High-Speed, Quad, Industrial Digital Input with Parallel Output

The MAX22193 translates four 24V industrial digital inputs to four CMOS-logic-compatible, parallel outputs. Propagation delay from input-to-output is less than 300ns for all four channels. Current-limiter on each digital input greatly reduces power dissipation compared to traditional resistive input. The accuracy of these current-limiters minimizes power dissipation while ensures compliance with the IEC 61131-2 standard. A current-setting resistor allows the MAX22193 to be configured for Type 1, Type 2 or Type 3 digital inputs. Additionally, the MAX22193 has energyless field-side LED drivers to meet the indicator light requirement of IEC 61131-2 with no additional power dissipation.

The MAX22193 provides a 3.3V integrated voltage regulator. The internal LDO accepts the field supply VDD24 from 7V to 65V. The internal LDO output can supply up to 25mA of current in addition to powering the basic MAX22193 requirements. This LDO can be used to power digital isolators and other field-side circuits. Alternatively, the MAX22193 can be powered from an external 3.0V to 5.5V supply at VDD3.

The MAX22193 includes an open-drain READY output that asserts high to indicate the MAX22193 is functional. If the VDD24 field-side supply voltage is too low, or a fault in the current-setting resistor is detected, or the device reaches an over-temperature condition, the READY signal is set to high-impedance.

Applications

* Programmable Logic Controllers (PLC)

* Distributed Control System (DCS)

* Motor Control

* Industrial Automation

* Process Automation

* High-Speed, Industrial Digital Inputs

* 300ns Maximum Propagation Delay

* 40ns Maximum Channel-to-Channel Skew

* Parallel Output for Simultaneous Signal Delivery

* High Integration Reduces BOM and Space

* Operates Directly from Field Supply (7V to 65V)

* Compatible with 3.3V or 5V Logic

* 4mm x 4mm, 20-TQFN Package

* Low Power and Low Heat Dissipation

* 1.2mA (max) Quiescent Current with 3.3V Supply

* Accurate Input Current-Limiters

* Energyless Field-Side LED Drivers