Microchip Technology 25LC080-I/P

Overview

25LC080-I/P from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 2 MHz max clock frequency at 2.5–5.5 V supply, and industrial temperature range (−40°C to +85°C). It features hardware write protection via WP pin, HOLD functionality for interrupt-safe serial pause, and 16-byte page write capability - used in embedded systems for firmware parameter storage, calibration data retention, and configuration backup.

For engineers reviewing the 25LC080-I/P datasheet, 25LC080-I/P pinout, 25LC080-I/P application, or 25LC080-I/P equivalent, key selection criteria include VCC operating range (2.5–5.5 V), SPI timing compliance (T_CSS/T_CSH ≤ 250 ns at 2.5–4.5 V), endurance (1 M cycles), and PDIP-8 package compatibility with legacy through-hole designs.

Technical Context

The 25LC080-I/P implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, requiring CS, SCK, and optional HOLD/WP control. Its internal architecture includes a status register with WIP, WEL, BP0/BP1, and WPEN bits enabling configurable block protection (none/1/2/all quadrants) and hardware write lock.

Write operations are self-timed (max 5 ms), support byte or 16-byte page writes within the same page boundary (0x000–0x00F per page), and require explicit WREN instruction before each write sequence. Power-on reset clears the write enable latch, and standby current is 1 µA at 2.5 V.

Key Specifications

Pinout & Package

8-pin PDIP (300 mil) package with through-hole mounting; 0.300" width, 0.373" length, 0.130" height; JEDEC MS-001 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080-I/P and 25LC080A-I/P, the 25LC080-I/P offers optimal balance of 2 MHz speed and 2.5 V minimum VCC for 3.3 V systems, while the A-version provides superior robustness for long-lifecycle deployments.

Availability

25LC080-I/P is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, automotive body control modules, and smart energy meters requiring stable component supply and legacy through-hole compatibility.

Supply support for 25LC080-I/P 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 devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25LC080-I/P belongs to Microchip's legacy SPI Serial EEPROM product line, designed specifically for reliable, low-power nonvolatile data storage in resource-constrained embedded systems with industrial temperature requirements.

FAQ

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

The 25LC080-I/P supports up to 2 MHz maximum clock frequency when operated within its specified VCC range of 2.5 V to 4.5 V. At VCC = 4.5–5.5 V, the limit rises to 3 MHz, but the 25LC080-I/P is rated for 2.5–5.5 V operation and industrial temperature only - thus 2 MHz is the guaranteed maximum for this specific part. This timing aligns with common 3.3 V MCU SPI peripherals without requiring clock dividers.

Does the 25LC080-I/P support page write operations, and what is the page size?

Yes, the 25LC080-I/P supports page write operations with a fixed page size of 16 bytes. Writes must remain within the same page boundary (e.g., addresses 0x000–0x00F, 0x010–0x01F); crossing page boundaries during a single write command causes wraparound and data corruption. This feature reduces write time versus byte-by-byte programming and is essential for efficient configuration updates in the 25LC080-I/P.

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

Hardware write protection on the 25LC080-I/P is controlled jointly by the WP pin and the WPEN bit in the Status register. When WPEN = 1 and WP = low, writes to nonvolatile Status register bits (BP0, BP1, WPEN) are blocked - memory array writes remain enabled unless BP bits are set. If WPEN = 0, the WP pin is ignored entirely. This dual-control scheme allows safe installation in systems with grounded WP pins while retaining full configurability via software.

What is the endurance and data retention specification for the 25LC080-I/P?

The 25LC080-I/P is specified for 1 million erase/write cycles and greater than 200 years of data retention at +85°C. These values are characterized (not 100% tested) per Microchip DS21230E, reflecting actual EEPROM cell physics under worst-case thermal stress. For applications requiring daily writes, this translates to over 2,700 years of theoretical operation - far exceeding typical industrial equipment lifespans and validating use in long-deployment scenarios like smart meters or medical devices.

Is the 25LC080-I/P pin-compatible with other members of the 25XX080 family?

Yes, the 25LC080-I/P is fully pin-compatible with the 25AA080-I/P and 25C080-I/P in the same PDIP-8 package, sharing identical pin functions, layout, and SPI instruction set. Differences lie solely in electrical specifications: VCC range (2.5–5.5 V), max clock (2 MHz), and temperature grade (industrial only). This allows direct substitution where voltage and speed requirements align - no PCB redesign is needed when migrating between these variants.