This New Product Brief (NPB) is part of a video series highlighting the features, applications, and technical specs of newly-released products.

Maxim Integrated MAX22191 Digital Isolator

Maxim Integrated’s MAX22191 translates a 24V digital industrial input to a 2.4mA current to drive an optical isolator.  The device complies with IEC61131-2, with voltage threshold and current levels compliant with Type 1 and Type 3 inputs. The MAX22191 offers a fast 250ns response time and can be used in a variety of circuit designs, including as a current sourcing or current sinking input with optical isolators, or as a current sinking input with logic devices.  The robust design operates at temperatures up to 125°C and tolerates ±60V input signals. The MAX22191 is parasitically powered from the input to simplify design, and the input is current-limited to reduce power and heat dissipation.

  • IEC 61131-2 compliant, industrial digital input device
  • Compliant with Type 1 and Type 3 inputs, and with 48V inputs with external resistors
  • Fast response time: 250ns max
  • Operating Temperature: -40°C to +125°C ambient
  • Robust ±60V input range
  • Current-limited input reduces power and heat dissipation

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