High-Side Switch with Settable Current-Limiting, Push-Pull Driver Option, and Digital Input Configuration

The MAX14914, MAX14914A, and MAX14914B are a family of high-side/push-pull drivers that operate as both industrial digital outputs (DO) and industrial digital inputs (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 an ambient temperature of 125°C. Optional push-pull operation allows driving of cables and fast discharge of load capacitance. The output voltage is monitored and indicated through the DOILVL 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 the MAX14914, specifically designed to work together with the MAX22000 Industrial Configurable Analog IO device. The MAX14914B features a high-side switch overcurrent indication.

Applications

* Configurable Digital Input/Output

* Industrial Digital Output and Input Modules

* Motor Control

* Safety Systems

* 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

* SafeDemag™ 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