PCK940L
Overview
The PCK940L is a 1 : 18 low voltage clock distribution chip with 2.5 V or 3.3 V LVCMOS output capabilities. The device features the capability to select either a differential LVPECL or an LVCMOS compatible input.
- If a lower output impedance is desired, please see the PCK942C data sheet. The differential LVPECL inputs of the PCK940L allow the device to interface directly with a LVPECL fan-out buffer like the PCKEP111 to build very wide clock fan-out trees or to couple to a high frequency clock source. The LVCMOS input provides a more standard interface for applications requiring only a single clock distribution chip at relatively low frequencies. In addition, the two clock sources can be used to provide for a test clock interface as well as the primary system clock. A logic HIGH on the LVCMOS_CLKSEL pin will select the LVCMOS level clock input. All inputs of the PCK940L have internal pull-up/pull-down resistors so they can be left open if unused. The PCK940L is a single or dual supply device. The device power supply offers a high degree of flexibility. The device
