Microchip Technology 25LC080D-E/P

Overview

25LC080D-E/P from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 32-byte page size, 2.5–5.5 V supply range, and automotive-grade temperature support (−40°C to +125°C). It features self-timed 5 ms max write cycles, hardware write protection via WP pin, and HOLD functionality for interrupt-safe bus suspension. Used in engine control units, ADAS sensor modules, and automotive infotainment firmware storage.

For engineers reviewing the 25LC080D-E/P datasheet, 25LC080D-E/P pinout, 25LC080D-E/P application, or 25LC080D-E/P equivalent, key selection criteria include page size compatibility, automotive temperature qualification, SPI timing at 10 MHz (VCC ≥ 4.5 V), and hardware write-protect implementation using WPEN bit and WP pin.

Technical Context

The 25LC080D-E/P implements a standard SPI Mode 0,0 interface with separate SI (input) and SO (output) lines, requiring CS assertion for device selection and SCK synchronization on rising/falling edges respectively. Its internal architecture includes a 1024 × 8-bit EEPROM array, page latches, HV generator, and STATUS register with WIP, WEL, BP0/BP1, and WPEN bits.

Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate internal 5 ms erase/write cycle; page writes are limited to 32 bytes within a single physical page boundary (000h–01Fh, 020h–03Fh, etc.). HOLD suspends ongoing serial transfers while preserving internal state, enabling host CPU to service higher-priority interrupts without sequence restart.

Key Specifications

Pinout & Package

25LC080D-E/P is packaged in 8-lead PDIP (Plastic Dual In-Line Package) with 300 mil body width, RoHS-compliant matte tin lead finish, and industrial-standard pin layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080D-I/P, the 25LC080D-E/P adds guaranteed operation at +125°C and automotive qualification documentation; compared with AT25DF041A-SSH-T, it retains pin-level compatibility with legacy 25LCxx designs, supports HOLD-based interrupt handling, and offers simpler write-protection via dedicated WP pin.

Availability

25LC080D-E/P is available at Aetrix Electronics and suitable for automotive powertrain control, ADAS sensor calibration, and infotainment firmware patching requiring stable component supply across extended product lifecycles.

Supply support for 25LC080D-E/P 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/P belongs to Microchip's 25XX080C/D family of SPI Serial EEPROMs, designed specifically for automotive and industrial applications requiring robust nonvolatile storage with hardware write protection and interrupt-safe bus operation.

FAQ

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

The 25LC080D-E/P supports up to 10 MHz SPI clock frequency when VCC is 4.5 V to 5.5 V. At 2.5 V ≤ VCC < 4.5 V, the maximum clock is 5 MHz; below 2.5 V, it drops to 3 MHz. These limits ensure reliable setup/hold timing for SI and SO signals across automotive temperature extremes. The 25LC080D-E/P datasheet specifies AC characteristics including TCSS, TCSH, and Tsu to validate timing margin at each voltage band.

How does the HOLD pin function during an active SPI transaction on the 25LC080D-E/P?

The HOLD pin on the 25LC080D-E/P suspends ongoing SPI communication when pulled low while SCK is low, placing SI, SO, and SCK in high-impedance states without resetting internal state. The 25LC080D-E/P resumes exactly where it left off upon HOLD returning high during SCK low phase. This enables microcontrollers to service time-critical interrupts (e.g., CAN message arrival) without corrupting EEPROM transfers or requiring retransmission.

What page size does the 25LC080D-E/P use, and why does it matter for firmware updates?

The 25LC080D-E/P uses a 32-byte page size, meaning up to 32 bytes can be written in a single page write command. This reduces firmware update time significantly versus byte-wise writes and avoids exceeding internal write-cycle limits. For example, updating a 256-byte calibration table requires only eight page writes instead of 256 individual writes. The 25LC080D-E/P enforces strict page boundaries: crossing them causes data wraparound within the same page, so application firmware must align writes accordingly.

Does the 25LC080D-E/P support hardware write protection, and how is it configured?

Yes, the 25LC080D-E/P supports hardware write protection via Pin 3 (WP) combined with the WPEN bit (bit 7) in its STATUS register. When WP is low AND WPEN = 1, writes to the nonvolatile STATUS register bits (BP0/BP1/WPEN) are blocked. Memory array writes remain permitted unless BP0/BP1 are set to protect specific segments. The 25LC080D-E/P powers up with WPEN = 0, allowing initial STATUS register configuration even if WP is grounded - a key feature for flexible system integration.

What is the endurance and data retention specification for the 25LC080D-E/P?

The 25LC080D-E/P guarantees more than 1 million erase/write cycles and greater than 200 years of data retention at +25°C, validated per JEDEC standards. Endurance testing was performed at 25°C and VCC = 5.5 V; retention is characterized across the full automotive temperature range (−40°C to +125°C). These figures apply to the entire 1024-byte array and are integral to the 25LC080D-E/P qualification for ASIL-B safety-related data logging in automotive applications.