Microchip Technology 25AA080DT-I/MS

Overview

25AA080DT-I/MS from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1.8–5.5 V supply range, 32-byte page size, and industrial temperature rating (–40°C to +85°C). It features hardware write protection via WP pin, HOLD suspend functionality, and self-timed 5 ms max write cycles - used for nonvolatile parameter storage in microcontroller-based embedded systems requiring low-power, reliable data retention.

For engineers reviewing the 25AA080DT-I/MS datasheet, 25AA080DT-I/MS pinout, 25AA080DT-I/MS application, or 25AA080DT-I/MS equivalent, key selection criteria include SPI interface compatibility, 1.8 V minimum VCC operation, MSOP-8 package footprint, page-write boundary handling, and hardware/software write-protection configuration.

Technical Context

The 25AA080DT-I/MS implements a standard SPI Mode 0,0 or 1,1 interface with separate SI and SO lines, supporting up to 10 MHz clock at 4.5–5.5 V. It uses an internal address pointer that auto-increments during sequential reads and wraps from 03FFh to 0000h.

Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate internal erase/write; the STATUS register provides real-time WIP and WEL status, while BP0/BP1 bits enable configurable block protection of 0%, 25%, 50%, or 100% of the 1024 × 8-bit array.

Key Specifications

Pinout & Package

25AA080DT-I/MS is housed in an 8-lead MSOP (Mini Small Outline Package) with 0.65 mm pitch, 3.0 mm × 4.4 mm body, and exposed pad option not present - compatible with automated SMT assembly and space-constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080DT-I/MS, the 25AA080DT-I/MS enables 1.8 V operation and larger page writes, while AT25080B-MAHL-T offers higher clock rate but requires validation of write-protection behavior and timing margins in existing firmware.

Availability

25AA080DT-I/MS is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, and smart energy metering requiring stable component supply, long-term data integrity, and RoHS-compliant sourcing.

Supply support for 25AA080DT-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 25AA080DT-I/MS belongs to Microchip's 25XX080 family of SPI Serial EEPROMs, designed specifically for robust, low-power nonvolatile storage in resource-constrained embedded systems where voltage flexibility and data endurance are critical.

FAQ

What is the minimum supply voltage supported by the 25AA080DT-I/MS?

The 25AA080DT-I/MS supports a minimum supply voltage of 1.8 V across its full industrial temperature range (–40°C to +85°C), enabling direct integration into battery-powered or low-voltage microcontroller systems without level-shifting circuitry. This specification is validated per DC CHARACTERISTICS Table 1-1 in DS22151B, with read/write functionality fully guaranteed at 1.8 V.

How does the HOLD pin function during an active SPI transaction on the 25AA080DT-I/MS?

The HOLD pin on the 25AA080DT-I/MS suspends SPI communication mid-sequence when pulled low while SCK is low, placing SI, SO, and SCK in high-impedance state without resetting internal state. To resume, HOLD must be raised while SCK remains low; violating this timing risks undefined behavior. This feature allows the host MCU to service urgent interrupts without reinitializing the entire SPI frame.

Can the 25AA080DT-I/MS perform page writes across address boundaries?

No - the 25AA080DT-I/MS restricts page writes to addresses within a single 32-byte physical page (e.g., 0000h–001Fh, 0020h–003Fh). Attempting to write across a boundary causes data to wrap to the start of the current page, overwriting prior bytes. Application firmware must explicitly manage address alignment to avoid unintended corruption, as confirmed in Section 2.3 of DS22151B.

What write protection mechanisms are implemented in the 25AA080DT-I/MS?

25AA080DT-I/MS implements three layered protections: (1) Power-on reset of the write enable latch, (2) Software-controlled BP0/BP1 bits for 0%/25%/50%/100% array locking, and (3) Hardware WP pin activation only when WPEN=1. These operate independently - for example, WP low with WPEN=0 permits full write access, while WP high with WPEN=1 enables software-only protection.

Is the 25AA080DT-I/MS pin-compatible with other 8-lead MSOP SPI EEPROMs?

The 25AA080DT-I/MS uses standard 8-lead MSOP pinout (CS/SO/WP/VSS/SI/SCK/HOLD/VCC) matching JEDEC MO-187AC, making it mechanically and electrically compatible with other MSOP-8 SPI EEPROMs like AT25080B-MAHL-T or 25LC080DT-I/MS. However, differences in STATUS register mapping, timing parameters, and write-protection logic require firmware validation before substitution.