GENERAL DESCRIPTION

The W83194BR-SD is a Clock Synthesizer for Intel P4 Springdale series chipset. W83194BR-SD provides all clocks required for high-speed microprocessor and provides step-less frequency programming and 32 different frequencies of CPU, SRC, PCI, and 3V66 clocks setting. All clocks are externally selectable with smooth transitions.

FEATURES

• 2 pairs current mode differential clock for CPU and Chipset

• 1 pairs current mode differential clock for SRC

• 3 3V66 clock outputs

• 1 3V66/VCH clock output default 66MHz

• 9 PCI synchronous clocks, 3 free running

• 2 48MHz clock outputs for USB and DOT

• 1 24_48MHz for I/O chip, default 48MHz

• 3 REF 14.318MHz clock outputs

• SRC/AGP/PCI clock out supports synchronous and asynchronous mode

• 3V66 leads PCICLK from 1.5ns to 3.5ns

• I2C 2-Wire serial interface supports block and byte mode read/write

• Step-less frequency programming

• Smooth frequency switch with selections from 100 to 400MHz

• Programmable clock outputs Slew rate control and Skew control

• +/- 0.25 center type spread spectrum in table mode

• Programmable S.S.T. scale to reduce EMI

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

• Watch Dog Timer and RESET# output pins

• 48-pin SSOP package