EVALUATION KIT AVAILABLE Click here to ask about production status of specific part numbers. MAX22192 Octal Industrial Digital Input with Diagnostics and Digital Isolation General Description Benefits and Features The MAX22192 is an IEC 61131-2 compliant industrial High Integration Reduces BOM Count and Board Space digital input device with integrated digital isolation. The Eight Input Channels with Serializer MAX22192 translates eight, 24V current-sinking, indus- Integrated Isolation of 600V for 60s (V ) RMS ISO trial inputs to an isolated serialized SPI-compatible output Operates Directly from Field Supply (7V to 65V) that interfaces with 1.71V to 5.5V logic voltage. A current- Compatible with 1.8V, 3.3V or 5V Logic setting resistor allows the MAX22192 to be configured for 6mm x 10mm GQFN Package Type 1, Type 2, or Type 3 inputs. For proximity switches, Reduced Power and Heat Dissipation the field-wiring is verified using the wire break feature. Accurate Input-Current Limiters When wire break is enabled, the LFAULT output is assert- Energyless Field-Side LED Drivers ed and a register flag set if the input current drops below the wire break threshold for more than 20ms. Additional Fault Tolerant with Built-In Diagnostics diagnostics that assert LFAULT include: overtemperature Input Protection to 40V with Low-Input Leakage protection, low 24V field supply, 24V field supply missing, Current and CRC communication error. Wire-Break Detection Integrated Field-Supply Voltage Monitors For robust operation in industrial environments, each input Integrated Overtemperature Monitors includes a programmable glitch filter. The filter delay on 5-Bit CRC Code Generation for Error Detection each channel can be independently programmed to one of eight values between 50s and 20ms, or filter bypass. Configurability Enables a Wide Range of Applications Configurable IEC 61131-2 Type 1, 2, 3 Inputs The MAX22192 has an isolated 4-pin SPI interface, and Configurable Input Current-Limiting from 0.5mA to in addition uses isolated LLATCH input for synchronizing input data across multiple devices in parallel, and iso- 3.4mA lated LFAULT output for instantly alerting the host of any Selectable Input Glitch Filter diagnostic issues. The digital signals with a name starting Capable of Daisy-Chaining Other Field-Side De- with L are logic-side signals, and the digital signals with a vices Sharing Isolated SPI name starting with F are field-side signals. Robust Design The MAX22192 field-side accepts a single 7V to 65V sup- 8kV Contact ESD and 15kV Air-Gap ESD Using ply to the V pin. When powered by the field supply, DD24F Minimum 1k Resistor the MAX22192 generates a 3.3V output on the V pin DD3F 1kV Surge Tolerant Using Minimum 1k Resistor from an integrated LDO regulator, which can provide up to -40C to +125C Ambient Operating Temperature 25mA of current for external loads in addition to powering Applications the MAX22192. Alternatively, the MAX22192 can be pow- ered from a 3.0V to 5.5V supply connected to the V Programmable Logic Controllers DD3F pin. The logic-side of the MAX22192 is powered from a Industrial Automation single 1.71V to 5.5V supply to the V pin to interface Process Automation DDL with 1.8V, 3.3V, or 5V logic levels. Safety Regulatory Approvals The MAX22192 has an isolation rating of 600V for 60 RMS UL According to UL1577 seconds and is available in a 70-pin GQFN package with cUL According to CSA Bulletin 5A 2.3mm clearance and creepage. The package material has a minimum comparative tracking index (CTI) of 600V, which gives it a group I rating in creepage tables. Ordering Information and Typical Operating Circuits appear at end of data sheet. 19-100406 Rev 3 9/20MAX22192 Octal Industrial Digital Input with Diagnostics and Digital Isolation Isolated Octal Type 1/3 Digital Input 24V 3.3V 1.8V 1F 0.1F 0.1F 1F 0.1F 1F V V V M1 M0 VDDL DD24F DD3F LF 7.5k REFDI 24k VDD REFWB EXTVM AFS GPI 1.5k FIELD INPUT IN1 LCS CS LED1 LSCLK SCLK 1.5k MAX22192 LSDI MOSI MICRO FIELD INPUT IN2 CONTROLLER LSDO MISO LED2 LLATCH GPO 1.8V INPUT AT PIN 1.5k 4.7k FIELD INPUT IN8 SDOEN LED8 LFAULT GPI or INT 470 LEDC2 GND 470 LEDC1 470 24VM LEDC0 LEDR2 LEDR1 LEDR0 FCS FSCLK FSDO FSDI OSDI FFAULT IFAULT OREADY IREADY FLATCH GNDF GNDL 4.7k 4.7k 3.3V Maxim Integrated 2 www.maximintegrated.com FIELD SIDE LOGIC SIDE