W83194BR-C

W83194BR-C 200MHZ CLOCK FOR CAMINO CHIPSET 1.0 GENERAL DESCRIPTION The W83194BR-C is a Clock Synthesizer for Intel Camino 820 chipset. W83194BR-C provides all clocks required for high-speed RISC or CISC microprocessor and also provides 64 different frequencies of CPU, PCI, 3V66, IOAPIC clocks frequency setting. All clocks are externally selectable with smooth transitions. The W83194BR-C provides I2C serial bus interface to program the registers to enable or disable each clock outputs and provides 0.5% and 0.75% center type spread spectrum to reduce EMI. The W83194BR-C accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply. High drive PCI CLOCK outputs typically provide greater than 1 V /ns slew rate into 30 pF loads. CPU CLOCK outputs typically provide better than 1 V /ns slew rate into 20 pF loads as maintaining 50± 5% duty cycle. The fixed frequency outputs as REF, 24MHz, and 48 MHz provide better than 0.5V /ns slew rate. 2.0 PRODUCT FEATURES 2 CPU clock outputs One CPU/2 output as reference input to DRCG 3 3V66 clock outputs 3 IOAPIC clock outputs 8 PCI synchronous clocks. Optional single or mixed supply: (VddQ2 = VddQ3 = 3.3V or VddQ3=3.3V, VddQ2=2.5V) CPU to 3V66 offset .0 to 1.5 ns 3V66 to PCI offset 1.5 to 4.0 ns 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 Pro...