Microchip Technology 25LC080B-E/MS

Overview

25LC080B-E/MS from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page write capability, 10 MHz max clock frequency, and industrial-temperature operation (−40°C to +85°C). It serves as nonvolatile configuration storage in microcontroller-based systems requiring robust data retention and hardware write protection.

For engineers reviewing the 25LC080B-E/MS datasheet, 25LC080B-E/MS pinout, 25LC080B-E/MS application, or 25LC080B-E/MS 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 MSOP-8 package compatibility with space-constrained PCB layouts.

Technical Context

The 25LC080B-E/MS implements a standard SPI Mode 0,0 interface with separate SI and SO lines, CS-controlled device selection, and HOLD pin support for interrupt-safe bus suspension. Its internal architecture includes a write-enable latch, status register with WIP/WEL/BP bits, and hardware write-protection logic tied to WP pin and WPEN bit.

It supports byte and page writes within 32-byte physical pages, enforces automatic address rollover during sequential reads, and uses self-timed internal erase/write cycles completing in ≤5 ms. Block protection covers none, upper 1/4, upper 1/2, or full array via BP0/BP1 configuration.

Key Specifications

Pinout & Package

25LC080B-E/MS is housed in an 8-lead MSOP (Micro Small Outline Package) with 0.65 mm pitch, 3.00 mm × 4.90 mm body, and Pb-free/RoHS-compliant construction. The package supports automated SMT assembly and offers thermal and mechanical performance suitable for industrial environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080B-E/MS, the 25LC080B-I/MS offers identical functionality at lower cost for non-automotive applications, while the AT25080B-MAHL-T requires firmware adaptation due to divergent command protocol and missing HOLD support.

Availability

25LC080B-E/MS is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration storage, smart energy meters, and automotive body control modules requiring stable component supply and long-term lifecycle support.

Supply support for 25LC080B-E/MS 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 25LC080B-E/MS 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 across industrial, medical, and automotive markets.

FAQ

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

The 25LC080B-E/MS 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. These limits ensure setup/hold timing compliance per AC characteristics table in DS21808D.

Does the 25LC080B-E/MS require external pull-up resistors on its SPI lines?

The 25LC080B-E/MS does not require external pull-ups on SI, SO, or SCK - these pins are actively driven. However, CS and HOLD should be pulled high with 10 kΩ resistors to ensure defined states during power-up or MCU reset. WP may be pulled low externally to enable hardware write protection.

How does page write operation work in the 25LC080B-E/MS?

In the 25LC080B-E/MS, a page write transfers up to 32 bytes starting from any address aligned to a 32-byte boundary (e.g., 0x0000, 0x0020). If data crosses a page boundary, it wraps to the start of the same page. Software must validate address alignment before initiating page write to avoid unintended overwrites.

What is the function of the HOLD pin on the 25LC080B-E/MS?

The HOLD pin on the 25LC080B-E/MS suspends an ongoing SPI transaction without resetting the internal state. When pulled low (while SCK is low), it tri-states SI, SO, and SCK inputs, allowing the host MCU to service urgent interrupts and resume communication seamlessly upon releasing HOLD.

Can the 25LC080B-E/MS be used in automotive under-hood applications?

Yes - the "E" suffix in 25LC080B-E/MS denotes Automotive qualification with extended temperature range (−40°C to +125°C) and AEC-Q100 stress testing. It is suitable for under-hood modules such as engine control units, battery management systems, and lighting controllers where high-temperature reliability is mandatory.