Microchip Technology 25LC080AT-I/MS

Overview

25LC080AT-I/MS from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 16-byte page size, and 2.5–5.5 V supply range. It features hardware write protection via WP pin, HOLD suspend functionality, and operates across -40°C to +85°C industrial temperature range in an 8-lead MSOP package. Used for firmware storage, calibration data retention, and configuration parameter backup in microcontroller-based embedded systems.

For engineers reviewing the 25LC080AT-I/MS datasheet, 25LC080AT-I/MS pinout, 25LC080AT-I/MS application, or 25LC080AT-I/MS equivalent, this page delivers verified electrical specs (max 10 MHz clock, 5 ms write cycle), package mapping (MSOP-8), pin-level functional roles, real-world use scenarios, and two validated alternative parts with documented technical and application differences.

Technical Context

The 25LC080AT-I/MS implements a standard SPI Mode 0,0 or Mode 1,1 interface with separate SI (data-in) and SO (data-out) lines, requiring CS, SCK, and optional HOLD/WP control. Its internal architecture includes a write-enable latch, status register with WIP/WEL/BP bits, and page latches enabling 16-byte burst writes within aligned physical pages.

It supports sequential read with automatic address increment, self-timed erase/write cycles, and block protection covering none, 1/4, 1/2, or all of the 0000h–03FFh memory array. Power-on defaults include standby mode, reset write-enable latch, and high-impedance SO output.

Key Specifications

Pinout & Package

8-Lead MSOP (Micro Small Outline Package), 3.00 mm × 4.90 mm body, 0.65 mm pitch, Pb-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080AT-I/MS, the 25AA080AT-I/MS extends supply flexibility down to 1.8 V while maintaining identical footprint and interface behavior, whereas the 25LC080AT-E/MS retains all specifications but adds automotive-grade temperature qualification and lifecycle traceability.

Availability

25LC080AT-I/MS is available at Aetrix Electronics and suitable for industrial control systems, medical device calibration, and smart energy metering requiring stable component supply, long-term obsolescence management, and RoHS-compliant sourcing.

Supply support for 25LC080AT-I/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 design and manufacturing operations.

The 25LC080A/B family is designed for reliable, low-power nonvolatile data storage in resource-constrained embedded systems where SPI interface simplicity, write protection, and industrial temperature operation are critical.

FAQ

What is the maximum SPI clock frequency supported by the 25LC080AT-I/MS?

The 25LC080AT-I/MS supports up to 10 MHz SPI clock frequency when VCC is 4.5–5.5 V. At 2.5–4.5 V, max 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 setup/hold timing compliance per DS21808D AC characteristics Table 1-2.

Does the 25LC080AT-I/MS require external pull-up resistors on its SPI lines?

The 25LC080AT-I/MS does not require external pull-ups on SI, SCK, or CS - these inputs have CMOS-compatible thresholds and are actively driven by the host. However, SO is open-drain capable only when configured via STATUS register (not default), so standard push-pull SO operation uses host-side pull-up only if shared bus contention exists; typical designs rely on tri-state control via CS.

How does page write operation work in the 25LC080AT-I/MS?

The 25LC080AT-I/MS has a 16-byte page buffer. A page write sends up to 16 bytes starting at an address aligned to a 16-byte boundary (e.g., 0000h, 0010h). If the write crosses the boundary (e.g., start at 000Fh), data wraps to the page start instead of advancing - causing unintended overwrite. Software must enforce alignment or split writes across boundaries.

Can the 25LC080AT-I/MS be used with a 1.8 V microcontroller?

No - the 25LC080AT-I/MS requires minimum VCC of 2.5 V and is not specified for 1.8 V operation. For 1.8 V systems, use the pin-compatible 25AA080AT-I/MS, which shares the same MSOP-8 package, 16-byte page, and industrial temperature rating but supports 1.8–5.5 V supply.

What happens to the 25LC080AT-I/MS during power-up or brownout conditions?

At power-up, the 25LC080AT-I/MS enters standby mode with SO in high-impedance, write-enable latch reset, and internal logic initialized. Built-in power-on/off data protection circuitry prevents spurious writes during voltage ramp-up or drop. The WP pin and status register BP bits remain latched, preserving protection state across cycling.