GENERAL DESCRIPTION

The W83194AR-We is a Clock Synthesizer for Intel Whitney chipset. W83194AR-We provides all clocks required for high-speed RISC or CISC microprocessor and also provides 64 different frequencies of CPU, SDRAM, PCI, 3V66, IOAPIC clocks frequency setting. All clocks are externally selectable with smooth transitions.

PRODUCT FEATURES

● 2 CPU clocks

● 9 SDRAM clocks for 2 DIMMs

● 8 PCI synchronous clocks.

● Optional single or mixed supply:

(VddR = VddP=VddS = Vdd48 = Vdd3 = 3.3V, VddA=VddC=2.5V)

● Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns

● Smooth frequency switch with selections from 66.8 to 200MHz

● I2C 2-Wire serial interface and I2C read back

● 0.5 and 0.75 center type spread spectrum

● Programmable registers to enable/stop each output and select modes

(mode as Tri-state or Normal )

● Two 48 MHz pins for USB

● 24 MHz for super I/O

● 48-pin SSOP package