ICS9148-18

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 V
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . GND -0.5 V to VDD +0.5 V
Ambient Operating Temperature . . . . . . . . . . . . . . . 0°C to +70°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings are stress specifications only and functional operation of the device at these or any other conditions above those listed in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.

The ICS9148-18 is a Clock Synthesizer chip for Pentium and PentiumPro CPU based Desktop/Notebook systems that will provide all necessary clock timing.

Features include two CPU and six PCI clocks. One reference output is available equal to the crystal frequency. Additionally, the device meets the Pentium power-up stabilization requirement, acheiving stable CPU and PCI clocks 2ms after power-up.

PD# pin of the ICS9148-18 can enable a low power mode by stopping crystal OSC and PLL stages. Other power management features include, CPU_STOP# which stops CPU (0:1) clocks, and PCI_STOP# which stops PCICLK (0:4) clocks.

High drive CPUCLK outputs of the ICS9148-18 typically provide greater than 1 V/ns slew rate into 20pF loads. PCICLK outputs typically provide better than 1V/ns slew rate into 30pF loads while maintaining 50±5% duty cycle. The REF clock output typically provides better than 0.5V/ns slew rates.

The ICS9148-18 accepts a 14.318MHz reference crystal or clock as its input and runs on a 3.3V core supply.