Microchip Technology 25C080-E/P

Overview

25C080-E/P from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with automotive-grade temperature range (−40°C to +125°C), 3 MHz max clock frequency, and 4.5–5.5 V supply. It features 1024 × 8-bit organization, 16-byte page write, hardware write protection via WP pin, and built-in power-on data protection. Used in engine control units, airbag modules, and automotive infotainment for nonvolatile parameter storage.

For engineers reviewing the 25C080-E/P datasheet, 25C080-E/P pinout, 25C080-E/P application, or 25C080-E/P equivalent, this page delivers verified electrical specs, SPI timing constraints, HOLD/CS/WP functional behavior, endurance (1 M cycles), and automotive qualification details - all confirmed for the exact 25C080-E/P variant with PDIP-8 package and E-temp grade.

Technical Context

The 25C080-E/P implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, requiring CS assertion, SCK synchronization, and optional HOLD suspension. Its internal architecture includes a status register with WIP, WEL, BP0/BP1, and WPEN bits controlling block-level write protection and hardware lockout.

It supports sequential read across the full 0000h–03FFh address space with automatic rollover, byte/page write with CS-high termination, and self-timed 5 ms internal write cycles. Write enable latch (WEL) must be set via WREN instruction before any WRITE or WRSR operation, and resets automatically after successful execution.

Key Specifications

Pinout & Package

25C080-E/P is supplied in an 8-pin Plastic Dual In-line Package (PDIP) with 300 mil body width, JEDEC MS-001 compliant, suitable for through-hole prototyping and legacy automotive PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25AA080T-I/SN and 25LC080T-I/SN, the 25C080-E/P uniquely delivers 3 MHz SPI performance, 125°C operation, and 5 V-only compatibility - making it the only choice for high-speed, high-temperature automotive subsystems where voltage stability is assured.

Availability

25C080-E/P is available at Aetrix Electronics and suitable for engine control units, ADAS sensors, and instrument cluster displays requiring stable component supply across long automotive production lifecycles.

Supply support for 25C080-E/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 microcontroller, analog, and Flash-IP solutions, serving automotive, industrial, and consumer markets with vertically integrated silicon and software tools.

The 25C080-E/P belongs to Microchip's legacy 25XX080 SPI EEPROM product line, designed specifically for automotive applications demanding high-temperature reliability, deterministic write timing, and hardware-based data protection.

FAQ

What is the operating voltage range for the 25C080-E/P?

The 25C080-E/P operates strictly within 4.5 V to 5.5 V. It is not compatible with 3.3 V or lower supply rails. This fixed 5 V range ensures robust noise immunity and stable internal charge pump operation for EEPROM writes in automotive electrical environments with battery transients. Using outside this range may cause data corruption or permanent damage.

Does the 25C080-E/P support SPI Mode 1,1 or only Mode 0,0?

The 25C080-E/P supports SPI Mode 0,0 only (CPOL = 0, CPHA = 0): clock idles low, data sampled on rising edge, changed on falling edge. It does not support Mode 1,1 or other variants. This is confirmed by the "SERIAL INPUT TIMING" and "SERIAL OUTPUT TIMING" diagrams in DS21230E, which define setup/hold relative to SCK edges consistent with Mode 0,0.

How does the HOLD pin function during an active SPI read sequence?

During an active SPI read, pulling HOLD low (while SCK is low) suspends communication: SO enters high-impedance, SI/SCK inputs are ignored, and the internal address pointer freezes. The host MCU can service interrupts, then resume by driving HOLD high while SCK remains low - the 25C080-E/P continues reading from the exact byte where it paused, without retransmission.

What happens if CS is raised before the final data bit is clocked in during a page write?

If CS is brought high before the least significant bit (D0) of the nth data byte is clocked in during a page write, the write operation aborts and no data is committed to memory. The internal write cycle will not initiate. To complete a write, CS must remain low until D0 of the last byte is latched, then be raised to trigger the 5 ms self-timed internal write cycle - as specified in Figure 3-3 and Section 3.3.

Is the 25C080-E/P pin-compatible with the 25AA080 or 25LC080?

Yes - the 25C080-E/P shares identical 8-pin PDIP pinout, SPI command set, and register map with 25AA080 and 25LC080. However, voltage range, max clock speed, and temperature grade differ: 25C080-E/P requires 4.5–5.5 V and supports 3 MHz at 125°C, whereas 25AA080 supports 1.8–5.5 V at 1 MHz and 25LC080 supports 2.5–5.5 V at 2 MHz, both limited to 85°C.