Manufacturer Part Number

25LC040A-E/SN

Description

EEPROM memory IC with 4Kbit capacity. Uses SPI interface, operates up to 10 MHz. Comes in 8-pin SOIC package for surface mounting. Provides non-volatile storage, suitable for embedded and data retention applications. Wide operating voltage and temperature range. RoHS3 compliant and in stock.

Specifications

Memory type: EEPROM, non-volatile

Capacity: 4Kbit (512 x 8 bits)

Interface: SPI, max clock 10 MHz

Voltage range: 2.5V to 5.5V

Write cycle time: 5ms per word or page

Operating temperature: -40°C to +125°C

Package: 8-SOIC (3.90mm width)

Mounting: Surface mount

Moisture sensitivity: MSL 1 (unlimited)

Product status: Active

Compliance: RoHS3, REACH unaffected

ECCN: EAR99

HTSUS: 8542.32.0051

Device Structure

Monolithic CMOS integrated circuit

8-pin SOIC encapsulation

SPI bus connection

Internal memory array of 512 x 8bits

On-chip logic for read, write, erase functions

Surface-mountable for automated PCB assembly

Performance Characteristics

Fast SPI data access up to 10 MHz

Reliable data retention (non-volatile)

Short write cycle time (5ms) for efficient updates

Wide operating temperature suitable for industrial use

Stable over wide voltage range

Low power consumption compared to parallel EEPROM

Application Environments

Industrial and automotive electronics

Consumer devices requiring non-volatile memory

Embedded systems, microcontroller add-on

Smart meters, configuration data storage

Calibration parameters, small data logging

Systems needing data retention through power cycles

Selection Guidelines

Select if non-volatile, small-capacity memory is needed

Use for SPI bus-compatible systems

Suitable for surface-mount PCB designs

Check voltage and temperature ratings match your application

Consider for reliable long-term data storage

Compare memory size (4Kbit) with your application requirements

Usage Considerations

Observe maximum clock frequency (10MHz) for SPI to avoid data errors

Write cycle time is 5ms; avoid frequent writes if speed is critical

Ensure proper power supply within 2.5V to 5.5V for stable operation

Follow MSL 1 handling procedures for unlimited shelf life

Validate pin-out and SOIC package dimensions for PCB compatibility

For firmware, verify correct read/write/erase timing

Data protection features and lock bits should be reviewed for security-sensitive data

Potential Equivalent/Replacement Models

Common alternatives from Microchip Technology include:

25LC040A-I/SN (industrial temp variant)

25AA040A-E/SN (same size, different supply voltage range)

Other replacements:

AT25C04 or AT25DQ041 from Microchip (compatible SPI EEPROMs)

STMicroelectronics M95040-WMN6TP (4Kbit SPI EEPROM, nearly equivalent)

ON Semiconductor CAT25040 (4Kbit SPI EEPROM)

If no equivalent model fits your needs, contact the Ariat-Tech sales team for customized solutions and further guidance.

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