High-Bandwidth, VGA 2:1 Switch with ±15kV ESD Protection

The MAX4885AE integrates high-bandwidth analog switches, level-translating buffers, and level-translating FET switches to implement a complete 2:1 multiplexer for VGA signals. The device provides three very high-frequency 900MHz (typ) SPDT switches for RGB signals, two low-frequency clamping switches for the DDC signals, a pair of level-translating buffers for the H and V signals and integrated extended ESD protection.

Horizontal and vertical synchronization (H/V) inputs feature level-shifting buffers to support low-voltage controllers and standard 5V-TTL-compatible monitors, meeting the VESA requirement. Display Data Channel (DDC), consisting of SDA and SCL, are FET switches that protect the low-voltage VGA source from potential damage from high-voltage presence on the monitor while reducing capacitive load.

All seven output terminals of the MAX4885AE feature high-ESD protection to ±15kV Human Body Model (HBM) (see the Pin Description in the full data sheet). All other pins are protected to ±2kV Human Body Model (HBM).

The MAX4885AE is specified over the extended -40°C to +85°C temperature range, and is available in a space-saving, 28-pin, 4mm × 4mm TQFN package.

Applications

* KVM for Servers * Notebook Computers—MXM/Switchable Graphics

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

* Low 5.5pF (typ) On-Capacitance (R, G, B Signals)

* Independent, Selectable Logic Inputs for Switching

* Similar Pin Configuration to MAX4885

* Ultra-Small, 28-Pin (4mm x 4mm) TQFN Package

* ±15kV ESD Human Body Model (HBM)