描述 Description

The MAX456 is the first monolithic CMOS 8 x 8 video crosspoint switch that significantly reduces component count, board space, and cost. The crosspoint switch contains a digitally controlled matrix of 64 T-switches that connect eight video input signals to any, or all, output channels. Each matrix output connects to eight internal, high-speed (250V/μs), unity-gain-stable buffers capable of driving 400Ω and 20pF to ±1.3V. For applications requiring increased drive capability, the MAX456 outputs can be connected directly to two MAX470 quad, gain-of-two video buffers, which are capable of driving 75Ω loads.
Three-state output capability and internal, programmable active loads make it feasible to parallel multiple MAX456s and form larger switch matrices.
In the 40-pin DIP package, crosstalk (70dB at 5MHz) is minimized, and board area and complexity are simplified by using a straight-through pinout. The analog inputs and outputs are on opposite sides, and each channel is separated by a power-supply line or quiet digital logic line.

特性 Features

? Routes Any Input Channel to Any Output Channel
? Switches Standard Video Signals
? Serial or Parallel Digital Interface
? Expandable for Larger Switch Matrices
? 80dB All-Channel Off Isolation at 5MHz
? 8 Internal Buffers with:
? 250V/μs Slew Rate, Three-State Output Capability,
? Power-Saving Disable Feature, 35MHz Bandwidth

應(yīng)用 Application

? 視頻編輯
? 視頻安全系統(tǒng)
? 視頻測試設(shè)備

簡介

MAX456屬于集成電路（IC）的模擬開關(guān)-特殊用途。由制造生產(chǎn)的MAX456模擬開關(guān) - 特殊用途特殊用途模擬開關(guān)通過固態(tài)設(shè)備路由模擬信號。該系列產(chǎn)品的與眾不同之處在于，這些模擬開關(guān)針對特定的應(yīng)用，因此具有通用模擬開關(guān)通常所沒有的獨(dú)特功能。