Microchip Technology 25LC080T-I/SN

Overview

25LC080T-I/SN from Microchip Technology Inc. is an 8 Kbit SPI Serial EEPROM with 1024 × 8-bit organization, 2.5–5.5 V supply range, and industrial temperature support (−40°C to +85°C). It features 16-byte page write capability, 5 ms max internal write cycle time, and hardware write protection via WP pin and Status register. It is used in embedded systems for nonvolatile storage of calibration data, configuration settings, and firmware parameters.

For engineers reviewing the 25LC080T-I/SN datasheet, 25LC080T-I/SN pinout, 25LC080T-I/SN application, or 25LC080T-I/SN equivalent, this page delivers verified electrical specs, SPI timing constraints, HOLD/CS/WP functional behavior, package dimensions, and real-world substitution guidance - all confirmed against DS21230E and Microchip's official ordering documentation.

Technical Context

The 25LC080T-I/SN implements a standard SPI Mode 0,0/Multi-Mode 1,1 interface with separate SI (data in) and SO (data out) lines, requiring CS, SCK, and optional HOLD/WP control. Its internal architecture includes a 16-byte page latch, status register with WIP/WEL/BP0/BP1 bits, and high-voltage generator for EEPROM programming.

It supports block write protection (none/¼/½/all array), self-timed erase/write cycles, and power-on data protection via automatic WEL reset. The device operates at up to 2 MHz clock frequency under 2.5–4.5 V and maintains 1 M endurance cycles with >200 years data retention.

Key Specifications

Pinout & Package

25LC080T-I/SN is packaged in an 8-pin SOIC (150 mil) with JEDEC MS-012 footprint (D = 4.90 mm, E1 = 3.91 mm, pitch = 1.27 mm). Pin 1 is marked with a beveled corner or dot; orientation follows standard SOIC conventions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 25LC080T-I/SN, the 25AA080T-I/SN offers wider voltage flexibility but reduced speed, while the 25LC080A-I/SN provides identical performance with enhanced reliability and official design-in recommendation - making it the preferred upgrade path.

Availability

25LC080T-I/SN is available at Aetrix Electronics and suitable for industrial sensor calibration, medical device configuration, automotive body control, and smart energy metering applications requiring stable component supply and long-term obsolescence management.

Supply support for 25LC080T-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 25LC080T-I/SN belongs to Microchip's legacy SPI Serial EEPROM product line, designed specifically for cost-sensitive, low-power embedded systems requiring reliable nonvolatile storage with simple 4-wire interface and hardware write protection.

FAQ

What is the maximum clock frequency supported by the 25LC080T-I/SN?

The 25LC080T-I/SN supports up to 2 MHz maximum clock frequency when VCC is between 2.5 V and 4.5 V. At VCC = 4.5–5.5 V, the limit rises to 3 MHz, but the 25LC080 variant is specified only up to 2 MHz per DS21230E. This timing constraint directly affects SPI throughput in applications like firmware parameter loading or sensor log buffering, where sustained read/write bandwidth matters.

How does the HOLD pin function during an active SPI transaction on the 25LC080T-I/SN?

The HOLD pin on the 25LC080T-I/SN suspends ongoing SPI communication without resetting internal state - the device retains its address pointer and command context. To activate HOLD, the pin must be pulled low while SCK is low; resuming requires bringing HOLD high while SCK remains low. During HOLD, SI/SO/SCK enter high-impedance, allowing the host MCU to service higher-priority interrupts before continuing the exact same transaction.

What write protection options are available on the 25LC080T-I/SN?

The 25LC080T-I/SN provides dual-layer write protection: (1) hardware-based via WP pin enabled by WPEN bit in Status register, locking only nonvolatile Status bits; and (2) software-configurable block protection using BP0/BP1 bits to lock none, upper 1/4 (0300h–03FFh), upper 1/2 (0200h–03FFh), or full array (0000h–03FFh). This allows secure partitioning of bootloader code, calibration data, and runtime variables within the same 8 Kbit space.

Is the 25LC080T-I/SN pin-compatible with the 25LC080A-I/SN?

Yes, the 25LC080T-I/SN is pin-compatible with the 25LC080A-I/SN - both use identical 8-pin SOIC (SN) packaging and share the same pinout, instruction set, and AC/DC specifications. The 'A' suffix denotes an enhanced revision with improved ESD robustness (>6 kV HBM vs. >4 kV) and updated qualification; Microchip explicitly recommends 25LC080A for new designs per DS21230E page 1.

What is the endurance and data retention specification for the 25LC080T-I/SN?

The 25LC080T-I/SN guarantees 1 million write/erase cycles and greater than 200 years of data retention at +85°C ambient. These values are characterized - not tested per unit - and apply across the full industrial temperature range (−40°C to +85°C). This makes the device suitable for applications involving frequent reconfiguration, such as adaptive control algorithms or field-updatable calibration tables in industrial equipment.