MAXIM MAX31911AUI+

The MAX31911 industrial interface serializer translates, conditions, and serializes the 24V digital output of sensors and switches used in industrial, process, and building automation to 5V CMOS-compatible signals required by microcontrollers. It provides the front-end interface circuit of a programmable logic controller (PLC) digital input module.

• Very Low Power and Heat Dissipation
• Low Quiescent Current (1.4mA typ)
• Highly Accurate and Stable Input Current Limiters, Adjustable from 0.5mA to 6mA
• High Integration Reduces BOM Count, Board Size, and System Cost
• Eight High-Voltage Input Channels (36V max)
• On-Chip 8-1 Serialization with SPI Interface
• On-Chip 5V Regulator
• On-Chip Overtemperature Indicator
• On-Chip Field Supply Voltage Monitor
• Integrated Debounce Filters, Selectable from 0 to 3ms
• Robust Features and Performance for Industrial Environments
• Multibit CRC Code Generation and Transmission for Error Detection and More Reliable Data Transmission
• High ESD Immunity on All Field Input Pins
• Accepts Industry Standard Input Types
• Configurable for IEC 61131-2 Input Types 1, 2, and 3
• Flexible Power Supply Capability Enables Usage in 5V, 12V, 24V, and Higher Voltage Systems
• Wide Operating Field Supply Range of 7V to 36V
• Can Be Powered from the Logic-Side Using a 5V Supply

• Digital Input Modules for PLCs
• Industrial, Building, and Process Automation
• Motor Control