Product Overview NB3L204K: 2.5V, 3.3V Differential 1:4 HCSL Fanout Buffer For complete documentation, see the data sheet Product Description The NB3L204K is a differential 1:4 Clock fanout buffer with High-speed Current Steering Logic (HCSL) outputs. Inputs can directly accept differential LVPECL, LVDS, and HCSL signals. Single-ended LVPECL, HCSL, LVCMOS, or LVTTL levels are accepted with a proper external Vth reference supply per Figures 4 and 6. The input signal will be translated to HCSL and provides four identical copies operating up to 350 MHz. The NB3L204K is optimized for ultra-low phase noise, propagation delay variation and low output–to–output skew, and is DB400H compliant. As such, system designers can take advantage of the NB3L204K’s performance to distribute low skew clocks across the backplane or the motherboard making it ideal for Clock and Data distribution applications such as PCI Express, FBDIMM, Networking, Mobile Computing, Gigabit Ethernet, etc. Output drive current is set by connecting a 475 resistor from IREF (Pin 14) to GND per Figure 11. Outputs can also interface to LVDS receivers when terminated per Figure 12. Features • • • • • • • • • Maximum Input Clock Frequency > 350 MHz 2.5 V ±5% / 3.3 V ±10% Supply Voltage Operation 4 HCSL Outputs DB400H Compliant Individual OE Control Pin for Each Bank of Outputs 100 ps Max Output-to-Output Skew Performance 1 ns Typical Propagation Delay 450 ps Typical Rise and Fall Times 80 fs Maximum Additive Phase Jitter RMS Applications • • • • • Mobile Computing Networking Gigabit Ethernet FBDIMM PCI Express Part Electrical Specifications Product Compliance Status Type Chann els Input / Input Output Level Ratio Output VCC Level Typ (V) tJitterR MS Typ (ps) tskew(oo) Max (ps) tpd Typ (ns) tR & tF Max (ps) fmaxClo fmaxDat Packa ck Typ a Typ ge (MHz) (Mbps) Type NB3L204KMNG Pb-free NEW Buffer 1 1:4 HCSL 0.046 20 1 700 350 QFN24 0.046 20 1 700 350 QFN24 Halide free LVD S 3.3 2.5 LVP ECL HCS L NB3L204KMNTXG Pb-free Halide free NEW Buffer 1 1:4 LVP ECL HCSL 3.3 2.5 LVD S HCS L For more information please contact your local sales support at www.onsemi.com Created on: 6/30/2016