Overview

General Description

The MAX14914, MAX14914A and MAX14914B are the family of high-side/push-pull drivers that operate as both an industrial digital output (DO) and an industrial digital input (DI). The MAX14914 family features full IEC 61131-2 compliance in both their DO and DI modes of operation. The high-side switch current is resistor settable from 135mA (min) to 1.3A (min). The high-side driver’s on-resistance is 120mΩ (typ) at 125°C ambient temperature. Optional push-pull operation allows driving of cables and fast discharge of load capacitance. The output voltage is monitored and indicated through the DOI_LVL pin for safety applications.

The MAX14914 family complies with Type 1, Type 2, or Type 3 input characteristics when configured for DI operation.

The MAX14914A is a low-DOI-leakage version of MAX14914, designed to work together with the MAX22000 Industrial Configurable Analog IO device. The MAX14914B features a high-side switch overcurrent indication.
Block Diagram of MAX14914 and MAX14914A
Benefits and Features
  • Reduces Power and Heat Dissipation
    • 240mΩ (max) HS RON at TA = 125°C
    • 0.9mA (typ) High-Side DO-Mode Supply Current
    • Accurate Internal Current Limiter for Type 1, Type 2, and Type 3 Digital Inputs
  • Enhances System Robustness
    • ​SafeDemagTM for Safe Turn-Off of Unlimited Inductance
    • 60V Supply Tolerance
    • Accurate Short-Circuit DO Mode Current Limiting
    • ±2kV IEC 61000-4-5 Surge Protection
    • ±20kV IEC 61000-4-2 Air-Gap ESD Protection
    • ±7kV IEC 61000-4-2 Contact ESD Protection
    • -40°C to +125°C Ambient Operating Temperature
  • Reduces BOM Count and PCB Space
    • ​Small 4mm x 4mm TQFN Package
    • Internal Clamp for Fast Inductive Load Turn-Off
    • On-Chip 5V Regulator
  • Provides Flexibility
    • Configurable as a Digital Input, or a High-Side or Push-Pull Digital Output
    • Low-Leakage Mode (MAX14914A) Allows High Accuracy AIO/DIO applications
    • Resistor Settable Current Limiting for the High-Side Switch (135mA to 1.3A)
    • Pin-Selectable Type 1/3 or Type 2 DI Operation
  • Improves System Speed and Throughput
    • ​Propagation Delay of Less Than 2μs
Applications
  • Industrial Digital Outputs and Inputs Modules
  • Configurable Digital Input/Output
  • Motor Control
  • Safety Systems


SafeDemag is a trademark of Maxim Integrated Products, Inc.


19-8712; Rev 4; 9/20