EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX22199 Octal Industrial Digital Input General Description Benefits and Features The MAX22199 is an IEC 61131-2 compliant industrial High Integration Reduces BOM Count and Board Space digital input device. The MAX22199 translates eight 24V Eight Input Channels with Serializer current-sinking industrial inputs to a serialized SPI- Operates Directly from Field Supply (7V to 65V) compatible output that interfaces with 3V to 5.5V logic. Compatible with 3.3V or 5V Logic It can operate as eight Type 1/Type 3 digital inputs or 5mm x 5mm TQFN Package four Type 2 digital inputs. The device provides diagnostic Reduced Power and Heat Dissipation functions, including thermal shutdown, 24V under volt- 0.6mA (typ) Supply Current age alarm, 24V missing voltage alarm, and SPI and CRC 11% Accurate Input-Current Limiters communication error detection. All of the faults can be Energyless Field-Side LED Drivers configured to generate an interrupt using the FAULT pin. Low Power Dissipation with Negative Input Voltage For robust operation in industrial environments, each Fault Tolerant input includes a programmable glitch filter. Noise filters on Input Protection to 40V each channel can be independently programmed to one Integrated Field-Supply Voltage Monitors of eight values between 50s and 20ms or filter bypass. 5-Bit CRC SPI Error Detection The MAX22199 has a 4-pin SPI interface and, in addition, Configurability Enables Wide Range of Applications uses the LATCH input for synchronizing input data sam- Configurable Input Current from 0.5mA to 3.4mA pling across multiple devices. Selectable Input Debounce Filtering Current Sources Can Be Disabled The MAX22199 field-side accepts a single 7V to 65V Supports Daisy-Chain SPI and Direct SPI supply to the V pin. When powered by the field DD24 Robust Design supply, the MAX22199 generates a 3.3V output from an integrated LDO regulator, which can provide up to 25mA 8kV Contact ESD and 15kV Air-Gap ESD Using of current for external loads in addition to powering the Minimum 1k Resistor MAX22199. Alternatively, the MAX22199 can be powered 2kV Surge Tolerant Using Minimum 1k Resistor from a 3.0V to 5.5V logic side supply connected to the -40C to +125C Ambient Operating Temperature V pin. For flexibility, the SPI interface operates at 3.3V Advanced Diagnostics Can Be Provided by MAX22190 DD or 5V logic levels as controlled by the V pin. Pin-to-Pin Compatible L Register Compatible Applications Programmable Logic Controllers Distributed Control System Ordering Information appears at end of data sheet. Motor Control Building Automation 19-101135 Rev 0 5/21MAX22199 Octal Industrial Digital Input Isolated Octal Type 1/3 Digital Input 24V 3.3V 2.5V 33V 1F 0.1F 0.1F 1F 0.1F 1F V VDDA DDB VDD24 VDD VL VDD 7.5k 4.7k REFDI SBA 4.7k I.C. 4.7k READY IRDY SAA GPI FIN1 1.5k IN1 FAULT IFAULT OFAULT GPI/INT LED1 LATCH OAUX IAUX GPO SDI OSDI ISDI MICRO FIN2 1.5k MAX22199 MAX14483 SDI IN2 CONTROLLER SCLK OSCLK ISCLK SCLK LED2 CS OCS ICS CS SDO ISDO OSDO SDO M1 2.5V FIN8 1.5k IN8 M0 SDOEN LED8 GNDA GNDB GND GND Maxim Integrated 2 www.maximintegrated.com FIELD SIDE LOGIC SIDE