Microchip Technology 25AA080/P

Overview

25AA080/P from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM IC designed for nonvolatile data storage in microcontroller-based systems. It features 1024 × 8-bit organization, 1.8–5.5 V supply range, 1 MHz max clock frequency, and industrial temperature operation (−40°C to +85°C). Used in embedded configuration memory, calibration storage, and firmware parameter retention.

For engineers reviewing the 25AA080/P datasheet, 25AA080/P pinout, 25AA080/P application, or 25AA080/P equivalent, this page delivers verified electrical specs, SPI interface timing constraints, page-write behavior, hardware write-protection logic, and real-world use context for reliable integration into low-power, space-constrained designs.

Technical Context

The 25AA080/P implements a standard SPI Mode 0 (CPOL=0, CPHA=0) serial interface with separate SI (data in) and SO (data out) lines, CS-controlled selection, and HOLD pin for transaction suspension. Its internal architecture includes a status register with WIP, WEL, BP0/BP1, and WPEN bits governing write enable state and block protection granularity.

It supports byte and 16-byte page writes, self-timed internal erase/write cycles (≤5 ms), and hardware write protection via WP pin combined with WPEN bit. Power-on defaults include standby mode, reset write enable latch, and high-impedance SO output - ensuring safe initialization without spurious writes.

Key Specifications

Pinout & Package

25AA080/P is supplied in an 8-pin Plastic Dual In-line Package (PDIP) with 300 mil body width, suitable for through-hole prototyping and legacy PCB assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080/P, 25AA080T-I/SN offers SMT compatibility but requires PCB redesign, while 25LC080/P provides faster timing and broader voltage tolerance at the expense of 1.8 V support - making each suitable for distinct layout and system-level trade-offs.

Availability

25AA080/P is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control modules, and consumer appliance preference storage requiring stable component supply over extended production lifecycles.

Supply support for 25AA080/P 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 microcontroller, mixed-signal, analog, and Flash-IP solutions, headquartered in Chandler, Arizona, serving industrial, automotive, and consumer markets globally.

The 25AA080/P belongs to Microchip's legacy SPI Serial EEPROM product line, engineered for robust, low-power nonvolatile storage in resource-constrained embedded systems with strict reliability and longevity requirements.

FAQ

What is the maximum clock frequency supported by the 25AA080/P?

The 25AA080/P supports up to 1 MHz maximum clock frequency when VCC is 4.5–5.5 V. At lower supply voltages (1.8–2.5 V), the maximum clock drops to 1 MHz per datasheet AC characteristics - this defines the upper limit for SPI transfer speed in host firmware implementations using the 25AA080/P.

Does the 25AA080/P support page writes, and what is the page size?

Yes, the 25AA080/P supports 16-byte page writes. Each page spans addresses ending in 0000–1111 (e.g., 0x0000–0x000F), and attempting to cross a page boundary during a single write sequence causes wraparound within that page - requiring firmware to enforce address alignment before initiating multi-byte writes to the 25AA080/P.

How does hardware write protection work on the 25AA080/P?

Hardware write protection on the 25AA080/P requires both the WP pin held low and the WPEN bit set high in the Status register. When enabled, it blocks writes to nonvolatile Status register bits (BP0, BP1, WPEN) but allows normal memory writes. If WPEN = 0, the WP pin has no effect - giving firmware full control over protection configuration regardless of physical pin state on the 25AA080/P.

What is the endurance and data retention specification for the 25AA080/P?

The 25AA080/P guarantees 1 million erase/write cycles and greater than 200 years of data retention at +25°C. These specifications are characterized and ensured per Microchip's reliability testing protocols - meaning the 25AA080/P maintains stored data integrity across decades in typical indoor environments without refresh or rewrite.

Can the 25AA080/P be used with a 1.8 V microcontroller?

Yes, the 25AA080/P is explicitly rated for 1.8–5.5 V operation and supports SPI communication down to 1.8 V supply, including valid logic thresholds (VIH2 = 0.7×VCC, VIL2 = 0.3×VCC) and functional timing at reduced clock rates - enabling direct interface with 1.8 V MCUs without level translation circuitry when using the 25AA080/P.