Microchip Technology 25LC080DT-I/MS

Overview

25LC080DT-I/MS from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page size, 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 configuration storage in microcontroller-based embedded systems.

For engineers reviewing the 25LC080DT-I/MS datasheet, 25LC080DT-I/MS pinout, 25LC080DT-I/MS application, or 25LC080DT-I/MS equivalent, key selection criteria include SPI interface compatibility, write-protection flexibility (BP0/BP1 bits), HOLD functionality for interrupt-safe bus sharing, and MSOP-8 packaging for space-constrained PCB layouts.

Technical Context

The 25LC080DT-I/MS implements a standard SPI Mode 0,0/Master-Slave interface with separate SI (data in) and SO (data out) lines, requiring only CS, SCK, SI, SO, WP, HOLD, VCC, and VSS. Its internal architecture includes a write-enable latch, STATUS register with WIP/WEL/BP0/BP1 bits, and hardware block protection controlled by WP pin and WPEN bit.

It supports byte and page write operations (up to 32 bytes per page), self-timed internal write cycles (≤5 ms), and sequential read with automatic address incrementing. The HOLD pin suspends ongoing SPI transfers without resetting state, enabling host MCU to service higher-priority interrupts while preserving transaction context.

Key Specifications

Pinout & Package

25LC080DT-I/MS is housed in an 8-lead MSOP package (3.0 mm × 3.0 mm, 0.65 mm pitch), optimized for high-density PCB layouts and reflow-compatible assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/SN and AT25080B-MAHL-T, the 25LC080DT-I/MS uniquely balances ultra-compact MSOP packaging, deterministic 32-byte page writes, and robust hardware write protection - making it optimal for space-limited, safety-aware embedded systems requiring predictable update behavior.

Availability

25LC080DT-I/MS is available at Aetrix Electronics and suitable for industrial sensor nodes, medical device calibration storage, automotive body control modules, and smart energy metering applications requiring stable component supply across extended product lifecycles.

Supply support for 25LC080DT-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 devices, and memory solutions, serving industrial, automotive, and consumer markets with high-reliability semiconductor products.

The 25LC080DT-I/MS belongs to Microchip's 25XX080C/D family of SPI Serial EEPROMs, designed specifically for cost-sensitive, space-constrained embedded systems needing robust nonvolatile storage with flexible protection and industry-standard serial interface compatibility.

FAQ

What is the maximum clock frequency supported by the 25LC080DT-I/MS?

The 25LC080DT-I/MS supports up to 10 MHz clock frequency when VCC is 4.5V to 5.5V, 5 MHz at 2.5V to <4.5V, and 3 MHz at 1.8V to <2.5V. Since the 25LC080DT-I/MS operates within 2.5V–5.5V, its practical maximum is 10 MHz. This enables fast configuration reads during system initialization without requiring additional wait states in the host MCU firmware.

Does the 25LC080DT-I/MS require external pull-up resistors on its SPI lines?

No, the 25LC080DT-I/MS does not require external pull-ups on SI, SO, or SCK - these pins are driven actively by the host MCU and the device. However, CS, WP, and HOLD should be pulled up externally (typically 4.7 kΩ to VCC) to ensure defined logic states during power-up and idle periods, preventing spurious writes or unintended hold activation in the 25LC080DT-I/MS.

How does the HOLD function work in the 25LC080DT-I/MS during an active SPI transaction?

The HOLD function in the 25LC080DT-I/MS pauses an ongoing SPI sequence when HOLD is pulled low while SCK is low. All I/O pins enter high-impedance, and internal state (address pointer, instruction phase) is preserved. To resume, HOLD must be raised while SCK remains low - then normal communication continues from the exact point of suspension. This avoids retransmission overhead in time-critical 25LC080DT-I/MS applications.

Can the 25LC080DT-I/MS be used in automotive applications requiring AEC-Q200 qualification?

No - the 25LC080DT-I/MS carries the "I" (Industrial) temperature grade (–40°C to +85°C) and is not AEC-Q200 qualified. For automotive use, Microchip offers the 25LC080D-E/MS variant (E grade, –40°C to +125°C), which undergoes additional stress testing. The 25LC080DT-I/MS is intended for industrial, medical, and commercial systems where extended temperature operation is not mandated by automotive standards.

What happens if a page write crosses a 32-byte boundary in the 25LC080DT-I/MS?

If a page write command attempts to cross a 32-byte boundary in the 25LC080DT-I/MS, data wraps around to the start of the same page instead of advancing to the next page - overwriting previously written bytes in that page. This behavior is inherent to the device's internal page latch architecture. Application firmware must validate address alignment and split writes across boundaries to prevent unintended data corruption in the 25LC080DT-I/MS.