Product Overview NB4L858M: 2x2 Crosspoint Switch, 2.5 V / 3.3 V, 3 GHz Dual Differential Clock/Data, with CML Output and Internal Termination For complete documentation, see the data sheet Product Description The NB4L858M is a high?bandwidth low voltage fully differential dual 2 x 2 crosspoint switch with CML outputs that is suitable for applications such as SDH/SONET DWDM and high speed switching applications. Design technique minimizes jitter accumulation,crosstalk, and signal skew which make this device ideal for loop?through and protection channel switching application. Each 2 x 2 crosspoint switch can fan out and/or multiplex up to 3Gb/s data and 3 GHz clock signals. Differential inputs incorporate a pair of internal 50 Ω termination resistors in a center?tapped configuration (VTDx Pins) and can accept LVPECL (Positive ECL) or CML input signal without any external component. This feature provides transmission line termination on?chip, at the receiver end, eliminating external components. Differential 16 mA CML output provides matching internal 50 Ω terminations, and 400 mV output swings when externally terminated, 50 Ω to VCC. The SELECT inputs are single?ended and can be driven with either LVCMOS or LVTTL input levels. The device is housed in a low profile 7 x 7 mm 32?pin LQFP package. Features • • • • • • • Maximum Input Clock Frequency 3 GHz Maximum Input Data Frequency 3 Gb/s 350 ps Typical Propagation Delay 80 ps Typical Rise and Fall Times 12 ps Channel to Channel Skew 0.5 ps RMS Jitter 5 ps Deterministic Jitter @ 2.5 Gb/s Applications • Crosspoint switch for Networking, ATE and Computing Part Electrical Specifications Product Compliance Status Input/Out Channel put Ratio s Input Level Output Level VCC Typ (V) NB4L858MFAG Pb-free Active 2:1 CML CML CML 4 Halide free NB4L858MFAR2G Pb-free Halide free tJitter Typ (ps) tskew(OO) Max (ps) tpd Typ (ns) Package Type 2.5 0.5 12 350 LQFP-32 2.5 0.5 12 350 LQFP-32 ECL Active 2:1 4 ECL CML For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016 fMax Typ (MHz)