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Analog Devices MAX22199 Octal Industrial Digital Input translates eight 24V current-sinking industrial inputs to a serialized SPI-compatible output that interfaces with 3V to 5.5V logic. The IEC 61131-2 compliant industrial digital input device operates as eight Type 1/Type 3 digital inputs or four Type 2 digital inputs. The MAX22199 Octal Industrial Digital Input features diagnostic functions, including thermal shutdown, 24V under voltage alarm, 24V missing voltage alarm, and SPI and CRC communication error detection. All of the faults offer the configuration to generate an interrupt using the FAULT pin.
The Analog Devices MAX22199 has a 4-pin SPI interface and utilizes the LATCH input for synchronizing input data sampling across multiple devices. The SPI interface operates at 3.3V or 5V logic levels controlled by the VL pin and is available in a 5mm x 5mm TQFN package.
