Microchip Technology 25LC080CT-H/SN

Overview

25LC080CT-H/SN from Microchip Technology is an 8-Kbit (1,024 × 8) SPI serial EEPROM with extended temperature operation from −40°C to +150°C, 5 MHz max clock speed, and 16-byte page write capability. It features hardware write protection via WP pin and STATUS register control, self-timed 6 ms write cycles, and AEC-Q100 qualification for automotive under-hood applications.

For engineers reviewing the 25LC080CT-H/SN datasheet, 25LC080CT-H/SN pinout, 25LC080CT-H/SN application, or 25LC080CT-H/SN equivalent, key selection criteria include high-temp SPI EEPROM reliability, block-level write protection granularity, HOLD pin support for interrupt-safe bus arbitration, and SOIC-8 packaging compatible with industrial and automotive PCB layouts.

Technical Context

The 25LC080CT-H/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 configurable array protection and hardware-controlled write disable.

It supports byte and page writes (up to 16 bytes per page), sequential read with automatic address increment, and power-on reset of the write enable latch. The HOLD pin suspends ongoing transfers without resetting the internal state, allowing host microcontrollers to service higher-priority interrupts while preserving transaction context.

Key Specifications

Pinout & Package

8-Lead SOIC (SN) package, 3.90 mm body width, RoHS-compliant matte tin finish, JEDEC MS-012AC variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AT25DF041A-SSH-T and BR24G08FJ-WE2, the 25LC080CT-H/SN uniquely combines AEC-Q100 Grade 0 qualification, HOLD pin support for deterministic interrupt handling, and full 2.5–5.5V operation - making it the only choice for automotive-grade SPI EEPROM applications requiring robustness across extreme thermal and electrical conditions.

Availability

25LC080CT-H/SN is available at Aetrix Electronics and suitable for automotive ECU programming, industrial motor drive calibration, and medical device audit logging requiring stable component supply across extended product lifecycles.

Supply support for 25LC080CT-H/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 components, and memory solutions, headquartered in Chandler, Arizona, with global manufacturing and support infrastructure.

The 25LCxxx family delivers mid-density serial EEPROMs optimized for automotive, industrial, and medical applications demanding extended temperature operation, high endurance, and SPI bus compatibility with legacy and modern microcontrollers.

FAQ

What is the maximum clock frequency supported by the 25LC080CT-H/SN across its full voltage and temperature range?

The 25LC080CT-H/SN supports up to 5 MHz at VCC = 4.5–5.5V and TA = −40°C to +150°C. At lower voltages (2.5–4.5V), the maximum clock frequency reduces to 3 MHz. These limits are specified in Table 1-2 of the DS20002131D datasheet and apply across the full extended temperature range without derating.

How does the HOLD pin function during an active SPI read or write sequence in the 25LC080CT-H/SN?

The HOLD pin in the 25LC080CT-H/SN suspends ongoing SPI communication when pulled low while SCK is low, placing SI, SCK, and SO in high-impedance states. Internal address and instruction state are preserved, allowing resume from the exact point upon returning HOLD to high during SCK low - critical for deterministic interrupt handling in real-time systems using the 25LC080CT-H/SN.

What write protection mechanisms are implemented in the 25LC080CT-H/SN, and how do they interact?

The 25LC080CT-H/SN implements dual-layer write protection: (1) software-controlled BP0/BP1 bits in the STATUS register to protect memory blocks, and (2) hardware-based WP pin functionality enabled only when WPEN=1. When WP=low and WPEN=1, nonvolatile STATUS register writes are blocked - protecting configuration settings even if firmware is compromised. Both mechanisms operate independently and are documented in Table 5-1 of DS20002131D.

Is the 25LC080CT-H/SN pin-compatible with other members of the 25LCxxx family, such as the 25LC080D or 25LC160C?

Yes, the 25LC080CT-H/SN shares identical 8-lead SOIC (SN) packaging and pinout with all 25LCxxx variants including 25LC080D and 25LC160C. However, functional differences exist: 25LC080CT-H/SN uses 16-byte pages (C version), while 25LC080D uses 32-byte pages (D version); 25LC160C doubles the density to 16 Kbit. Firmware must validate density and page size before issuing write commands to avoid unintended wraparound behavior in the 25LC080CT-H/SN.

What is the endurance specification for the 25LC080CT-H/SN, and under what conditions is it guaranteed?

The 25LC080CT-H/SN guarantees >1,000,000 erase/write cycles per memory location, characterized at 25°C and VCC = 5.5V using page-mode writes. This endurance applies across the full −40°C to +150°C operating range per AEC-Q100 stress testing protocols, with no reduction in cycle count required for high-temperature operation - a key differentiator versus commercial-grade EEPROMs.