Microchip Technology 25LC080T/SN

Overview

25LC080T/SN from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 2.5–5.5 V supply range, and 2 MHz max clock frequency for industrial-temperature (−40°C to +85°C) applications. It features 16-byte page write, hardware write protection via WP pin, and HOLD functionality for interrupt-safe serial communication in embedded control systems.

For engineers reviewing the 25LC080T/SN datasheet, 25LC080T/SN pinout, 25LC080T/SN application, or 25LC080T/SN equivalent, key selection criteria include VCC operating range, SPI timing compliance at 2 MHz, page-write endurance (1 M cycles), and SOIC-8 (150 mil) package compatibility with space-constrained PCB layouts.

Technical Context

The 25LC080T/SN implements a standard SPI Mode 0,0 interface with separate SI (data-in) and SO (data-out) lines, requiring CS, SCK, SI, SO, WP, HOLD, VCC, and VSS. Its internal architecture includes a status register with WIP, WEL, BP0/BP1, and WPEN bits, enabling configurable block write protection (none/1/4/1/2/all array) and hardware-based write disable when WP is low and WPEN=1.

Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed internal write cycle (≤5 ms). During active write, memory reads are blocked but Status Register remains readable to monitor WIP bit; sequential read supports automatic address increment and wraparound from 03FFh to 0000h.

Key Specifications

Pinout & Package

25LC080T/SN is packaged in an 8-pin SOIC (150 mil body), JEDEC MS-012 compliant, with gull-wing leads and 1.27 mm pitch. The package is tape-and-reel formatted (T suffix) for automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080T/SN, 25AA080T/SN offers wider voltage tolerance but sacrifices 2× SPI speed, while 25LC080A-I/SN delivers identical performance with superior ESD immunity and official new-design endorsement - making it the preferred upgrade path.

Availability

25LC080T/SN is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body controllers, medical infusion pumps, and smart energy meters requiring stable component supply across extended production lifecycles.

Supply support for 25LC080T/SN 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25LC080T/SN belongs to Microchip's legacy SPI Serial EEPROM product line, designed specifically for reliable, low-power nonvolatile storage in resource-constrained embedded systems requiring simple 4-wire serial interface and industrial-grade temperature operation.

FAQ

What is the maximum clock frequency supported by the 25LC080T/SN?

The 25LC080T/SN supports a maximum SPI clock frequency of 2 MHz when VCC is between 2.5 V and 4.5 V. At VCC = 4.5–5.5 V, the device operates up to 3 MHz, but the 25LC080 variant is specified only to 2 MHz per its device selection table - this limit ensures timing margin across the full industrial temperature range and avoids setup/hold violations in real-world PCB layouts.

Does the 25LC080T/SN support page write, and what is the page size?

Yes, the 25LC080T/SN supports page write with a fixed page size of 16 bytes. Writes must remain within a single page boundary (addresses ending in 0000–1111 binary); crossing a page boundary during a multi-byte write causes the internal address pointer to roll over to the start of the same page, overwriting previously written data. This behavior requires firmware to validate address alignment before initiating page writes.

How does hardware write protection work on the 25LC080T/SN?

Hardware write protection on the 25LC080T/SN is controlled jointly by the WP pin and the WPEN bit in the Status register. When WPEN = 1 and WP = low, writes to nonvolatile bits in the Status register are disabled - protecting BP0/BP1 and WPEN settings. If WPEN = 0, the WP pin has no effect, allowing full Status register writes regardless of WP state. This dual-control scheme enables safe deployment in systems with grounded WP pins.

What is the purpose of the HOLD pin on the 25LC080T/SN?

The HOLD pin on the 25LC080T/SN suspends ongoing SPI communication without resetting the internal command state. When asserted (pulled low while SCK is low), SI, SCK, and SO enter high-impedance, allowing the host MCU to service higher-priority interrupts. Resuming requires bringing HOLD high while SCK remains low; improper timing may cause bus contention or lost synchronization. This feature is essential for deterministic real-time systems.

Is the 25LC080T/SN pin-compatible with other members of the 25XX080 family?

Yes, the 25LC080T/SN is fully pin-compatible with 25AA080T/SN and 25C080T/SN in the same SOIC-8 package. All share identical pin functions (CS, SO, WP, VSS, SI, SCK, HOLD, VCC), identical pinout order, and compatible AC/DC electrical characteristics - enabling direct substitution where voltage and speed requirements align, though firmware must verify timing margins and protection bit behavior per variant.