NB4N840M

NB4N840M 3.3V 3.2Gb/s Dual Differential Clock/Data 2 x 2 Crosspoint Switch with CML Output and Internal Termination 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, Gigabit Ethernet 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 W 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 W terminations, and 400 mV output swings when externally terminated, 50 W to VCC. Single−ended LVCMOS/LVTTL SEL inputs contro...