MAX31911AUI+

MAX31911AUI+ is an industrial, octal, digital input translator/serializer. 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. The device features integrated current limiting, low-pass filtering, and channel serialization. Input current limiting allows a significant reduction in power consumed from the field voltage supply as compared to traditional discrete resistor-divider implementations. Selectable on-chip lowpass filters allow flexible debouncing and filtering of sensor outputs based on the application. Applications include digital input modules for PLCs, industrial, building, and process automation, and motor control.

• Very low power and heat dissipation
• 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 reliable data transmission
• Accepts industry standard input types, configurable for IEC 61131-2 input types 1, 2, and 3
• 28 TSSOP package
• Temperature range from -40°C to +125°C

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