Microchip Technology 25LC040AX-E/ST

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Microchip 25LC040AX-E/ST - 4Kbit SPI Serial EEPROM Memory

The 25LC040AX-E/ST from Microchip Technology is a high-reliability 4Kbit (512 x 8) serial EEPROM designed for demanding embedded applications. This non-volatile memory solution features an industry-standard SPI interface, making it ideal for data storage in automotive, industrial control, medical devices, and consumer electronics.

Key Features & Benefits

  • Wide Voltage Range: Operates from 2.5V to 5.5V, compatible with both 3.3V and 5V systems
  • Extended Temperature Range: -40°C to 125°C (TA) for harsh industrial and automotive environments
  • Fast SPI Interface: 10 MHz clock frequency enables rapid data access
  • Compact 8-TSSOP Package: Space-saving surface mount design (0.173", 4.40mm width)
  • Low Power Consumption: Ideal for battery-powered and energy-efficient applications
  • High Endurance: 1,000,000 erase/write cycles minimum
  • Data Retention: 200+ years at 25°C

Applications

This EEPROM is perfect for storing calibration data, configuration settings, security codes, and small data logs in:

  • Automotive electronics and ECU systems
  • Industrial automation and control systems
  • Medical equipment and diagnostic devices
  • Smart meters and IoT sensor nodes
  • Consumer electronics and appliances
  • Embedded systems requiring non-volatile storage

Technical Advantages

The 25LC040AX-E/ST offers superior reliability with its EEPROM technology, providing byte-level write capability without the need for block erasure. The SPI interface requires only four pins, minimizing PCB space and simplifying design integration. With a 5ms write cycle time and hardware write protection features, this memory chip ensures both speed and data security.

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Related Products & Resources

Explore our complete range of Memory Semiconductor Devices including EEPROM, Flash, DRAM, and SRAM solutions from 64 bits to 6 terabits. Browse our complete semiconductor catalog or visit our technical blog for application notes, design guides, and industry insights.

Product attributes Property Value
Manufacturer Microchip Technology
Product Series
Packaging Tube |
Memory Type Non-Volatile
Memory Format EEPROM
Technology EEPROM
Memory Size 4Kbit
Memory Organization 512 x 8
Memory Interface SPI
Clock Frequency 10 MHz
Write Cycle Time - Word, Page 5ms
Access Time -
Voltage - Supply 2.5V ~ 5.5V
Operating Temperature -40°C ~ 125°C (TA)
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case 8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package 8-TSSOP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY