Overview

Features and Benefits

  • Per-Channel Configurability Enables Wide Range of Applications 
    • Digital Output: High-Side (HS) Switch or Push-Pull (PP) Driver
    • Digital Input: Software Selectable Type 1 and 3, or Type 2
    • Current Limit Settable from 130mA to 1.2A
    • Serial (SPI) or Direct Operation Using Pins
    • Independent Channel Powering
  • Fault Tolerant with Built-In Diagnostics
    • Per-Channel Diagnostics
    • Integrated Voltage Supply Monitoring and Short-to-VDD Detection
    • Open-Wire/Open-Load Detection 
    • Thermal Shutdown Protection
    • Watchdog Timer
    • 5-Bit CRC Code Generation and Checking for SPI Error Detection
  • High Integration Reduces BOM Count and PCB Space 
    • Integrated LDO Compatible with 5V Logic Devices
    • Internal Active Clamps for Fast Inductive Load Turn-Off 
    • 0.6μs (typ) DO and 1μs (typ) DI Propagation Delays
    • Addressable SPI
    • 7mm x 7mm TQFN Package
  • Reduced Power and Heat Dissipation
    • Low RDSON for High-Side Switches, 120mΩ (typ)
    • Accurate Output Current Limiting
    • Accurate Input Current Sinks, Type 1 and 3, or Type 2
  • Robust Design
    • 10V to 40V Operating Supply Range, 65V Tolerant
    • SafeDemagTM Allows Fast Turn-Off of Unlimited Inductance
    • ±16kV Air-Gap ESD and ±8kV Contact ESD
    • ±1kV Surge Tolerant Using TVS Protection on VDD to GND
    • -40°C to +125°C Operating Temperature

Product Details

The MAX14906 is an IEC 61131-2 compliant, high-speed, four-channel industrial digital output, digital input device that can be configured on a per-channel basis as a high-side (HS) switch, push-pull (PP) driver, or a Type 1 and 3, or Type 2 digital input. The MAX14906 is specified for operation with a supply voltage up to 40V and is tolerant to 65V.

The high-side switch current limiting is settable from 130mA to 1.2A with the option of 2x load inrush current. The high-side driver on-resistance is 120mΩ (typ) at 25°C ambient temperature. Optional push-pull operation allows high speed driving of cables and fast discharge of load capacitance. For digital input operation, current sinks for 2.3mA (Type 1 and 3) or 7mA (Type 2) are provided.

The SPI interface has a built-in chip addressing decoder, allowing communication with multiple MAX14906 devices utilizing a shared SPI with a common chip select active-low CS. The SPI interface provides flexibility for global and per-channel configuration and diagnostics, including supply overvoltage and undervoltage detection, wire-break or open-wire detection, thermal overload and current limit reporting, and more. For high-speed operation, the digital input and output states can be monitored and changed directly using pins for increased system speed and throughput.

Open-wire detection monitors open-wire/open-load conditions with switches in the off state. LED drivers provide indication of per-channel fault, status, and supply undervoltage conditions. Internal active clamps allow for fast turn-off of inductive loads. Integrated line-to-ground and line-to-line surge protection only requires a TVS on VDD.

The MAX14906 is available in a compact 48-pin 7mm x 7mm QFN package.

Applications

  • Industrial Digital Output and Input Module
  • Configurable Digital Input/Output
  • Motor Control
  • PLC Systems
  • Distributed Control Systems (DCS)

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (2)

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.