EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX22190 Octal Industrial Digital Input with Diagnostics General Description Benefits and Features The MAX22190 is an IEC 61131-2 compliant industrial High Integration Reduces BOM Count and Board Space digital input device. The MAX22190 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. A Compatible with 3.3V or 5V Logic current setting resistor allows the MAX22190 to be 5mm x 5mm TQFN Package configured for Type 1, Type 2, or Type 3 inputs. Field Reduced Power and Heat Dissipation wiring is verified for proximity switches, by a second Accurate Input-Current Limiters threshold detector on each input. When wire-break is Energyless Field-Side LED Drivers enabled, the FAULT output is asserted and a register Fault Tolerant with Built-In Diagnostics flag is set if the input current drops below the wire-break Input Protection to 40V with Low-Input Leakage threshold for more than 20ms. Additional diagnostics that Current assert the FAULT pin include: overtemperature, low 24V Wire Break Detection field supply, 24V field supply missing, CRC communica - Integrated Field-Supply Voltage Monitors tion error, etc. Integrated Overtemperature Monitors For robust operation in industrial environments, each input 5-Bit CRC Code Generation and Transmission for includes a programmable glitch filter. The filter delay on each Error Detection channel can be independently programmed to one of eight Configurability Enables Wide Range of Applications values between 50s and 20ms, or filter bypass. Configurable IEC 61131-2 Type 1, 2, 3 Inputs The MAX22190 has a 4-pin SPI interface and in addition Configurable Input Current-Limiting from 0.5mA to uses the LATCH input for synchronizing input data across 3.4mA multiple devices in parallel. Selectable Input Debounce Filtering Robust Design MAX22190 field-side accepts a single 7V to 65V 8kV Contact ESD and 15kV Air Gap ESD Using supply to V pin. When powered by the field supply, DD24 Minimum 1k Resistor the MAX22190 generates a 3.3V output from an integrated LDO regulator, which can provide up to 25mA of current 1kV Surge Tolerant Using Minimum 1k Resistor for external loads in addition to powering the MAX22190. -40C to +125C Ambient Operating Temperature Alternatively, the MAX22190 can be powered from a 3.0V to 5.5V logic side supply connected to V pin. For flexibil- DD ity, the SPI interface operates at 3.3V or 5V logic levels as controlled by the V pin. L Ordering Information appears at end of data sheet. Applications Programmable Logic Controllers Industrial Automation Process Automation Building Automation 19-100224 Rev 5 9/20MAX22190 Octal Industrial Digital Input with Diagnostics Isolated Octal Type 1/3 Digital Input 24V 3.3V 2.5V 0.1F 1F 1F 0.1F 0.1F 1F V V DDA DDB V DD V V V DD24 DD L 7.5k REFDI 4.7k SBA SAA 24k GPI REFWB READY IRDY 1.5k LATCH OAUX IAUX GPO IN1 OSDI SDI ISDI SDI LED1 SCLK ISCLK OSCLK MICRO SCLK 1.5k MAX22190 MAX14483 IN2 CONTROLLER CS OCS ICS CS LED2 SDO ISDO OSDO SDO M1 2.5V M0 4.7k INF (INPUT-FIELD) INP (INPUT-PIN) 1.5k 3.3V SDOEN IN8 4.7k IFAULT OFAULT LED8 GPI or INT GNDA GNDB GND FAULT GND Maxim Integrated 2 www.maximintegrated.com FIELD SIDE LOGIC SIDE