General Description
The ICS9148-12 is a Clock Synthesizer chip for Pentium and PentiumPro CPU based Desktop/Notebook systems that will provide all necessary clock timing.

Features
• CPU outputs are stronger drive for multiple loads per pin (ie CPU and NB on one pin)
• Generates system clocks for CPU, IOAPIC, SDRAM, PCI, plus 14.314 MHz REF(0:1), USB, Plus Super I/O
• Supports single or dual processor systems
• I2C serial configuration interface provides output clock disabling and other functions
• MODE input pin selects optional power management input control pins
• Two fixed outputs separately selectable as 24 or 48MHz
• Separate 2.5V and 3.3V supply pins
• 2.5V or 3.3V outputs: CPU, IOAPIC
• 3.3V outputs: SDRAM, PCI, REF, 48/24 MHz
• CPU 3.3_2.5# logic pin to adjust output strength
• No power supply sequence requirements
• Uses external 14.318MHz crystal
• 48 pin 300 mil SSOP and 240 mil TSSOP
• Output enable register
   for serial port control: 1 = enable
                                      0 = disable