Microchip Technology 25AA080DT-I/MNY

Overview

25AA080DT-I/MNY 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. It serves as nonvolatile configuration storage in microcontroller-based embedded systems requiring low-power, reliable data retention.

For engineers reviewing the 25AA080DT-I/MNY datasheet, 25AA080DT-I/MNY pinout, 25AA080DT-I/MNY application, or 25AA080DT-I/MNY equivalent, key selection criteria include VCC operating range compatibility, page-write boundary handling, HOLD timing constraints, and WPEN-enabled hardware write protection behavior in power-cycled systems.

Technical Context

The 25AA080DT-I/MNY implements a standard SPI Mode 0,0 interface with CS, SCK, SI, and SO signals, supporting up to 10 MHz clock at 4.5–5.5 V. Its internal architecture includes a 1024 × 8-bit EEPROM array, page latches, HV generator, and STATUS register with WIP, WEL, BP0/BP1, and WPEN bits.

Write operations require explicit WREN instruction followed by CS high after final data bit; page writes are limited to 32 bytes within a single physical page (000h–01Fh, 020h–03Fh, etc.). The HOLD pin suspends serial communication while preserving internal state, enabling interrupt servicing without sequence restart.

Key Specifications

Pinout & Package

25AA080DT-I/MNY is housed in an 8-lead 2×3 mm TDFN package (MN suffix), with wettable flank leads for automated optical inspection. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise layout starting from top-left corner when marking side faces up.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080DT-I/MNY, 25LC080DT-I/MNY excludes 1.8 V operation but offers identical timing and protection features, while AT25080B-MAHL-T provides voltage compatibility at the cost of STATUS register behavioral divergence requiring firmware validation.

Availability

25AA080DT-I/MNY is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, and smart energy metering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 25AA080DT-I/MNY 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 25AAxx0xx family delivers cost-optimized, low-voltage SPI EEPROMs targeting space-constrained embedded systems where reliability, low power, and industrial temperature operation are mandatory.

FAQ

What is the maximum clock frequency supported by the 25AA080DT-I/MNY across its full voltage range?

The 25AA080DT-I/MNY supports up to 10 MHz SPI clock frequency at VCC ≥ 4.5 V, 5 MHz at 2.5 V ≤ VCC < 4.5 V, and 3 MHz at 1.8 V ≤ VCC < 2.5 V. These limits are defined in Table 1-2 of the DS22151B datasheet and reflect guaranteed AC timing margins under industrial temperature conditions. Exceeding these frequencies may result in read/write failures or STATUS register misreads.

How does the HOLD pin function during an active write cycle in the 25AA080DT-I/MNY?

The HOLD pin has no effect on an ongoing internal write cycle in the 25AA080DT-I/MNY. Once CS rises after a valid write sequence, the device enters self-timed write mode (≤5 ms), during which HOLD assertions are ignored. HOLD only suspends active SPI communication - i.e., it must be asserted *before* CS deactivation to pause a read or write-in-progress sequence.

Can the 25AA080DT-I/MNY be used in a 1.8 V system without level shifting?

Yes, the 25AA080DT-I/MNY operates natively from 1.8 V to 5.5 V, with verified DC and AC characteristics across this full range. Its VIH1 threshold is 0.7×VCC, ensuring reliable recognition of 1.8 V logic-high signals from compatible MCUs. No level-shifting circuitry is required when interfacing with 1.8 V SPI masters.

What happens if a page write command crosses a 32-byte boundary in the 25AA080DT-I/MNY?

If a page write command attempts to cross a 32-byte boundary (e.g., writing 32 bytes starting at address 0x01F), the 25AA080DT-I/MNY wraps the excess data to the start of the same page (0x000), overwriting previously written bytes. This behavior is documented in Section 2.3 and requires application firmware to enforce page-aligned writes or split multi-page transfers manually.

Is the 25AA080DT-I/MNY pin-compatible with the 25AA080CT-I/MNY?

Yes, both 25AA080DT-I/MNY and 25AA080CT-I/MNY share identical TDFN-8 (MN) packaging, pinout, and electrical interface. The only difference is page size: 'D' version uses 32-byte pages, while 'C' version uses 16-byte pages. Firmware must be adapted to respect the larger page boundary, but PCB layout and schematic symbols remain unchanged.