NB4N840M中文资料2 x 2 交点开关，双，3.3 V，3.2 Gb / s，带 CML 输出数据手册ONSEMI规格书

描述 Description

The NB4N840M is a high−bandwidth fully differential dual 2 x 2 crosspoint switch with CML inputs/outputs that is suitable for applications such as SDH/SONET DWDM and high speed switching. Fully differential design techniques are used to minimize jitter accumulation, crosstalk, and signal skew, which make this device ideal for loop−through and protection channel switching applications.Internally terminated differential CML inputs accept AC−coupled LVPECL (Positive ECL) or direct coupled CML signals. By providing internal 50 Ohm input and output termination resistor, the need for external components is eliminated and interface reflections are minimized. Differential 16 mA CML outputs provide matching internal 50 Ohm terminations, and 400 mV output swings when externally terminated, 50 Ohm to VCC. Single−ended LVCMOS/LVTTL SEL inputs control the routing of the signals through the crosspoint switch which makes this device configurable as 1:2 fan−out, repeater or 2 x 2 crosspoint switch. The device is housed in a low profile 5 x 5 mm 32−pin QFN package.

特性 Features

• Plugin compatible to the MAX3840 and SY55859L
• Maximum Input Clock Frequency 2.7 GHz
• Maximum Input Data Frequency 3.2 Gb/s
• 225 ps Typical Propagation Delay
• 80 ps Typical Rise and Fall Times
• 7 ps Channel to Channel Skew
• 430 mW Power Consumption
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• 7 ps PeaktoPeak Data Dependent Jitter
• Power Saving Feature with Disabled Outputs
• Operating Range: VCC = 3.0 V to 3.6 V with VEE = 0 V
• CML Output Level (400 mV PeaktoPeak Output), Differential Output
• These are Pb-Free Devices

应用 Application

• OC-3 to OC-48 Line or System Loopback
• Redundant Data Fan-out

简介

NB4N840M属于集成电路（IC）的信号开关多路复用器解码器。由制造生产的NB4N840M信号开关，多路复用器，解码器逻辑型信号开关、多路复用器和编码器 IC 可用于对以数字格式表示数据的电信号进行路由和选择。这些器件与设计用于模拟信号的类似产品有所不同，它们保留的信息表示为两个电状态之一，而不是两个外部界限内的无穷变化量。