(China (Mainland))
Product Summary
The ICS9248-55 is a Clock Synthesizer chip for Pentium and PentiumPro CPU based Desktop/Notebook systems that will provide all necessary clock timing. Features include four CPU and eight PCI clocks. Three reference outputs are available equal to the crystal frequency. Additionally, the device meets the Pentium power-up stabilization requirement, assuring that CPU and PCI clocks are stable within 2ms after power-up.
Parametrics
ICS9248BF-55 absolute maximum ratings: (1)Supply Voltage: 7.0V; (2)Logic Inputs: GND -0.5V to VDD +0.5V; (3)Ambient Operating Temperature: 0℃ to +70℃; (4)Storage Temperature: -65℃ to +150℃.
Features
ICS9248BF-55 features: (1)Generates system clocks for CPU, IOAPIC, PCI, plus14.314 MHz REF (0:2), USB, and Super I/O; (2)Supports single or dual processor systems; (3)Supports Spread Spectrum modulation for CPU & PCI clocks, down spread -0.5%; (4)Skew from CPU (earlier) to PCI clock (rising edges for 100/33.3MHz) 1.5 to 4ns; (5)Two fixed outputs at 48MHz; (6)Separate 2.5V and 3.3V supply pins; (7)2.5V or 3.3V output: CPU, IOAPIC; (8)3.3V outputs: PCI, REF, 48MHz; (9)No power supply sequence requirements; (10)Uses external 14.318MHz crystal, no external load cap required for CL=18pF crystal; (11)48 pin 300 mil SSOP.
Diagrams
