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General description

The PCK942C is a 1 : 18 low voltage clock distribution chip with 2.5 V or 3.3 V LVCMOS output capabilities. The device is offered in two versions: the PCK942C has an LVCMOS input clock, while the PCK942P has an LVPECL input clock. The 18 outputs are 2.5 V or 3.3 V LVCMOS compatible and feature the drive strength to drive 50 ? series or parallel terminated transmission lines. With output-to-output skews of 200 ps, the PCK942C is ideal as a clock distribution chip for the most demanding of synchronous systems. The 2.5 V outputs also make the device ideal for supplying clocks for a higher performance Pentium II microprocessor based design.

Features

■ LVCMOS/LVTTL clock input

■ 2.5 V LVCMOS outputs for Pentium II microprocessor support

■ 150 ps maximum targeted output-to-output skew

■ Maximum output frequency of 250 MHz @ 3.3 V VCC

■ 32-lead LQFP packaging

■ Single 3.3 V or 2.5 V supply voltage