General Description

TheICS9148-11 generates all clocks required for high speed RISC or CISC microprocessor systems such as Intel PentiumPro. An output enable pin is provided for testability. MODE allows power management functions: CPU_STOP#, PCI_STOP# & PWR_DWN#.

High drive BCLK outputs typically provide greater than 1V/ns slew rate into 30pF loads. PCLK outputs typically provide better than 1V/ ns slew rate into 20pF loads while maintaining50–5 duty cycle. The REF clock outputs typically provide better than 0.5V/ns slew rates.

特性 Features

? Generates four processor, six bus, one 14.31818MHz and 12 SDRAM clocks.

? Synchronous clocks skew matched to 250ps window on CPU, SDRAM and 500ps window on BUS clocks.

? CPUCLKs to BUS clocks skew 1-4 ns (CPU early)

? Test clock mode eases system design

? Custom configurations available

? VDD(1:3) - 3.3V –10 (inputs 5V tolerant w/series R )

? VDDL(1:2) - 2.5V or 3.3V –5

? PC serial configuration interface

? Power Management Control Input pins

? 48-pin SSOP package