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General Description

The MAX4357 is a 32 ? 16 highly integrated video crosspoint switch matrix with input and output buffers. This device operates from dual ±3V to ±5V supplies or from a single +5V supply. Digital logic is supplied from an independent single +2.7V to +5.5V supply. 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 through an SPI?/QSPI?-compatible, 3-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 configurations.

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 MAX4357 is available in a 128-pin TQFP package and specified over an extended -40°C to +85°C temperature range.

Features

? 32 ? 16 Nonblocking Matrix with Buffered Inputs and Outputs

? Operates from ±3V, ±5V, or +5V Supplies

? Each Output Individually Addressable

? Individually Programmable Output Buffer Gain

?? (AV = +1V/V or +2V/V)

? High-Impedance Output Disable for Wired-OR Connections

? 0.1dB Gain Flatness to 12MHz

? Minimum -62dB Crosstalk, -110dB Isolation at 6MHz

? 0.05/0.1° Differential Gain/Differential Phase Error

? Low 220mW Power Consumption (0.43mW per point)

Applications

?? Security Systems

?? Video Routing

?? Video-On-Demand Systems