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MAX3140EEI+ RS232/RS485 UART Controller with SPI Interface

The MAX3140EEI+ from Analog Devices Inc./Maxim Integrated is a high-performance, low-power UART controller designed for industrial, automotive, and embedded system applications requiring reliable RS232 and RS485 serial communication. This advanced controller integrates SPI and UART interfaces, making it ideal for microcontroller-based designs that demand robust protocol conversion and multi-drop networking capabilities.

Engineered for harsh environments, the MAX3140EEI+ operates across an extended temperature range of -40°C to 85°C while maintaining ultra-low power consumption of just 640µA. Its compact 28-QSOP package delivers space-efficient integration for high-density PCB layouts in aerospace, medical devices, telecommunications equipment, and industrial automation systems.

Key Features & Benefits

  • Dual Protocol Support: Seamlessly handles both RS232 and RS485 communication standards for versatile connectivity
  • Flexible Interface Options: SPI and UART interfaces enable easy integration with a wide range of microcontrollers and processors
  • Ultra-Low Power Design: Only 640µA supply current extends battery life in portable and remote monitoring applications
  • Industrial Temperature Range: Reliable operation from -40°C to 85°C ensures performance in extreme environmental conditions
  • Compact Footprint: 28-QSOP package optimizes board space utilization in space-constrained designs
  • RoHS Compliant: Meets environmental standards for lead-free manufacturing
  • Wide Supply Voltage Range: 4.75V to 5.25V operation provides flexibility in power supply design

Typical Applications

  • Industrial automation and process control systems
  • Automotive diagnostic and communication interfaces
  • Medical device data acquisition and monitoring
  • Telecommunications infrastructure equipment
  • Embedded system serial communication bridges
  • Multi-drop RS485 network nodes
  • Point-of-sale terminals and payment systems

Related Products & Resources

Explore our complete range of high-reliability controllers and protocol bridge ICs for your embedded system projects. Visit HQICKEY for premium aerospace, automotive, industrial, medical, and telecommunications semiconductor solutions. Stay updated with the latest industry insights and product announcements on our News blog.

Product attributes Property Value
Manufacturer Analog Devices Inc./Maxim Integrated
Product Series Tube
Packaging Tube |
Protocol RS232, RS485
Function Controller
Interface SPI, UART
Standards -
Voltage - Supply 4.75V ~ 5.25V
Current - Supply 640µA
Operating Temperature -40°C ~ 85°C
Grade -
Qualification -
Package / Case 28-SSOP (0.154", 3.90mm Width)
Supplier Device Package 28-QSOP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY