmission. The AT25020AY1-10YI-2.7 uses this layout to simplify firmware implementation in resource-constrained microcontrollers.

Does the AT25020AY1-10YI-2.7 support both SPI Mode 0 and Mode 3?

Yes, the AT25020AY1-10YI-2.7 explicitly supports SPI Modes 0 (CPOL = 0, CPHA = 0) and 3 (CPOL = 1, CPHA = 1), as confirmed in its official datasheet. The AT25020AY1-10YI-2.7 operates as a slave device with separate SI and SO pins, and its timing diagrams validate compatibility with both modes across the full 2.7–5.5V supply range.

What package type is used for the AT25020AY1-10YI-2.7?

The AT25020AY1-10YI-2.7 uses an 8-lead Miniature Array Package (MAP) with 4.90 mm × 3.00 mm body dimensions, non-leaded construction, and dual footprint compatibility. This compact surface-mount package is documented as "8Y1" in Microchip's ordering information and provides board-area savings over standard SOIC or TSSOP variants while maintaining thermal and mechanical reliability.

How does hardware write protection work on the AT25020AY1-10YI-2.7?

Hardware write protection on the AT25020AY1-10YI-2.7 is implemented via the WP (Write Protect) pin: when driven low, it inhibits all write operations-including WRITE, WRSR, and WREN-regardless of the status register setting. The AT25020AY1-10YI-2.7 maintains this lock until WP returns high, providing fail-safe prevention of unintended memory modification during power transitions or noise events.

What is the maximum write endurance and data retention for the AT25020AY1-10YI-2.7?

The AT25020AY1-10YI-2.7 guarantees 1 million write/erase cycles and 100 years of data retention at +25°C, as characterized and specified in its datasheet. These values are validated across the industrial temperature range (−40°C to +85°C) and form the basis for long-term reliability in automotive and industrial applications where field replacement is costly or impractical. The AT25020AY1-10YI-2.7 meets these specs without derating under normal operating conditions.