Microchip Technology 25AA080D-I/P

Overview

25AA080D-I/P from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page write capability, 1.8–5.5 V supply range, and industrial temperature rating (−40°C to +85°C). It interfaces via standard SPI bus (CS, SCK, SI, SO), supports HOLD and hardware write-protection (WP), and targets firmware storage, configuration memory, and calibration data retention in embedded control systems.

For engineers reviewing the 25AA080D-I/P datasheet, 25AA080D-I/P pinout, 25AA080D-I/P application, or 25AA080D-I/P equivalent, key selection criteria include page size (32 B), V_CC min (1.8 V), standby current (1 µA at +85°C), HOLD timing (20 ns min setup at 1.8 V), and block protection granularity (1/4, 1/2, or full array).

Technical Context

The 25AA080D-I/P implements a synchronous serial interface compliant with SPI Mode 0,0 and Mode 1,1, using separate SI (data-in) and SO (data-out) lines with CS-controlled device selection. Its internal architecture includes a write-enable latch, STATUS register with WIP/WEL/BP bits, and HV generator for EEPROM cell programming.

It supports byte and page writes (up to 32 bytes within one physical page), self-timed internal write cycles (≤5 ms), and hardware-assisted write protection via WP pin and WPEN bit. The HOLD function suspends ongoing SPI transfers without resetting sequence state, enabling interrupt servicing in real-time microcontroller applications.

Key Specifications

Pinout & Package

25AA080D-I/P is packaged in 8-lead PDIP (Plastic Dual In-Line Package), 300 mil body width, through-hole mountable with 0.100" pitch. Pin 1 is marked by notch or dot; package is Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/P and AT25080B-SSHL-T, the 25AA080D-I/P uniquely supports true 1.8 V operation while maintaining full 10 MHz speed and identical Microchip ecosystem compatibility-critical for next-generation ultra-low-power embedded controllers.

Availability

25AA080D-I/P is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, and automotive body control modules requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for 25AA080D-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, FPGA, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25AA080D-I/P belongs to Microchip's serial EEPROM product line, designed specifically for reliable, low-voltage, SPI-based nonvolatile data storage in space- and power-constrained embedded systems.

FAQ

What is the minimum supply voltage required for reliable operation of the 25AA080D-I/P?

The 25AA080D-I/P operates reliably down to 1.8 V across its full industrial temperature range (−40°C to +85°C). At this voltage, AC timing parameters such as clock frequency (3 MHz max), setup/hold times, and output valid delay are guaranteed per DS22151B. This enables direct integration with 1.8 V logic families without level-shifting circuitry, reducing BOM cost and board area in ultra-low-power designs.

How does the HOLD function behave during an active write cycle in the 25AA080D-I/P?

The HOLD pin has no effect on an ongoing internal write cycle in the 25AA080D-I/P. Once CS rises after a valid write sequence, the 5 ms self-timed write begins and cannot be paused or interrupted by HOLD. However, HOLD remains fully functional before write initiation and during read or status register access, allowing safe suspension of any non-write SPI transaction without loss of state.

Can the 25AA080D-I/P be used as a direct replacement for the 25AA080C-I/P in an existing design?

Yes, the 25AA080D-I/P can replace the 25AA080C-I/P if the design accommodates the larger 32-byte page size. Both share identical pinout, voltage range, temperature grade, and SPI protocol-but the 'D' version doubles the page buffer. Software must ensure write addresses do not cross 32-byte boundaries (vs. 16-byte for 'C'), or risk data wraparound within the same page.

What protection mechanisms prevent unintended writes to the 25AA080D-I/P memory array?

The 25AA080D-I/P employs four layered protections: (1) Power-on reset clears the write-enable latch; (2) Explicit WREN instruction required before each write; (3) Automatic WEL reset after every successful write or WRDI; (4) Hardware write-protection via WP pin enabled only when WPEN bit is set. These ensure immunity to noise, brownouts, and firmware bugs that could corrupt stored data.

Is the 25AA080D-I/P RoHS compliant and lead-free?

Yes, the 25AA080D-I/P is Pb-free and RoHS compliant per Microchip's packaging specification. The PDIP package carries the JEDEC matte tin (Sn) plating designation, and all markings-including "I/P" suffix-indicate industrial-grade, lead-free construction meeting EU Directive 2011/65/EU requirements without exemptions.