Manufacturer Part Number

25LC040AT-I/SN

Description

Microchip 25LC040AT-I/SN is a small non-volatile memory chip. It provides 4Kbit EEPROM storage using SPI interface, suitable for fast and efficient data storage. The chip operates up to 10 MHz SPI clock speed for quick reads and writes. It comes in an 8-pin SOIC package, making it easy to mount on standard PCBs. The device supports industrial temperature range and is compliant with RoHS3 and REACH.

Specifications

Memory size: 4Kbit (512 x 8)

Interface: SPI, up to 10 MHz

Voltage supply: 2.5V to 5.5V

Write cycle time: 5ms per word/page

Temperature range: -40°C to +85°C

Mounting: Surface-mount, 8-SOIC package (3.90mm width)

Moisture sensitivity: MSL 3 (168 hours)

RoHS3 and REACH compliant

Device Structure

Monolithic integrated circuit

8-pin SOIC package for surface mounting

SPI pins for data communication

Internal organization of 512 bytes, 8 bits per byte

Performance Characteristics

High-speed SPI operation (up to 10 MHz)

Fast write cycle time (5ms)

Reliable non-volatile data retention

Stable operation across wide voltage and temperature ranges

Low power requirements

Application Environments

Consumer electronics

Industrial automation

Data logging and calibration storage

Configuration data retention in embedded systems

Replacement for older EEPROM memory modules

Suitable for harsh environments due to wide temperature range

Selection Guidelines

Choose this model if you need up to 4Kbit serial EEPROM storage

Verify the board supports SPI at required voltage (2.5V–5.5V)

Ensure an 8-SOIC footprint is available for mounting

Check system compatibility for industrial temperature needs

Make sure write cycle speed and memory density meet your application requirements

Usage Considerations

Observe correct SPI protocol for data transfers

Take precautions to avoid exceeding voltage and temperature limits

Protect against excessive moisture (comply with MSL 3 packaging rules)

Allow enough time for write cycles (5ms per word/page)

Monitor inventory levels for large production needs (currently 26,800 pcs in stock)

RoHS3 compliance recommended for green designs

Potential Equivalent/Replacement Models

There are equivalent options available. Common direct alternatives include other Microchip 25LC040 family ICs with similar EEPROM size and SPI interface:

25LC040A-I/SN (Microchip)

25LC040-I/SN (Microchip, older revision)

AT93C46D-SH-B (Microchip/Atmel, similar 4Kbit SPI EEPROM, different organization)

CAT25040VI-GT3 (ON Semiconductor, 4Kbit SPI EEPROM, same footprint)

ST M95040-WMN6TP (STMicroelectronics, 4Kbit SPI EEPROM, 8-SOIC)

S-25C040AFTM-TB-G (ABLIC, similar size and features)

Check pinout compatibility and electrical specifications for drop-in replacement. If unsure, contact Ariat-Tech sales team for guidance on alternatives and selecting the best solution for your application.

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