Microchip Technology 25AA080AT-I/MS

Overview

25AA080AT-I/MS from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 16-byte page size, and 1.8–5.5 V supply range. It features hardware write protection via WP pin, HOLD suspend functionality, and operates across -40°C to +85°C industrial temperature range in an 8-lead MSOP package. Used for nonvolatile parameter storage in microcontroller-based embedded systems requiring low-power, reliable data retention.

For engineers reviewing the 25AA080AT-I/MS datasheet, 25AA080AT-I/MS pinout, 25AA080AT-I/MS application, or 25AA080AT-I/MS equivalent, this page delivers verified electrical specs (e.g., 10 MHz max clock, 5 ms write cycle), real-world timing constraints (TCSH up to 250 ns at 1.8 V), packaging details (MSOP, 3.0 × 4.9 mm), and functional alternatives aligned to SPI EEPROM selection criteria.

Technical Context

The 25AA080AT-I/MS implements a standard SPI Mode 0,0/Master-Slave interface with separate SI/SO lines, CS-controlled selection, and HOLD-driven transaction suspension. Its internal architecture includes a write-enable latch, status register (WIP/WEL/BP0/BP1), and page latches enabling 16-byte burst writes within fixed physical page boundaries.

It supports block write protection (none/1/4/1/2/all array), power-on reset of WEL, and self-timed erase/write cycles. Data integrity is enforced by built-in power-on/off protection, write-protect pin logic gated by WPEN bit, and ESD immunity exceeding 4 kV - all compliant with Pb-free and RoHS requirements.

Key Specifications

Pinout & Package

8-Lead MSOP (Micro Small Outline Package), 3.0 mm × 4.9 mm body, 0.65 mm pitch, RoHS-compliant matte tin finish. Pin 1 marked with notch or dot; lead finish meets JEDEC J-STD-020 reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080AT-I/MS, the 25LC080AT-I/MS offers identical functionality at higher minimum voltage, while AT25080B-MAHL-T adds automotive qualification and wider temperature tolerance at the cost of package compatibility - guiding selection based on voltage headroom and environmental certification needs.

Availability

25AA080AT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and smart energy meter firmware settings requiring stable component supply across long production lifecycles.

Supply support for 25AA080AT-I/MS 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 Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25AA080A/B series was designed specifically for cost-sensitive, low-power embedded systems requiring SPI-compatible nonvolatile storage with robust write protection and extended data retention - targeting industrial, medical, and consumer applications.

FAQ

What is the maximum clock frequency supported by the 25AA080AT-I/MS?

The 25AA080AT-I/MS supports up to 10 MHz SPI clock frequency when VCC is 4.5–5.5 V. At lower supply voltages, the maximum clock rate decreases: 5 MHz for 2.5–4.5 V and 3 MHz for 1.8–2.5 V. These limits are defined in Table 1-2 AC Characteristics and must be observed to ensure reliable data transfer and timing margin compliance in the 25AA080AT-I/MS.

Does the 25AA080AT-I/MS support page write operations, and what is the page size?

Yes, the 25AA080AT-I/MS supports page write operations with a fixed 16-byte page size - consistent across all 'A' versions including the 25AA080AT-I/MS. Page writes allow up to 16 sequential bytes to be loaded before triggering the internal 5 ms write cycle, improving efficiency over single-byte writes. Crossing page boundaries wraps data to the start of the current page.

How does hardware write protection work on the 25AA080AT-I/MS?

Hardware write protection on the 25AA080AT-I/MS requires both the WP pin (Pin 3) to be driven low AND the WPEN bit (Status Register Bit 7) to be set high. When active, this combination disables writes to the nonvolatile Status Register bits (BP0/BP1/WPEN), preventing accidental modification of block protection settings. Array writes remain unaffected unless BP bits are configured.

What is the operating temperature range for the 25AA080AT-I/MS?

The 25AA080AT-I/MS is rated for the Industrial temperature range of -40°C to +85°C, as indicated by the 'I' suffix in the part number. This specification is validated per Microchip's DS21808D datasheet and applies to all DC and AC electrical characteristics, ensuring reliable operation in demanding environments such as factory automation controllers and outdoor telemetry units using the 25AA080AT-I/MS.

Is the 25AA080AT-I/MS RoHS-compliant and Pb-free?

Yes, the 25AA080AT-I/MS is RoHS-compliant and Pb-free, with a matte tin (Sn) lead finish conforming to JEDEC standards. This is explicitly stated in the "Features" section and "Packaging Information" of the DS21808D datasheet, and the MSOP package marking includes the Pb-free JEDEC designator (3e). Compliance is verified through Microchip's material declarations and applicable test reports for the 25AA080AT-I/MS.