MAX4885ETJ+T

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1. Description

The MAX4885ETJ+T integrates high-bandwidth analog switches and level-translating buffers to implement a complete 1:2 or 2:1 multiplexer for VGA signals. The device provides switching for RGB, display data channel (DDC), and horizontal and vertical synchronization (HSYNC, VSYNC) signals. A low-noise charge pump with internal capacitors provides a boosted gate-drive voltage to improve performance of the RGB switches. In the 1:2 multiplexer mode, HSYNC/VSYNC inputs feature level-shifting buffers to support low-voltage CMOS or standard TTL-compatible graphics controllers. In the 2:1 multiplexer mode, the output buffers for the HSYNC/VSYNC inputs are disabled, allowing bidirectional signaling. In both modes, DDC signals are voltage-clamped to an external voltage to provide level translation and protection. The MAX4885ETJ+T features a 5µA shutdown mode and is ESD protected to ±8kV Human Body Model (HBM) on externally routed pins. The MAX4885ETJ+T is specified over the extended (-40°C to +85°C) temperature range, and is available in the 32- pin, 5mm x 5mm TQFN package.

2. Features

    1. +5V Single-Supply Operation

    2. Programmable Voltage Clamp for Open-Drain DDC Signals

    3. Low 5Ω (typ) On-Resistance (R, G, B Signals)

    4. Low 13pF (typ) On-Capacitance (R, G, B Signals)

    5. Break-Before-Make Switching Protects Against Circuit Shorts

    6. ±8kV HBM ESD Protection on Externally Routed Pins

    7. Low 300µA Supply Current (Lower than 1µA with Charge Pump Disabled)

    8. Space-Saving, Lead-Free, 32-Pin (5mm x 5mm) TQFN Package

3. Applications

    1. Notebook Computers

    2. Digital Projectors

    3. Computer Monitors

    4. Servers

    5. KVM Switches

4. Pin Configuration