HA457
95MHz, Low Power, AV = 2, 8 x 8 Video Crosspoint Switch
Typical Diagram
Key Features
- Pin Compatible, Cable Driving Upgrade for HA456 and MAX456
- Fully Buffered Inputs and Outputs (AV = +2)
- Routes Any Input Channel to Any Output Channel
- Switches Standard and High Resolution Video Signals
- Serial or Parallel Digital Interface
- Expandable for Larger Switch Matrices
- Wide Bandwidth 95MHz
- High Slew Rate 275V/µs
- Low Crosstalk at 10MHz -55dB
Description
The HA457 is an 8 x 8 video crosspoint switch suitable for high performance video systems. Its high level of integration significantly reduces component count, board space, and cost. The crosspoint switch contains a digitally controlled matrix of 64 fully buffered switches that connect eight video input signals to any, or all, matrix outputs. Each matrix output connects to an internal, high-speed (275V/µs), gain of two buffer capable of driving 150Ω to ±2.5V.
The HA457 will directly drive a double terminated video cable with some degradation of differential gain and phase. Applications demanding the best composite video performance should drive the cable with a unity gain video buffer, such as the HFA1412 quad buffer (see Figure 7). This crosspoint's three-state output capability makes it feasible to parallel multiple HA457s and form larger switch matrices.
Applications
- Video Switching and Routing
- Security and Video Editing Systems
