The NB3N3020 is a high precision, low phase noise selectable clock multiplier. The device takes a 5.0-27 MHz fundamental mode parallel resonant crystal or a 2.0-210 MHz LVCMOS single ended clock source and generates a differential LVPECL output and a single ended LVCMOS/LVTTL output at a selectable clock output frequency which is a multiple of the input clock frequency. Three tri-level LVCMOS/LVTTL single ended select pins set one of 26 possible clock multipliers. LVCMOS/LVTTL output enable (OE) tri-states clock outputs when low. This device is housed in 5.0 x 4.4 mm TSSOP-16.