Microchip Technology 25AA080A-I/P

Overview

25AA080A-I/P from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 1.8–5.5 V supply range, and 16-byte page write capability. It operates across the industrial temperature range (−40°C to +85°C) and supports up to 10 MHz clock frequency. This device serves as nonvolatile configuration storage in microcontroller-based systems requiring low-power, reliable data retention.

For engineers reviewing the 25AA080A-I/P datasheet, 25AA080A-I/P pinout, 25AA080A-I/P application, or 25AA080A-I/P equivalent, key selection criteria include its 1.8 V minimum VCC, hardware write protection via WP pin and Status Register, HOLD functionality for interrupt-safe SPI pauses, and 1,000,000 erase/write endurance.

Technical Context

The 25AA080A-I/P implements a standard SPI Mode 0,0/Master-Slave interface with separate SI (data-in) and SO (data-out) lines, CS-controlled selection, and SCK-synchronized transfers. Its internal architecture includes a write-enable latch, status register with WIP/WEL/BP bits, and page latches enabling atomic 16-byte writes within aligned memory pages.

Hardware-level data protection is enforced through three independent mechanisms: power-on reset of the write-enable latch, programmable block protection (BP0/BP1), and dual-mode write protection combining the WP pin state with the nonvolatile WPEN bit. All operations-including read, write, and status access-are fully compatible with PIC® and other SPI-capable microcontrollers without external logic.

Key Specifications

Pinout & Package

25AA080A-I/P is packaged in an 8-lead PDIP (Plastic Dual In-Line Package) with 0.300-inch body width, RoHS-compliant matte tin lead finish, and industry-standard pin layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080A-I/P, the 25LC080A-I/P offers identical functionality at higher minimum VCC, while the AT25080B-SSHL-T provides automotive qualification and SOIC packaging-but neither matches the 25AA080A-I/P's combination of 1.8 V operation, PDIP form factor, and industrial-grade reliability in one package.

Availability

25AA080A-I/P is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, automotive body control modules, and smart home gateway configurations requiring stable component supply across extended lifecycles.

Supply support for 25AA080A-I/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, analog, and Flash-IP solutions, specializing in embedded control and connectivity technologies for industrial, automotive, and consumer markets.

The 25AA080A-I/P belongs to Microchip's 25XX080A/B family of SPI Serial EEPROMs, designed specifically for robust, low-voltage, nonvolatile data storage in resource-constrained embedded systems.

FAQ

What is the minimum operating voltage for the 25AA080A-I/P?

The 25AA080A-I/P supports a minimum supply voltage of 1.8 V, enabling direct integration with modern ultra-low-power microcontrollers and battery-operated systems without level-shifting circuitry. This specification is confirmed in the Device Selection Table and DC Characteristics section of the DS21808D datasheet, where VCC min = 1.8 V applies across the full industrial temperature range.

Does the 25AA080A-I/P support hardware write protection?

Yes, the 25AA080A-I/P supports hardware write protection via the WP pin in conjunction with the WPEN bit in its Status Register. When WP is low and WPEN = 1, writes to the nonvolatile Status Register bits are disabled. This dual-control mechanism prevents accidental corruption of protection settings in deployed systems, as documented in Section 2.6 and Table 2-4 of the DS21808D datasheet.

How many bytes can be written in a single page operation for the 25AA080A-I/P?

The 25AA080A-I/P supports 16-byte page writes, meaning up to 16 contiguous bytes can be loaded into the page buffer and committed to memory in one internal write cycle. This is explicitly stated in the Features list and Device Selection Table, distinguishing it from the 'B' versions (e.g., 25AA080B) which use 32-byte pages.

What is the purpose of the HOLD pin on the 25AA080A-I/P?

The HOLD pin on the 25AA080A-I/P suspends ongoing SPI communication without resetting the transaction state, allowing the host microcontroller to service higher-priority interrupts and resume exactly where it left off. This behavior is defined in Section 3.6 and Figure 1-1 of the DS21808D datasheet, and requires HOLD to be asserted while SCK is low to ensure deterministic timing.

Is the 25AA080A-I/P RoHS compliant and Pb-free?

Yes, the 25AA080A-I/P is RoHS compliant and Pb-free, as confirmed in the Features list ("Pb-free and RoHS compliant") and Packaging Information section (DS21808D-page 14), which specifies matte tin (Sn) plating per JEDEC standards. The "I/P" suffix denotes Industrial temperature grade in PDIP packaging, both of which meet RoHS Directive 2011/65/EU requirements.