Microchip Technology 25LC080D-E/MS

Overview

25LC080D-E/MS from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page write capability, and industrial/automotive temperature support (–40°C to +125°C). It operates from 2.5V to 5.5V, supports up to 10 MHz clock frequency, and delivers 5 mA read/write current at 5.5V - ideal for firmware storage and configuration retention in automotive control modules.

For engineers reviewing the 25LC080D-E/MS datasheet, 25LC080D-E/MS pinout, 25LC080D-E/MS application, or 25LC080D-E/MS equivalent, key selection criteria include its 32-byte page size, hardware write protection via WP pin and STATUS register, HOLD functionality for interrupt-safe SPI pauses, and MSOP-8 packaging for space-constrained PCB layouts.

Technical Context

The 25LC080D-E/MS implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, requiring CS, SCK, SI, SO, WP, HOLD, VCC, and VSS. Its internal architecture includes a page latch buffer, HV generator for EEPROM programming, and status register with WIP, WEL, BP0/BP1, and WPEN bits.

Write operations require explicit WREN instruction followed by CS high after data transmission to trigger the self-timed 5 ms max internal write cycle. Block protection supports four configurations (none, upper 1/4, upper 1/2, or full array), configurable via WRSR and enforced when WP = low and WPEN = 1.

Key Specifications

Pinout & Package

25LC080D-E/MS is housed in an 8-lead MSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), RoHS-compliant and Pb-free, optimized for automated assembly and thermal performance in compact automotive modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-E/MS, the 25LC080D-I/MS offers identical electrical and functional behavior except for temperature grade, while the AT25080B-MAHL-T trades HOLD support and register compatibility for alternate supply chain availability - making 25LC080D-E/MS the optimal choice where automotive qualification and interrupt-safe SPI are mandatory.

Availability

25LC080D-E/MS is available at Aetrix Electronics and suitable for automotive control units, industrial PLCs, medical infusion pumps, and smart metering systems requiring stable component supply across extended product lifecycles.

Supply support for 25LC080D-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 design and manufacturing operations.

The 25LC080D-E/MS belongs to Microchip's 25XX080 family of SPI Serial EEPROMs, designed specifically for robust, low-power nonvolatile storage in automotive, industrial, and medical applications demanding high reliability and long data retention.

FAQ

What is the maximum clock frequency supported by the 25LC080D-E/MS?

The 25LC080D-E/MS supports up to 10 MHz clock frequency when VCC is 4.5V to 5.5V. At 2.5V ≤ VCC < 4.5V, the maximum clock drops to 5 MHz, and at 1.8V ≤ VCC < 2.5V it is 3 MHz. These limits are defined by AC timing parameters TCSS, TCSH, and THI/TLO in the datasheet. The 25LC080D-E/MS must operate within these voltage-dependent frequency boundaries to ensure reliable SPI communication.

Does the 25LC080D-E/MS support page write operations, and what is the page size?

Yes, the 25LC080D-E/MS supports page write operations with a fixed 32-byte page size - distinguishing it from the 'C' version (16-byte pages). This allows up to 32 bytes to be written in a single SPI transaction, provided all addresses fall within the same physical page boundary (e.g., 0x000–0x01F). Exceeding the boundary causes wraparound, so firmware must validate address alignment before initiating page writes. The 25LC080D-E/MS uses this capability to reduce SPI overhead in configuration updates.

How does hardware write protection work on the 25LC080D-E/MS?

Hardware write protection on the 25LC080D-E/MS requires both the WP pin (Pin 3) to be driven low AND the WPEN bit (bit 7 of STATUS register) to be set high. When both conditions are met, writes to the nonvolatile STATUS register bits (BP0, BP1, WPEN) are blocked - though memory array reads and writes remain functional. If WP is high or WPEN is low, hardware protection is disabled. This dual-condition scheme prevents accidental lockout during board bring-up. The 25LC080D-E/MS defaults to WPEN = 0 at power-on, allowing initial STATUS register configuration even with WP grounded.

What is the purpose of the HOLD pin on the 25LC080D-E/MS, and how is it used?

The HOLD pin (Pin 7) on the 25LC080D-E/MS suspends ongoing SPI communication without resetting the internal state - enabling the host MCU to service time-critical interrupts and resume exactly where it left off. To activate HOLD, the pin must be pulled low while SCK is low; releasing HOLD (pulling high) while SCK remains low resumes transmission. During HOLD, SI, SCK, and SO enter high-impedance, and all inputs except CS are ignored. This feature is essential for deterministic real-time systems using the 25LC080D-E/MS in safety-critical contexts.

Is the 25LC080D-E/MS qualified for automotive applications, and what does the 'E' suffix indicate?

Yes, the 'E' in 25LC080D-E/MS denotes Automotive Temperature Grade (–40°C to +125°C), and the device is qualified per AEC-Q100 requirements for stress testing and reliability. This makes the 25LC080D-E/MS suitable for under-hood, powertrain, and body control modules where extended temperature operation and long-term data integrity are mandatory. The 'E' grade also implies enhanced screening, traceability, and failure rate reporting - critical for automotive OEMs. The 25LC080D-E/MS is not merely rated for the temperature range; it is fully qualified to that standard.