General Description

The ICS9147-01 generates all clocks required for high speed RISC or CISC microprocessor systems such as Intel PentiumPro. Two bidirectional I/O pins (FS1,FS2) are latched at power-on to the functionality table, with FS0 selectable in real-time to toggle between conditions. The inputs provide for tristate and test mode conditions to aid in system level testing. These multiplying factors can be customized for specific applications. Glitch-free stop clockcontrols are provided for CPU clocks and BUS clocks.

特性 Features

? Four copies of CPU clock

? Six SDRAM (3.3 V TTL), usable as AGP clocks

? Seven copies of BUS clock (synchronous with CPU clock/2 or CPU/2.5 for 75 and 83.3 MHz CPU)

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

? One IOAPIC clock @14.31818 MHz

? Two copies of Ref. clock @14.31818 MHz

? One each 48/ 24 MHz (3.3 V TTL)

? This device is configured into the Mobile mode for power management of Intel 430 TX

? Ref. 14.31818 MHz Xtal oscillator input

? Separate 66/60 MHz select pin (LSB of select pins)

? Separate VDD2 for four CPU and single IOAPIC output

buffers to allow 2.5V output (or Std. Vdd)

? Power Management Control Input pins

? 3.0V – 3.7V supply range w/2.5V compatible outputs

? 48-pin SSOP package