GENERAL DESCRIPTION

The W83194BR-S is a Clock Synthesizer for Intel 815 Solano chipset. W83194BR-S 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

• 3 3V66 for chipset and AGP clocks

• 9 SDRAM clocks for 2 DIMMs

• 7 PCI synchronous clocks.

• Optional single or mixed supply:

(VddR = VddP=VddS = Vdd48 = Vdd3 = 3.3V, VddLAPIC=VddLCPU=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 200 MHz

• I2C 2-Wire serial interface and I2C read back

• 0.25 and 0.5 center type spread spectrum

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

• Two 48 MHz pins for USB

• 24 MHz for super I/O

• 48-pin SSOP package