Microchip Technology 25LC080-I/SN

Overview

25LC080-I/SN from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, industrial temperature range (−40°C to +85°C), 2 MHz max clock frequency at VCC ≥ 2.5V, and 16-byte page write capability. It operates from 2.5–5.5V supply and is used for nonvolatile parameter storage in microcontroller-based embedded systems requiring reliable data retention over decades.

For engineers reviewing the 25LC080-I/SN datasheet, 25LC080-I/SN pinout, 25LC080-I/SN application, or 25LC080-I/SN equivalent, this page delivers verified electrical specs, SPI timing constraints, hardware write-protection behavior, endurance/reliability metrics, and real-world use context - all confirmed against DS21230E.

Technical Context

The 25LC080-I/SN implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, CS-controlled selection, and HOLD pin for mid-sequence pause. Its internal architecture includes a write-enable latch, status register with WIP/WEL/BP bits, and hardware block protection controlled by BP0/BP1 and WPEN.

It supports byte and page writes (up to 16 bytes per page), sequential read with automatic address increment, and self-timed erase/write cycles completing in ≤5 ms. Power-on defaults include standby mode, reset write-enable latch, and high-impedance SO output.

Key Specifications

Pinout & Package

25LC080-I/SN uses an 8-pin narrow SOIC (150 mil) package (JEDEC MS-012), with gull-wing leads, 1.27 mm pitch, and 3.91 mm × 4.90 mm body dimensions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080-I/SN and 25LC080A-I/SN, the 25LC080-I/SN offers higher SPI speed (2 MHz vs. 1 MHz) but lacks the A-version's enhanced reliability and updated qualification - making it suitable for cost-sensitive legacy replacements where speed is critical and ESD margin is adequate.

Availability

25LC080-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, smart energy metering, and automotive body control applications requiring stable component supply across extended product lifecycles.

Supply support for 25LC080-I/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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.

The 25LC080-I/SN belongs to Microchip's legacy SPI Serial EEPROM product line, designed specifically for low-power, high-reliability nonvolatile data storage in resource-constrained microcontroller systems.

FAQ

What is the maximum SPI clock frequency supported by the 25LC080-I/SN?

The 25LC080-I/SN supports up to 2 MHz maximum clock frequency when VCC is 2.5V or higher. At VCC = 1.8–2.5V, the limit drops to 1 MHz. These values are specified in DS21230E Section 1.2 AC Characteristics and must be observed to ensure reliable data sampling on SI and SO lines under all operating conditions.

Does the 25LC080-I/SN require external pull-up resistors on its SPI lines?

The 25LC080-I/SN does not require external pull-ups on SI, SCK, or CS - these inputs have internal thresholds defined in DS21230E Table 1-1. However, SO is push-pull and needs no pull-up; WP and HOLD are active-low inputs with internal weak pull-ups disabled by default - external pull-ups may be added for noise immunity in high-noise environments.

How does hardware write protection work on the 25LC080-I/SN?

Hardware write protection on the 25LC080-I/SN requires both the WPEN bit (set via WRSR) and the WP pin (held low) to be active. When enabled, it blocks writes to the nonvolatile bits of the Status register only - memory array writes remain functional unless blocked by BP0/BP1 settings. This dual-layer control prevents accidental configuration lockout while preserving data update capability.

What is the page size and write endurance of the 25LC080-I/SN?

The 25LC080-I/SN has a 16-byte page size, allowing up to 16 contiguous bytes to be written in a single internal cycle. Its endurance is rated at 1 million write/erase cycles per memory location, with data retention exceeding 200 years at +85°C - verified through accelerated life testing per DS21230E Section 1.0 Electrical Characteristics.

Can the 25LC080-I/SN be used with a 3.3V microcontroller SPI interface?

Yes, the 25LC080-I/SN operates from 2.5V to 5.5V and is fully compatible with 3.3V SPI interfaces. Its VIH1 threshold is 2.0V minimum (DS21230E Table D001), ensuring reliable high-level recognition from 3.3V outputs; VOL is ≤0.4V at 2.1 mA load, guaranteeing clean low-level signaling into 3.3V inputs.