Microchip Technology 25LC080D-I/SN

Overview

25LC080D-I/SN 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 parameter storage in embedded controllers, power supplies, and sensor calibration modules.

For engineers reviewing the 25LC080D-I/SN datasheet, 25LC080D-I/SN pinout, 25LC080D-I/SN application, or 25LC080D-I/SN equivalent, key selection criteria include SPI timing compliance at 10 MHz, 32-byte page write capability, hardware write protection via WP pin, and industrial-grade reliability with >1M endurance cycles and >200-year data retention.

Technical Context

The 25LC080D-I/SN implements a standard SPI Mode 0,0 interface with separate SI (data in) and SO (data out) lines, requiring CS, SCK, HOLD, and WP control signals. Its internal architecture includes a write-enable latch, STATUS register with WIP/WEL/BP bits, and page latches enabling atomic 32-byte writes within aligned boundaries.

It features dual-level write protection: software-controlled block protection (BP0/BP1) for 0%, 25%, 50%, or 100% array coverage, and hardware-enforced protection activated when WP is low and WPEN bit is set. All operations - including RDSR during write cycles - are supported without bus contention due to tri-state SO and HOLD-suspend capability.

Key Specifications

Pinout & Package

25LC080D-I/SN is packaged in an 8-lead SOIC (SN) with 150-mil width, RoHS-compliant matte tin finish, and standard JEDEC MS-012AC footprint (3.9 mm × 4.9 mm × 1.75 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/SN, the 25AA080D-I/SN offers broader supply compatibility but identical functionality at 2.5V+, while the AT25080B demands driver modifications and sacrifices configurable hardware write protection - making 25LC080D-I/SN optimal for stable 3.3V/5V industrial designs requiring robust, drop-in EEPROM support.

Availability

25LC080D-I/SN is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and automotive subsystems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for 25LC080D-I/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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25LC080D-I/SN belongs to Microchip's 25XX080C/D family of SPI EEPROMs, engineered for reliable nonvolatile storage in resource-constrained embedded systems where deterministic timing, low power, and industrial-grade durability are essential.

FAQ

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

The 25LC080D-I/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 drops to 5 MHz, and at 1.8V ≤ VCC < 2.5V (not applicable to this part), it would be 3 MHz. These limits ensure setup/hold timing margins are met across voltage and temperature ranges. The 25LC080D-I/SN datasheet specifies AC characteristics including TCSS, TCSH, and Tsu to validate timing compliance at each voltage tier.

Does the 25LC080D-I/SN require external pull-up resistors on its SPI lines?

The 25LC080D-I/SN does not require external pull-ups on SI, SCK, or CS - these inputs have CMOS-compatible thresholds and are actively driven by the host MCU. However, SO is open-drain–like during CS high or HOLD active, so a 4.7 kΩ pull-up to VCC is recommended on SO if shared with other devices or used in noisy environments. WP and HOLD are active-low inputs and may benefit from weak pull-ups (10–100 kΩ) if left unconnected in the system.

How does page write operation work in the 25LC080D-I/SN, and what happens if I cross a page boundary?

The 25LC080D-I/SN has a fixed 32-byte page buffer. During a page write, all bytes must reside within the same physical page (e.g., addresses 0x000–0x01F). If a write command crosses a 32-byte boundary (e.g., starting at 0x01E and writing 5 bytes), the excess bytes wrap to the start of the same page (0x000), overwriting prior data. The 25LC080D-I/SN does not auto-increment across pages - software must detect and split writes at page boundaries to avoid corruption.

Can the 25LC080D-I/SN be used in automotive applications requiring AEC-Q200 qualification?

No, the 25LC080D-I/SN is rated for Industrial temperature range (−40°C to +85°C) and is not AEC-Q200 qualified. For automotive use, Microchip offers the 25LC080D-E/SN variant, which is specified for −40°C to +125°C and undergoes additional stress testing. The 25LC080D-I/SN may function in under-hood environments but lacks the qualification documentation, lot traceability, and failure-rate validation required for automotive safety-critical systems.

What is the purpose of the HOLD pin on the 25LC080D-I/SN, and how must it be used correctly?

The HOLD pin on the 25LC080D-I/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, the pin must be pulled low while SCK is low; releasing HOLD requires bringing it high while SCK remains low. Violating this timing causes undefined behavior. During HOLD, SI, SCK, and SO enter high-impedance, and only CS retains control - ensuring bus integrity across multi-master systems.