Microchip Technology AT25080AY1-10YU-1.8

Overview

AT25080AY1-10YU-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, and hardware/software write protection. It serves as nonvolatile configuration storage in industrial control modules, sensor nodes, and power management ICs requiring low-voltage reliability.

For engineers reviewing the AT25080AY1-10YU-1.8 datasheet, AT25080AY1-10YU-1.8 pinout, AT25080AY1-10YU-1.8 application, or AT25080AY1-10YU-1.8 equivalent, key selection criteria include 1.8 V minimum supply, 5 ms max write cycle time, HOLD/CS/SCK/SI/SO/WP/GND/VCC 8-pin interface, block write protection granularity, and compatibility with SPI Mode 0 and Mode 3.

Technical Context

The AT25080AY1-10YU-1.8 operates as a slave SPI peripheral with separate SI (input) and SO (output) pins, MSB-first data framing, and op-code–driven instruction set (WREN, WRITE, READ, RDSR, WRSR). It uses a status register with nonvolatile BP0/BP1 bits for 0%, 25%, 50%, or 100% array protection and WPEN bit to enable/disable hardware write protect via the WP pin.

Internal self-timed write cycles eliminate external timing control; no erase step precedes write. The HOLD pin suspends ongoing serial transfers without resetting the sequence, and CS must transition low before each instruction. Write Enable Latch (WEN bit) must be set prior to any WRITE or WRSR command.

Key Specifications

Pinout & Package

AT25080AY1-10YU-1.8 is packaged in an 8-lead Ultra Thin Mini-MAP (MLP 2×3 mm), RoHS-compliant, lead-free, dual no-lead package (8Y6 footprint per ordering info). Pin 1 index is marked on top surface; bottom-side terminals are exposed copper pads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with M95080-DRMN3TP/K and BR24G08FJ-WE2, AT25080AY1-10YU-1.8 provides unique HOLD pin support for deterministic SPI suspension and consistent 20 MHz performance down to 1.8 V-advantageous in real-time industrial controllers requiring guaranteed bus response.

Availability

AT25080AY1-10YU-1.8 is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration storage, and smart energy meter firmware settings requiring stable component supply and long-term obsolescence planning.

Supply support for AT25080AY1-10YU-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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with emphasis on embedded control and secure connectivity.

The AT25080AY1-10YU-1.8 belongs to Microchip's AT25xxxA SPI EEPROM product line, designed for reliable, low-voltage nonvolatile storage in industrial, medical, and communications equipment where robustness and long data retention are essential.

FAQ

What is the memory organization of the AT25080AY1-10YU-1.8?

The AT25080AY1-10YU-1.8 contains 8192 bits of serial EEPROM organized as 1024 words × 8 bits. This structure supports byte-addressable reads and writes, with address range A9–A0 (10-bit addressing), and is optimized for compact configuration storage in resource-constrained systems. The AT25080AY1-10YU-1.8 does not support word or multi-byte burst access.

Does the AT25080AY1-10YU-1.8 support SPI Mode 3, and how is it configured?

Yes, the AT25080AY1-10YU-1.8 supports both SPI Mode 0 (CPOL = 0, CPHA = 0) and Mode 3 (CPOL = 1, CPHA = 1) as stated in its features. No internal register setting is required-the device automatically adapts to the master's clock polarity and phase. The AT25080AY1-10YU-1.8 samples SI on the first clock edge and shifts SO on the second, matching standard SPI controller implementations.

How does write protection work on the AT25080AY1-10YU-1.8?

Write protection on the AT25080AY1-10YU-1.8 combines hardware and software methods: the WP pin disables status register and protected memory writes when WPEN = 1 and WP = low; the status register's BP0/BP1 bits define 0%, 25%, 50%, or 100% array protection. The AT25080AY1-10YU-1.8 requires WREN before modifying protection bits via WRSR.

What is the purpose of the HOLD pin on the AT25080AY1-10YU-1.8?

The HOLD pin on the AT25080AY1-10YU-1.8 allows a master controller to temporarily suspend an active SPI transaction-such as a multi-byte read-without resetting the internal address counter or losing synchronization. To use it, HOLD must be asserted low while SCK is low; resuming requires bringing HOLD high while SCK remains low. The AT25080AY1-10YU-1.8 maintains all internal states during HOLD.

Is the AT25080AY1-10YU-1.8 recommended for new designs?

No-the official documentation explicitly labels AT25080AY1-10YU-1.8 as "Not recommended for new design." This reflects Microchip's product lifecycle guidance; newer alternatives like the AT25080B series offer enhanced reliability and extended support. For existing designs, the AT25080AY1-10YU-1.8 remains available through Aetrix Electronics with full traceability and continuity planning.