MAX31913AUI+

MAX31913AUI+ is an industrial, octal, digital input translator/serializer. The MAX31913 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 PLC digital input module. The device features integrated current limiting, lowpass 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. On-chip serialization allows a drastic reduction in the number of optocouplers used for isolation. Applications include digital input modules for PLCs, industrial, building, and process automation, and motor control.

• Very low power and heat dissipation, energy-less field-side LED drivers
• High integration reduces BOM count, board size, and system cost
• 8 high-voltage input channels (36V max), on-chip 8-1 serialization with SPI interface
• On-chip 5V regulator, on-chip overtemperature indicator
• Dual on-chip field supply voltage monitor, integrated debounce filters, selectable from 0 to 3ms
• Robust features and performance for industrial environments
• Accepts industry standard input types, configurable for IEC 61131-2 input types 1, 2, and 3
• Wide operating field supply range of 7V to 36V
• 28 TSSOP package
• Temperature range from -40°C to +125°C

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