Microchip Technology 25LC080B-E/SN

Overview

25LC080B-E/SN from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 32-byte page write capability, 10 MHz max clock frequency, and industrial-temperature operation (−40°C to +85°C). It features hardware write protection via WP pin and status register, self-timed erase/write cycles, and block protection for 0%, 25%, 50%, or 100% of memory - used in embedded system configuration storage, firmware parameter retention, and sensor calibration data logging.

For engineers reviewing the 25LC080B-E/SN datasheet, 25LC080B-E/SN pinout, 25LC080B-E/SN application, or 25LC080B-E/SN equivalent, key selection criteria include VCC range (2.5–5.5 V), page size (32 bytes), endurance (1,000,000 cycles), data retention (>200 years), and SOIC-8 (SN) package compatibility with SPI bus timing constraints.

Technical Context

The 25LC080B-E/SN implements a standard SPI Mode 0,0/Master-Slave interface with separate SI (input) and SO (output) lines, CS-controlled selection, and HOLD-enabled transaction suspension. Its internal architecture includes a 1024 × 8-bit EEPROM array, page latches, HV generator for write/erase, and a status register with WIP, WEL, BP0/BP1, and WPEN bits.

Write operations require explicit WREN instruction before WRITE or WRSR commands; CS high after final data bit initiates the 5 ms internal write cycle. Block protection is nonvolatile and configurable via WRSR, while hardware write protection engages only when WP = low and WPEN = 1 - enabling selective, robust memory lockdown without software intervention.

Key Specifications

Pinout & Package

25LC080B-E/SN is packaged in an 8-lead SOIC (SN) with 1.27 mm pitch, 3.90 mm body width, and Pb-free/RoHS-compliant construction. Pin 1 is marked by a beveled corner or notch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080B-I/SN, the 25LC080B-E/SN adds automotive-grade qualification and extended temperature validation; versus AT25080B-SSHL-T, it trades speed and voltage flexibility for HOLD support and Microchip's established ecosystem integration.

Availability

25LC080B-E/SN is available at Aetrix Electronics and suitable for industrial PLCs, medical calibration systems, automotive body control modules, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for 25LC080B-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 design and manufacturing operations.

The 25LC080B-E/SN belongs to Microchip's 25XX080A/B family of SPI Serial EEPROMs, designed specifically for reliable, low-power, nonvolatile data storage in resource-constrained embedded systems requiring industrial or automotive qualification.

FAQ

What is the maximum clock frequency supported by the 25LC080B-E/SN?

The 25LC080B-E/SN supports up to 10 MHz SPI clock frequency when VCC is 4.5 V to 5.5 V. At 2.5 V ≤ VCC < 4.5 V, the maximum clock drops to 5 MHz, and at 1.8 V ≤ VCC < 2.5 V, it is 3 MHz - though the 25LC080B-E/SN is not rated for 1.8 V operation. These limits ensure reliable setup/hold timing per AC specifications in DS21808D.

Does the 25LC080B-E/SN support page write operations, and what is the page size?

Yes, the 25LC080B-E/SN supports page write operations with a fixed 32-byte page size. This allows up to 32 sequential bytes to be loaded into the page buffer before initiating the internal 5 ms write cycle. Writing across a page boundary causes wraparound - data intended for the next page overwrites the start of the current page.

How does hardware write protection work on the 25LC080B-E/SN?

Hardware write protection on the 25LC080B-E/SN requires both the WP pin to be low AND the WPEN bit (Status Register bit 7) to be set to 1. When enabled, it prevents writes to nonvolatile status register bits - but allows normal reads, writes to unprotected memory pages, and status register reads. If WP is high or WPEN is 0, hardware protection is disabled.

What package type is used for the 25LC080B-E/SN, and what are its key mechanical dimensions?

The 25LC080B-E/SN uses an 8-lead SOIC package designated SN, with 1.27 mm lead pitch, 3.90 mm body width, and 4.90 mm body length. It conforms to JEDEC MS-012 standards, features Pb-free matte tin plating, and includes a beveled corner or notch for Pin 1 identification.

Can the 25LC080B-E/SN be used in automotive applications, and what qualification does it carry?

Yes, the 25LC080B-E/SN is qualified for automotive applications with the 'E' suffix indicating operation from −40°C to +125°C and compliance with AEC-Q100 stress testing requirements. It is intended for use in body control modules, infotainment systems, and other under-dash automotive subsystems where extended temperature resilience is mandatory.