The MAX22194 is an industrial quad digital input that translates four industrial 24V or TTL level inputs to logic level outputs. The device has a serial interface allowing configuration and reading of serialized data through SPI. The input channels are individually configurable as sinking (p-type) or sourcing (n-type) inputs. Current limiters on each digital input minimize power dissipation while ensuring compliance with the IEC 61131-2 standard. With a single current-setting resistor, the inputs are individually configurable for Type 1/3, Type 2, TTL, or HTL (high-impedance 24V levels). The current sinks or sources can be individually disabled.Every input channel has a programmable glitch/debounce filter.The MAX22194 can be powered from a field supply from 8V up to 36V for sink/source operation and has an integrated 5V linear regulator that can provide up to 20mA of load current.APPLICATIONSProgrammable Logic ControllersFactory AutomationProcess Control