Video mux amp with the speed to match
The Maxim Integrated MAX4311ESD+ is a 4:1 multiplexer-amplifier that combines a high-speed analog mux with a rail-to-rail output buffer in a single 14-SOIC package. It's built for applications that need to switch between multiple video or high-speed signal sources and drive a 50-ohm or 75-ohm back-terminated line without an extra gain stage. The -3dB bandwidth of 345 MHz and a 430V/µs slew rate mean it can pass component video, high-resolution graphics, or fast pulse trains with minimal slew-induced distortion — the 0.1 dB flatness typically holds well past 100 MHz for composite video work.
Supply voltage range — single or split rails
The part runs from a single 4V to 10.5V supply or split ±2V to ±5.25V rails. That flexibility matters when you're retrofitting into an existing ±5V analog backplane or moving to a single 5V or 8V rail in a newer design. The 6.9 mA supply current (typical) is fixed regardless of the rail choice — no scaling with voltage — so budget the full quiescent draw at the highest supply.
Output drive and package reality
Each of the four input channels routes through a single amplifier that can deliver 95 mA per channel. That's enough to drive a standard video load (150-ohm back-terminated) with headroom. The 14-SOIC package (3.90 mm width) is a common footprint for analog muxes and video amps, and the surface-mount body means it flows through the same reflow profile as the rest of a mixed-signal board. No special handling beyond standard MSL precautions.