MPC948

MOTOROLA SEMICONDUCTOR TECHNICAL DATA Low Voltage 1:12 Clock Distribution Chip The MPC948 is a 1:12 low voltage clock distribution chip. The device features the capability to select either a differential LVPECL or a LVTTL compatible input. The 12 outputs are LVCMOS or LVTTL compatible and feature the drive strength to drive 50Ω series terminated transmission lines. With output–to–output skews of 350ps, the MPC948 is ideal as a clock distribution chip for the most demanding of synchronous systems. For a similar product targeted at a lower price/performance point, please www.DataSheet4U.com consult the MPC947 data sheet. MPC948 LOW VOLTAGE 1:12 CLOCK DISTRIBUTION CHIP Clock Distribution for PowerPC™ 620 L2 Cache LVPECL or LVCMOS/LVTTL Clock Input 350ps Maximum Output–to–Output Skew Drives Up to 24 Independent Clock Lines Maximum Output Frequency of 150MHz Synchronous Output Enable Tristatable Outputs 32–Lead TQFP Packaging 3.3V VCC Supply Voltage FA SUFFIX 32–LEAD TQFP PACKAGE CASE 873A–02 With an output impedance of approximately 7Ω, in both the HIGH and LOW logic states, the output buffers of the MPC948 are ideal for driving series terminated transmission lines. More specifically, each of the 12 MPC948 outputs can drive two series terminated 50Ω transmission lines. With this capability, the MPC948 has an effective fanout of 1:24 in applications where each line drives a single load. With this level of fanout, the MPC948 provides enough copies of low sk...