The MAX31915AUI+ is a industrial, octal, digital input translator in 38 pin TSSOP package. It translates and conditions 24V digital output of sensors and switches used in industrial process and building automation to 5V CMOS-compatible signals required by microcontrollers. It provides front end interface circuit of a programmable logic controller (PLC) digital input module. The signal voltage translation is performed in conjunction with input current limiting and lowpass filtering. Input current limiting allows a significant reduction in power consumed from the field-supply voltage as compared to traditional discrete resistor divider implementations. It is used in digital input modules for programmable logic controllers (PLCs), industrial automation, building automation and process automation.
● Supply voltage range is 7V to 36V, can be optionally powered from logic side using a 5V supply
● Operating temperature range from -40°C to 125°C
● Low power and low heat dissipation, very low quiescent current
● Extremely accurate and stable input current limiters
● Configurable inputs for IEC 61131-2 input types 1, 2 and 3 or for standard CMOS logic levels
● 0.5mA to 6mA configurable input current limiting
● Selectable input filtering and debounce, 0, 25µs, 0.75ms and 3ms settings
● 8 high voltage input channels is 36V (max), on-chip field-supply voltage monitor
● 8 CMOS logic outputs for high speed simultaneous transfer of all input states to the controller
● On-chip 5V regulator, on-chip overtemperature indicator
