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

Industry's Smallest, Robust, Octal Digital Input with Parallel Output

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The MAX22195 translates eight 24V industrial digital inputs to eight CMOS-compatible, parallel outputs. Propagation delay from input-to-output is less than 300ns for all channels. Current-limiters on each digital input greatly reduce power dissipation compared to traditional resistive inputs. The accuracy of these current-limiters minimizes power dissipation while ensuring compliance with the IEC 61131-2 standard. A current-setting resistor allows the MAX22195 to be configured for Type 1, Type 2, or Type 3 inputs. Additionally, the MAX22195 has energyless field-side LED drivers to meet the indicator light requirement of IEC 61131-2 with no additional power dissipation.

The MAX22195 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 MAX22195 requirements. This MAX22195 LDO current can be used to power digital isolators and other field-side circuits. Alternatively, the MAX22195 can be powered from a 3.0V to 5.5V supply connected to VDD3 pin.

The MAX22195 includes an open-drain READY output that asserts high to indicate the MAX22195 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.
MAX22195: Functional/Block Diagram MAX22195: Functional/Block Diagram Enlarge+

Key Features

  • High-Speed, Industrial Digital Inputs
    • 300ns Maximum Propagation Delay
    • ±10ns Maximum Channel-to-Channel Skew
    • Parallel Output for Simultaneous Signal Delivery
  • High Integration Reduces BOM Count and Board Space
    • Operates Directly from Field Supply (7V to 65V)
    • Compatible with 3.3V or 5V Logic
    • 5mm x 5mm, 32-TQFN Package
  • Low Power and Low Heat Dissipation
    • Low Quiescent Current (1.2mA Maximum)
    • Accurate Input Current-Limiters
    • Energyless Field-Side LED Drivers
  • Fault Tolerant with Built-In Diagnostics
    • Integrated Field-Side Supply Monitor
    • Integrated Overtemperature Monitor
    • Current-Setting Resistor Monitor
  • Configurability Enables Wide Range of Applications
    • Configurable IEC 61131-2 Types 1, 2, 3 Inputs
    • Configurable Input Current Limiting from 0.56mA to 3.97mA
  • Robust Design
    • ±1kV Surge Tolerant using Minimum 1kΩ Resistor
    • ±8kV Contact ESD and ±15kV Air Gap ESD Using Minimum 1kΩ Resistor
    • -40°C to +125°C Ambient Operating Temperature
Part NumberDigital Input/OutputµC Interface TypeChannelsVSUPPLY
Digital Input TypeCurrent Limit
Current Limit
Min. Detectable Field Input Pulse Width
FeaturesOper. Temp.
MAX22195 Digital InputParallel87650.6
Type 1
Type 2
Type 3
2.12.63Accurate Current Limiter-40 to +125
See All Digital I/O (12)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX22195EVKIT: Evaluation Kit for the MAX22195

Technical Documents

App Note 6635 FAQ: The MAX22190 Octal Industrial Digital Input Device with Diagnostics

Quality and Environmental Data

Request Reliability Report for: MAX22195 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • MAX22195 IBIS Model
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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