Microchip Technology 25LC080BT-E/SN

Overview

25LC080BT-E/SN from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 32-byte page size, 10 MHz max clock, and industrial-temperature operation (−40°C to +85°C). It features hardware write protection via WP pin, HOLD suspend functionality, and block-level array protection for embedded microcontroller data logging and configuration storage.

For engineers reviewing the 25LC080BT-E/SN datasheet, 25LC080BT-E/SN pinout, 25LC080BT-E/SN application, or 25LC080BT-E/SN equivalent, key selection criteria include VCC range (2.5–5.5 V), page write capability (32 bytes), endurance (1,000,000 cycles), data retention (>200 years), and SOIC-8 (SN) package compatibility with SPI bus timing constraints.

Technical Context

The 25LC080BT-E/SN implements a standard SPI Mode 0,0 interface with separate SI and SO lines, requiring CS, SCK, SI, SO, WP, HOLD, VCC, and VSS. Its internal architecture includes a status register with WIP, WEL, BP0/BP1, and WPEN bits enabling programmable block protection and hardware write-disable control.

Write operations require explicit WREN instruction followed by CS high-to-low transition to initiate self-timed internal write cycle (≤5 ms). HOLD pin allows pausing ongoing serial transfers without resetting sequence state, while sequential read supports automatic address increment and wraparound at 03FFh.

Key Specifications

Pinout & Package

25LC080BT-E/SN is packaged in 8-lead SOIC (SN), measuring 4.90 mm × 3.90 mm × 1.75 mm, with gull-wing leads and industry-standard pinout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080AT-E/SN, the 25LC080BT-E/SN offers double the page size for faster bulk writes; compared with AT25080B-SSHL-T, it provides Microchip's proven block protection model and simpler HOLD timing but at lower maximum clock rate.

Availability

25LC080BT-E/SN is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body control modules, medical device parameter backup, and smart energy meter firmware settings requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 25LC080BT-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 microcontrollers, analog devices, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 25LC080BT-E/SN belongs to Microchip's 25LCxx family of SPI Serial EEPROMs, designed specifically for robust, low-power, and pin-efficient nonvolatile storage in embedded systems requiring high endurance and long-term data integrity.

FAQ

What is the maximum clock frequency supported by the 25LC080BT-E/SN?

The 25LC080BT-E/SN 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 drops to 5 MHz, and at 1.8 V ≤ VCC < 2.5 V, it is rated for 3 MHz - though the 25LC080BT-E/SN operates only within 2.5–5.5 V, so 5 MHz is its minimum guaranteed speed. This ensures compatibility with most 3.3 V and 5 V microcontrollers without violating AC timing limits.

Does the 25LC080BT-E/SN support hardware write protection?

Yes, the 25LC080BT-E/SN supports hardware write protection using the WP pin in conjunction with the WPEN bit in its status register. When WP is held low and WPEN = 1, writes to the nonvolatile status register bits (BP0, BP1, WPEN) are disabled. Array writes remain controllable via software-configured block protection (BP0/BP1), making the 25LC080BT-E/SN suitable for systems requiring dual-layer protection against accidental or malicious reconfiguration.

What is the page size of the 25LC080BT-E/SN and why does it matter?

The 25LC080BT-E/SN has a 32-byte page size, meaning up to 32 bytes can be written in a single page write command - provided all addresses fall within the same physical page boundary (e.g., 0x000–0x01F). This doubles the burst efficiency of the 'A' version (16-byte page), reducing SPI transaction overhead and write latency in applications like firmware parameter updates. Crossing page boundaries causes data wraparound, so firmware must enforce alignment - a key design consideration for reliable use of the 25LC080BT-E/SN.

How does the HOLD pin function on the 25LC080BT-E/SN?

The HOLD pin on the 25LC080BT-E/SN suspends an ongoing SPI transaction without resetting internal state. When asserted low (with SCK low), SI, SCK, and SO enter high-impedance, allowing the host MCU to service higher-priority interrupts. Resuming requires bringing HOLD high while SCK remains low. This deterministic pause/resume behavior makes the 25LC080BT-E/SN ideal for real-time systems where SPI EEPROM access must coexist with time-critical tasks without data loss or re-synchronization overhead.

What temperature range is specified for the 25LC080BT-E/SN?

The 25LC080BT-E/SN is rated for the Industrial temperature range of −40°C to +85°C, as indicated by the 'I' suffix in its full ordering code (25LC080B-I/SN). The 'T' in 25LC080BT-E/SN reflects tape-and-reel packaging, not temperature grade - the 'E' denotes Automotive grade, but this specific variant (T-E/SN) is documented in Microchip's DS21808D as an Industrial-grade part in SOIC-8 (SN) package. Always verify ambient operating limits against the official datasheet revision for final design validation.