Microchip Technology 25LC080D-I/MS

Overview

25LC080D-I/MS from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page write capability, and industrial temperature range (−40°C to +85°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 - used for nonvolatile parameter storage in microcontroller-based embedded systems requiring reliable, low-power data retention.

For engineers reviewing the 25LC080D-I/MS datasheet, 25LC080D-I/MS pinout, 25LC080D-I/MS application, or 25LC080D-I/MS equivalent, key selection criteria include SPI interface timing compliance, page size alignment for firmware update buffers, hardware write protection via WP pin, HOLD functionality for interrupt-safe bus arbitration, and MSOP-8 packaging for space-constrained PCB layouts.

Technical Context

The 25LC080D-I/MS implements a standard SPI Mode 0,0 (CPOL=0, CPHA=0) interface with separate SI and SO lines, enabling full-duplex command/address/data flow under CS control. Its internal architecture includes a 32-byte page latch, status register with WIP/WEL/BP bits, and HV generator for EEPROM cell programming.

Write operations require explicit WREN instruction followed by CS high after final data bit; page writes are bounded strictly within 32-byte physical boundaries (000h–01Fh, 020h–03Fh, etc.), and crossing boundaries causes wraparound. HOLD suspends ongoing transfers while preserving internal state, allowing host MCU to service higher-priority interrupts without reinitializing the sequence.

Key Specifications

Pinout & Package

25LC080D-I/MS is housed in an 8-lead MSOP package (3.0 mm × 4.4 mm, 0.65 mm pitch), optimized for high-density PCB layouts while maintaining hand-solderability and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/SN, the 25LC080D-I/MS offers 40% smaller PCB area and improved thermal dissipation in compact enclosures; versus AT25080B-MAU-10, it provides native 32-byte page alignment and simpler status register interpretation, reducing firmware validation effort in industrial control systems.

Availability

25LC080D-I/MS is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration archives, smart energy meters, and automotive body control modules requiring stable component supply across extended product lifecycles.

Supply support for 25LC080D-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 25LCxx series targets cost-sensitive, high-reliability embedded systems needing robust nonvolatile storage - designed specifically for SPI-based microcontroller peripherals in industrial, medical, and automotive applications.

FAQ

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

The 25LC080D-I/MS supports up to 10 MHz clock frequency when VCC is 4.5V to 5.5V, 5 MHz at 2.5V ≤ VCC < 4.5V, and 3 MHz at 1.8V ≤ VCC < 2.5V. These limits are defined in Table 1-2 of the DS22151B datasheet and directly impact achievable SPI throughput in time-critical applications. The 25LC080D-I/MS must be operated within these AC specifications to guarantee reliable communication.

Does the 25LC080D-I/MS support hardware write protection?

Yes, the 25LC080D-I/MS supports hardware write protection using the WP pin in conjunction with the WPEN bit in its STATUS register. When WP is low and WPEN = 1, writes to nonvolatile STATUS register bits are disabled - protecting critical configuration such as block protection settings. This feature is fully documented in Section 2.6 and Table 2-4 of the DS22151B datasheet and applies directly to the 25LC080D-I/MS.

What is the page size of the 25LC080D-I/MS, and why does it matter?

The 25LC080D-I/MS has a 32-byte page size, meaning up to 32 bytes can be written in a single page write operation. This is double the 16-byte page size of the 'C' version (e.g., 25LC080C). Larger pages reduce total write cycles needed for bulk updates, improving endurance and lowering firmware overhead - especially valuable in applications like firmware patching or logging where data naturally aligns to 32-byte boundaries.

Can the 25LC080D-I/MS be used in automotive applications?

The 25LC080D-I/MS is rated for Industrial temperature range (−40°C to +85°C), not Automotive (−40°C to +125°C). For automotive use, Microchip specifies the 25LC080D-E/MS variant, which undergoes additional qualification testing per AEC-Q100. Using the 25LC080D-I/MS in under-hood environments may risk parametric drift or premature failure outside its validated operating envelope.

How does the HOLD pin function on the 25LC080D-I/MS?

The HOLD pin on the 25LC080D-I/MS pauses ongoing SPI transactions without resetting internal state - allowing the host MCU to service higher-priority interrupts and resume exactly where it left off. HOLD must be asserted while SCK is low; otherwise, it takes effect at the next SCK high-to-low transition. This behavior is explicitly defined in Section 3.6 and Figure 1-1 of the DS22151B datasheet and is fully implemented in the 25LC080D-I/MS silicon.