NB3L202K 2.5 V, 3.3 V Differential 1:2 HCSL Fanout Buffer Description The NB3L202K is a differential 1:2 Clock fanout buffer with Highspeed Current Steering Logic (HCSL) outputs. Inputs can www.onsemi.com directly accept differential LVPECL, LVDS, and HCSL signals. Singleended LVPECL, HCSL, LVCMOS, or LVTTL levels are accepted with a proper external Vth reference supply per Figures 4 MARKING and 6. The input signal will be translated to HCSL and provides two DIAGRAM identical copies operating up to 350 MHz. 1 The NB3L202K is optimized for ultralow phase noise, propagation QFN16 NB3L 202K 3x3 delay variation and low outputtooutput skew, and is DB200H ALYW CASE 485FM 1 compliant. As such, system designers can take advantage of the NB3L202Ks performance to distribute low skew clocks across the backplane or the motherboard making it ideal for Clock and Data NB3L202K = Specific Device Code distribution applications such as PCI Express, FBDIMM, Networking, A = Assembly Location Mobile Computing, Gigabit Ethernet, etc. L = Wafer Lot Output drive current is set by connecting a 475 resistor from Y = Year W = Work Week IREF (Pin 10) to GND per Figure 11. Outputs can also interface to = PbFree Package LVDS receivers when terminated per Figure 12. (Note: Microdot may be in either location) Features Maximum Input Clock Frequency > 350 MHz 2.5 V 5% / 3.3 V 10% Supply Voltage Operation ORDERING INFORMATION See detailed ordering and shipping information page 13 of this 2 HCSL Outputs data sheet. DB200H Compliant PCIe Gen 3, Gen 4 Compliant Individual OE Control Pin for Each Output 100 ps Max OutputtoOutput Skew Performance 1 ns Typical Propagation Delay 500 ps Typical Rise and Fall Times 80 fs Maximum Additive RMS Phase Jitter 40C to +85C Ambient Operating Temperature QFN 16pin Package, 3 mm x 3 mm These Devices are PbFree and are RoHS Compliant Typical Applications PCI Express FBDIMM Mobile Computing Networking Gigabit Ethernet Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: January, 2018 Rev. 4 NB3L202K/DNB3L202K Figure 1. Simplified Block Diagram Figure 2. 16Pin QFN Pinout (Top View) www.onsemi.com 2