Industrial Digital I/O Interface ICs

High-voltage industrial digital input (DI) and digital output (DO) signals (also called binary signals), typically range in magnitude from 0 to 24V. Digital I/O signals are used by industrial automation and control equipment, operating in harsh and noisy environments, to communicate on/off status between remote devices and controllers.

Our industrial digital I/O ICs perform voltage level translation while providing circuit protection. Many also perform data serialization to allow economical operation through digital signal isolators.

Key Benefits:

  • Most robust solutions on the market with the highest integration.
  • Fast time-to-market with the best support in the industry.

Design Solution Digital I/O Ebrief

Digital I/O Parametric Search 

Digital Input ICs

Industrial digital input (DI) ICs interface between high-voltage signals from sensors on the factory floor and the lower voltages found in automation and control equipment such as industrial controllers. Our IEC61131-2-compliant digital input interface devices offer the smallest solution size, lowest power dissipation, and most robust operation with 1kV of surge protection and integrated diagnostics. Our parasitically powered digital input IC reduces power dissipation by up to 60 percent and does not require a discrete isolated power supply.

See All Digital Inputs 

Digital Output ICs

Industrial digital output (DO) ICs are used for high-speed switching of high-voltage output signals in industrial automation and control applications. Our digital output drivers have very low on-resistance (reducing power dissipation and allowing increased channel density), integrated surge protection, diagnostics, and allow safe demagnetization of inductive loads.

See All Digital Outputs  

Configurable Digital Input/Output ICs

Digital I/O devices allow a controller to configure a channel electronically as either a digital input or digital output, without the need to change hardware, thereby removing the limitation on the available card types. This provides greater design flexibility and reduces the costs associated with changes that may be required during project commissioning. Our DIO products are fully IEC compliant, software-configurable and include the patented SafeDemag technology, which allows for quick and safe demagnetization of any size inductive load.

See All Digital Input/Outputs 

Industrial Digital IO Evaluation Boards and Peripheral Modules

Peripheral module boards (PMBs) provide an easy way to evaluate our digital IO devices.

PMB Key Features

  • Powered from a Single 3.0V to 5.5V Logic Supply, Without the Need for a 24V Field Supply
  • Configured for IEC 61131-2 Type 1 and Type 3 Sensor Inputs
  • Proven PCB Layout
  • Works with USB2PMB2# or USB2GPIO# Adapter and Munich GUI Software

Industrial Digital I/O Interface Product Selector Table

Device Type Device Evaluated Device Description Evaluation Kit Peripheral Module Board
Digital Input MAX22190 8-Channel Industrial Digital Input with Diagnostics MAX22190EVKIT MAX22190PMB
Digital Input MAX22191 Single-Channel Parasitically Powered Digital Input MAX22191EVKIT MAX22191PMB
Digital Input MAX22192 Octal Industrial Digital Input with Diagnostics and Digital Isolation MAX22192EVKIT  
Digital Input MAX22195 High-Speed, Octal, Industrial Digital Input with Parallel Output MAX22195EVKIT  
Digital Output MAX14912 8-Channel High-Speed, Digital Output Driver MAX14912EVKIT MAX14912PMB
Digital IO MAX14914 Single-Channel Driver, Configurable as DI or DO


Digital IO MAX14906 Quad-Channel Driver, Configurable as DI or DO


Digital Output MAX14915

8-Channel Industrial Digital Outputs with Diagnostics

Digital Output MAX14916 8-Channel 1A/4-Channel 2A Industrial Digital Outputs with Diagnostics MAX14916EVKIT  
Companion Board Device Evaluated Description Board Number
Adapter Board - Low-cost, easy-to-use USB-to-I2C/SPI/GPIO interface adapter board USB2GPIO
Isolation Board MAX14483 Provide isolation between the USB adapter board and any peripheral module board USB2GPIOISO

Industrial Digital I/O Interface Featured Products

Evaluation Kit for Octal Digital Output with SafeDemag


Octal HS or push-pull, SafeDemag surge protection with integrated diagnostics and LED matrix.

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Evaluation Kit for Single-Channel Configurable DIO IC


The only fully software-configurable DIO push-pull, fast, and surge protection product with SafeDemag.

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Evaluation Kit for Octal Digital Input for Type 1, 3, and 2 Inputs


Fully IEC61131-2-compliant octal digital input with wire-break detection, integrated diagnostics, and LED matrix.

Learn more ›

Industrial Digital I/O Interface Design Resources

Application Notes

Customer Testimonials

Design Solution HollySys

Design Solution Radio Bridge