Microchip Technology 25AA080CT-I/MNY

Overview

25AA080CT-I/MNY from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1.8–5.5 V supply range, 16-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 firmware storage, calibration data retention, and configuration memory in microcontroller-based embedded systems.

For engineers reviewing the 25AA080CT-I/MNY datasheet, 25AA080CT-I/MNY pinout, 25AA080CT-I/MNY application, or 25AA080CT-I/MNY equivalent, key selection criteria include VCC min (1.8 V), page write limit (16 bytes), HOLD/CS timing margins at low voltage, and WPEN-controlled hardware write protection behavior.

Technical Context

The 25AA080CT-I/MNY implements a standard SPI Mode 0,0 interface with separate SI/SO lines and active-low CS. Its internal architecture includes a 1024 × 8-bit EEPROM array, page latches, HV generator for programming, and status register with WIP, WEL, BP0/BP1, and WPEN bits.

Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate internal 5 ms erase/write cycle; reads support sequential addressing with automatic address rollover. HOLD pin suspends ongoing transfers while preserving internal state, enabling interrupt servicing without reinitialization.

Key Specifications

Pinout & Package

25AA080CT-I/MNY is housed in an 8-lead 2×3 mm TDFN package (MN suffix), RoHS-compliant and Pb-free, with wettable flank leads for automated optical inspection. Pin 1 is located at bottom-left corner when marking side faces up and notch oriented top-left.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080CT-I/MNY, the 25AA080T-I/ST offers identical electrical behavior in a more serviceable package, while the AT25080B-SSHL-T trades HOLD functionality for larger page writes - making 25AA080CT-I/MNY optimal for interrupt-sensitive, space-constrained embedded designs.

Availability

25AA080CT-I/MNY 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 product lifecycles.

Supply support for 25AA080CT-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 25AA080C/D family delivers cost-effective, low-voltage SPI EEPROMs optimized for embedded systems requiring reliable nonvolatile storage with minimal pin count and power budget - especially where space, interrupt latency, and long-term data integrity are critical.

FAQ

What is the minimum VCC required for reliable operation of the 25AA080CT-I/MNY?

The 25AA080CT-I/MNY operates reliably from 1.8 V to 5.5 V. At 1.8 V, maximum clock frequency is 3 MHz, and AC timing parameters such as TCSS and THD scale accordingly. All DC and AC specifications in the DS22151B datasheet are guaranteed across this full range, making 25AA080CT-I/MNY suitable for battery-powered or energy-harvesting systems where supply voltage may dip below 2.5 V.

Does the 25AA080CT-I/MNY support page write operations, and what is the maximum byte count per page?

Yes, the 25AA080CT-I/MNY supports page write operations with a fixed 16-byte page size ('C' version designation). Up to 16 bytes can be written in a single transaction, provided all addresses fall within the same physical page boundary (e.g., 0x000–0x00F, 0x010–0x01F). Attempting to cross a page boundary causes wraparound - a critical constraint requiring firmware validation before issuing WRITE commands.

How does the HOLD pin function during an active SPI transfer on the 25AA080CT-I/MNY?

The HOLD pin on the 25AA080CT-I/MNY suspends ongoing SPI communication while preserving internal state - including address pointer and command context. To activate HOLD, the pin must be pulled low while SCK is low; transitions on SI, SO, and SCK are ignored until HOLD is returned high (also with SCK low). This enables deterministic interrupt handling without retransmitting the entire sequence, a key advantage over EEPROMs lacking HOLD.

Can the 25AA080CT-I/MNY be write-protected using both hardware and software methods simultaneously?

Yes, the 25AA080CT-I/MNY supports dual-layer write protection: hardware via the WP pin (when WPEN = 1 and WP = low) blocks STATUS register writes, while software via BP0/BP1 bits in the STATUS register controls memory array protection. The WPEN bit itself is nonvolatile and writable only when WP = high or WPEN = 0 - allowing safe initial configuration even in systems with grounded WP pins.

What is the typical endurance and data retention specification for the 25AA080CT-I/MNY?

The 25AA080CT-I/MNY guarantees >1 million erase/write cycles and >200 years of data retention at +25°C. Endurance is characterized at 25°C and VCC = 5.5 V; retention degrades logarithmically with temperature - e.g., ~30 years at +85°C ambient. These values are verified per Microchip's Total Endurance™ Model and apply to the full 1024 × 8-bit array under specified operating conditions.