Manufacturer Part Number

25LC040A-I/SN

Description

4Kbit non-volatile EEPROM memory chip. Serial Peripheral Interface (SPI) for communication up to 10 MHz. Packaged in 8-SOIC case. Wide supply voltage range (2.5V to 5.5V). Suited for storage of small amounts of data like calibration, system parameters, or settings. Surface Mount, ideal for automated assembly.

Specifications

Total memory capacity of 4096 bits, organized as 512 bytes (512 x 8 bits). SPI communication bus at max 10 MHz clock. Write cycle time is 5ms per byte/page. Operating temperature from -40°C to +85°C. Voltage supply required is between 2.5V and 5.5V. Moisture Sensitivity Level is 1 (unlimited). RoHS3 compliant, REACH unaffected.

Device Structure

Single-chip EEPROM device. 8-pin SOIC (Small Outline Integrated Circuit) for space saving on circuit boards. Memory cell array with control logic for SPI operation. No additional passives required for memory operation.

Performance Characteristics

Reliable non-volatile data retention, retains memory contents for years without power. Fast write and erase cycles (5ms typical). High endurance to repeated write/erase cycles. Low power consumption suitable for portable and battery-powered devices. Stable operation over industrial temperature range.

Application Environments

Commonly used in microcontroller-based systems to store system configuration, log data, event records, firmware settings, or security keys. Suitable for consumer electronics, industrial control, automotive modules, instrumentation, and data acquisition systems. Performs well in harsh temperature settings.

Selection Guidelines

Choose this device when low density EEPROM is needed with SPI compatibility. Ideal for storing small settings and regular parameter data. Compare size, voltage, interface, and speed requirements with your application needs, ensuring compatibility with the microcontroller SPI port and available board footprint.

Usage Considerations

Follow datasheet guidelines for correct SPI timing and voltage levels. Avoid excessive writes to maximize device longevity. Ensure supply voltage remains within specified range for reliable operation. Device is not suitable for high-capacity memory applications. Mounting is surface type, so plan for SOIC footprint during PCB layout.

Potential Equivalent/Replacement Models

Equivalent or alternative models are available. Check the following list:

Microchip 25LC040-E/SN (industrial temperature, similar specs)

Microchip 25AA040A-I/SN (same density, different ID code)

ON Semiconductor CAT25040 (compatible 4Kbit EEPROM, SPI interface)

STMicroelectronics M95040-WMN6TP (compatible 4Kbit EEPROM, SPI interface)

Atmel AT25040B-SH (similar 4Kbit SPI EEPROM)

If further assistance is needed, or if suitable equivalency cannot be confirmed, please contact Ariat-Tech sales team for expert support and current stock information.

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