Microchip Technology 25LC080DT-E/SN

Overview

25LC080DT-E/SN from Microchip Technology is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page size, and automotive-grade temperature support (−40°C to +125°C). It operates from 2.5V to 5.5V, supports up to 10 MHz clock frequency, and features hardware write protection via WP pin and STATUS register control - used for firmware storage, calibration data retention, and configuration backup in engine control units.

For engineers reviewing the 25LC080DT-E/SN datasheet, 25LC080DT-E/SN pinout, 25LC080DT-E/SN application, or 25LC080DT-E/SN equivalent, key selection criteria include automotive temperature rating, 32-byte page write capability, HOLD pin support for interrupt-safe SPI pausing, and block-level write protection (1/4, 1/2, or full array).

Technical Context

The 25LC080DT-E/SN 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 signals. Its internal architecture includes a 16-bit address pointer, page latches, and HV generator for EEPROM programming.

Write operations require explicit WREN instruction followed by WRITE command and auto-incremented sequential reads are supported. The device uses self-timed internal write cycles (≤5 ms), and STATUS register bits (WIP, WEL, BP0/BP1) provide real-time control and protection state visibility during active communication.

Key Specifications

Pinout & Package

25LC080DT-E/SN is housed in an 8-lead SOIC package (SN suffix), 3.9 mm × 4.9 mm body, with standard 1.27 mm pitch. Pin 1 is marked with a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/SN, the 25LC080DT-E/SN adds automotive qualification and extended high-temp operation without layout or firmware changes; versus AT25DF041A-SHN-T, it retains legacy SPI simplicity and drop-in compatibility but offers lower density and no quad mode.

Availability

25LC080DT-E/SN is available at Aetrix Electronics and suitable for engine control units, ADAS modules, infotainment head units, and EV battery management systems requiring stable component supply across extended automotive lifecycles.

Supply support for 25LC080DT-E/SN 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 development tools.

The 25LC080DT-E/SN belongs to Microchip's 25XX080C/D family of SPI EEPROMs, designed specifically for robust, low-power nonvolatile storage in harsh environments where data integrity and long-term reliability are mission-critical.

FAQ

What is the maximum clock frequency supported by the 25LC080DT-E/SN?

The 25LC080DT-E/SN supports up to 10 MHz SPI clock frequency when VCC is 4.5V to 5.5V. At 2.5V ≤ VCC < 4.5V, the maximum clock is 5 MHz. These limits ensure reliable setup/hold timing across automotive temperature extremes and prevent read/write errors in noise-prone vehicle environments. The 25LC080DT-E/SN datasheet specifies AC characteristics including TCSS, TCSH, and Tsu to validate timing compliance.

Does the 25LC080DT-E/SN support page write operations, and what is its page size?

Yes, the 25LC080DT-E/SN 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 loaded before triggering an internal write cycle, improving throughput for contiguous configuration data. Page boundaries start at addresses divisible by 32 (e.g., 0x0000, 0x0020), and crossing boundaries wraps data to the start of the same page.

How does hardware write protection work on the 25LC080DT-E/SN?

Hardware write protection on the 25LC080DT-E/SN requires both the WP pin (Pin 3) to be low AND the WPEN bit (STATUS register bit 7) set to '1'. When enabled, this combination blocks writes to nonvolatile STATUS register bits (BP0, BP1, WPEN) but permits normal memory reads and writes. The 25LC080DT-E/SN remains fully functional for data access while preventing accidental corruption of protection settings.

What is the purpose of the HOLD pin on the 25LC080DT-E/SN?

The HOLD pin (Pin 7) on the 25LC080DT-E/SN suspends ongoing SPI communication without resetting the internal state - allowing the host MCU to service urgent interrupts and resume exactly where it left off. To activate, HOLD must be pulled low while SCK is low; resuming requires bringing HOLD high while SCK remains low. During HOLD, SI, SO, and SCK are tri-stated, preserving bus integrity.

Is the 25LC080DT-E/SN RoHS compliant and Pb-free?

Yes, the 25LC080DT-E/SN is Pb-free and RoHS compliant, as confirmed in the official Microchip datasheet DS22151B. The 'SN' package suffix denotes 8-lead SOIC with matte tin (Sn) lead finish, meeting JEDEC J-STD-609 Category 1 requirements. All packaging variants (PDIP, TSSOP, MSOP, TDFN) for the 25LC080DT-E/SN family are similarly compliant.