Microchip Technology 25LC080AT-E/SN

Overview

25LC080AT-E/SN from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 16-byte page write capability, 10 MHz max clock frequency, and industrial temperature range (−40°C to +85°C). It operates from 2.5–5.5 V and features hardware write protection via WP pin and status register control, enabling reliable nonvolatile data storage in microcontroller-based embedded systems.

For engineers reviewing the 25LC080AT-E/SN datasheet, 25LC080AT-E/SN pinout, 25LC080AT-E/SN application, or 25LC080AT-E/SN equivalent, key selection criteria include page size (16 B), VCC range (2.5–5.5 V), HOLD/CS timing margins, endurance (1M cycles), and SOIC-8 (SN) package compatibility with SPI bus-constrained PCB layouts.

Technical Context

The 25LC080AT-E/SN implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, requiring only CS, SCK, SI, SO, WP, HOLD, VCC, and VSS. Its internal architecture includes a write-enable latch, status register with WIP/WEL/BP bits, and page latches supporting atomic 16-byte writes within aligned physical pages.

Write operations require explicit WREN instruction before WRITE, followed by CS high to initiate self-timed 5 ms internal write cycle; read operations support sequential addressing with automatic address roll-over at 03FFh. HOLD pin suspends ongoing transfers without resetting state, enabling interrupt servicing on shared SPI buses.

Key Specifications

Pinout & Package

25LC080AT-E/SN is packaged in 8-lead SOIC (SN), 3.90 mm body width, RoHS-compliant, with standard JEDEC outline and 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080AT-E/SN, the 25AA080AT-I/SN offers lower voltage operation at the cost of automotive qualification, while the 25LC080BT-E/SN doubles page size for faster bulk writes but increases risk of intra-page wrap-around if boundary checks are omitted.

Availability

25LC080AT-E/SN is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical device design requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.

Supply support for 25LC080AT-E/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 components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.

The 25LC080A/B family delivers cost-effective, SPI-compatible EEPROMs optimized for embedded systems requiring robust nonvolatile storage with hardware write protection and industrial temperature operation.

FAQ

What is the maximum clock frequency supported by the 25LC080AT-E/SN?

The 25LC080AT-E/SN supports up to 10 MHz SPI clock frequency when VCC is 4.5–5.5 V. At 2.5–4.5 V, the maximum clock drops to 5 MHz, and at 1.8–2.5 V (not applicable to this 'LC' variant), it would be 3 MHz. These limits ensure reliable setup/hold timing for SI/SO signals and are specified in Table 1-2 of the DS21808D datasheet.

Does the 25LC080AT-E/SN support page write operations, and what is the page size?

Yes, the 25LC080AT-E/SN supports page write operations with a fixed 16-byte page size. Up to 16 bytes can be written in a single CS assertion, provided all addresses fall within the same physical page boundary (e.g., 0000h–000Fh). Crossing a page boundary causes wrap-around within the current page, not continuation to the next page.

How does hardware write protection work on the 25LC080AT-E/SN?

Hardware write protection on the 25LC080AT-E/SN requires both the WP pin (Pin 3) to be low AND the WPEN bit (Status Register bit 7) set to 1. When enabled, this blocks writes to the Status Register only; memory array writes remain permitted unless blocked by BP0/BP1 bits. If WPEN = 0, the WP pin has no effect.

What is the endurance and data retention specification for the 25LC080AT-E/SN?

The 25LC080AT-E/SN guarantees 1,000,000 erase/write cycles and data retention exceeding 200 years at +85°C ambient temperature. These values are characterized and ensured per Microchip's Total Endurance™ model and reflect actual device performance under specified operating conditions, not extrapolated estimates.

Is the 25LC080AT-E/SN compatible with standard SOIC-8 footprints, and what is its package type?

Yes, the 25LC080AT-E/SN uses the 8-lead Plastic Small Outline (SN) package - a narrow-body SOIC with 3.90 mm width, 1.27 mm lead pitch, and JEDEC MS-012AC outline. It is fully compatible with standard SOIC-8 land patterns and reflow soldering profiles for RoHS-compliant assembly.