GENERAL DESCRIPTION
The W83194AR-73 is a Clock Synthesizer for Intel Whitney chipset. W83194AR-73 provides all clocks required for high-speed RISC or CISC microprocessor and also provides 32 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 150MHz
● I2C 2-Wire serial interface and I2C read back
● 0.25% center and 0-0.5% down type spread spectrum
● Programmable registers to enable/stop each output and select modes
(mode as Tri-state or Normal )
● 48 MHz for USB
● 24 MHz for super I/O
● Packaged in 48-pin SSOP