The MAX4356 is a 16 ✕ 16 highly integrated video crosspoint switch matrix with input and output buffers and On-Screen Display (OSD) Insertion. This device operates from dual ±3V to ±5V supplies or from a sin- gle +5V supply. Digital logic is supplied from an inde- pendent single +2.7V to +5.5V supply. Individual outputs can be switched between an input video signal source and OSD information through an internal, dedi- cated fast 2:1 mux (40ns switching times) located before the output buffer. All inputs and outputs are buffered, with all outputs able to drive standard 75Ω reverse-terminated video loads. The switch matrix configuration and output buffer gain are programmed via an SPI/QSPI™-compatible, three- wire serial interface and initialized with a single update signal. The unique serial interface operates in two modes facilitating both fast updates and initialization. On power-up, all outputs are initialized in the disabled state to avoid output conflicts in large-array configura- tions. Superior flexibility, high integration, and space-saving packaging make this nonblocking switch matrix ideal for routing video signals in security and video-on- demand systems. The MAX4356 is available in a 128-pin TQFP package and specified over an extended -40°C to 85°C temper- ature range.
The MAX4356 is a nonblocking video crosspoint switch matrix featuring buffered inputs and outputs, as well as On-Screen Display (OSD) insertion capabilities. It supports operation from dual +3V to +5V supplies or a single +5V supply, with digital logic powered by an independent +2.7V to +5.5V source.
The device includes a unique SPI/QSPI-compatible three-wire serial interface for programming the switch matrix configuration and output buffer gain. Individual outputs can be switched between input video signals and OSD information via an internal fast 2:1 mux with 40ns switching times, allowing all outputs to drive standard 75Ω reverse-terminated video loads.
| Switch Matrix Configuration | 16 x 16 Nonblocking Matrix |
|---|---|
| Operating Supply Voltage (Analog) | +3V to +5V (Dual) or Single +5V |
| Digital Logic Supply Voltage | +2.7V to +5.5V |
| Switching Time (OSD Insertion) | 40ns |
| Output Buffer Gain Options | +1V/V or +2V/V |
| Crosstalk at 6MHz | -62dB |
| Power Consumption (Typical) | 195mW |
| Package Type | 128-pin TQFP |
It is ideal for routing video signals in security and video-on-demand systems.
It uses an SPI/QSPI-compatible, three-wire serial interface.
The device is specified over an extended -40°C to +85°C temperature range.