MAX14983E Enhanced 1:2 VGA Mux with Monitor Detection and Priority Port Logic

Product Details

The MAX14983E integrates high-bandwidth analog switches, level-translating buffers, and 5V power switches to implement a complete 1:2 multiplexer for VGA monitors. The device switches graphics signals between a controller and two outputs. Integrated pullup resistors (2.2kΩ typ) are provided on the monitor-side display data channel (DDC) signal lines.

The device features a simple power interface that operates with a single +5V supply input. Two integrated power switches with current limiting and reverse-current protection pass the +5V supply to external loads with minimal voltage drop.

The horizontal and vertical synchronization (HSYNC/VSYNC) buffers shift logic levels to support +2.5V to +5.0V CMOS or TTL-compatible graphics controllers while meeting the VESA drive capability requirement of ±8mA. An internal 2.5V regulator translates the DDC voltage levels to be compatible with low-voltage graphics controllers.

The device also features monitor-detect outputs and enable inputs that allow monitor switching to operate either automatically or with inputs from the graphics controller. The MAX14983E is available in a 32-pin (5mm x 5mm) TQFN package, and is specified over the -40°C to +85°C extended temperature range.

Applications

• Computing
• Graphics Cards
• KVM Switches
• Servers

Features and Benefits

• Design Flexibility
  • Graphics Controller Port is Protected when V_CC = 0V
  • DDC Switches Limit Voltage to Low-Voltage Supply
  • Internal +2.5V Regulator
• High Level of Integration for Enhanced Performance
  • Low 5.5pF (typ) RGB Capacitance
  • 2.0ns (typ) t_R/t_F with 10pF, 2.2kΩ Load on Monitor-Side SYNC Signals
  • Source and Sink 8mA While Meeting Speed Requirements
  • ±11kV Human Body Model (HBM)
• Saves Space on Board
  • Internal Power Switches
    • Pass +5V with 300mV (max) IR Drop
    • Short-Circuit/Thermal/Reverse-Current Protection
  • 5mm x 5mm, 32-Pin TQFN Package