The NB3N111K is a differential 1:10 Clock fanout buffer with High-speed Current Steering Logic (HCSL) outputs optimized for ultra low propagation delay variation. The NB3N111K is designed with PCI Express HCSL clock distribution and FBDIMM applications in mind. 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. Input pins incorporate separate internal 50 Ω termination resistors allowing additional single ended system interconnect flexibility. The NB3N111K specifically guarantees low output–to–output skew. Optimal design, layout, and processing minimize skew within a device and from device to device. System designers can take advantage of the NB3N111K’s performance to distribute low skew clocks across the backplane or the motherboard. Features:

Typical Input Clock Frequency 100, 133, 166, or 400 MHz

220 ps Typical Rise and Fall Times

800 ps Typical Propagation Delay

tpd 100 ps Maximum Propagation Delay Variation per Diff Pair

0.1 ps Typical RMS Additive Phase Jitter

LVDS Output Levels Optional with Interface Termination

Operating Range: VCC = 3.0 V to 3.6 V with GND = 0 V

Typical HCSL Output Levels (700 mV Peak-to-Peak)

LVDS Output Levels with Interface Termination

These are Pb-Free Devices