GENERAL DESCRIPTION

The W83194BR-603 is a Clock Synthesizer for Intel Springdale/Prescott chipset. W83194BR-603 provides all clocks required for high-speed microprocessor and provides step-less frequency programming and 32 different frequencies of CPU, PCI, and 3V66 clocks setting, support SRC clock outputs, all clocks are externally selectable with smooth transitions.

The W83194BR-603 provides I2C serial bus interface to program the registers to enable or disable each clock outputs and provides -0.5 and +/-0.25 center type spread spectrum or programmable S.S.T. scale to reduce EMI.

The W83194BR-603 also has watchdog timer and reset output pin to support auto-reset when systems hanging caused by improper frequency setting.

The W83194BR-603 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.

PRODUCT FEATURES

• 2 0.7V current-mode Differential pairs clock outputs for CPU

• 1 0.7V current-mode Differential pairs clock outputs for SRC

• 3 3V66 clock outputs

• 1 VCH/3V66 selectable 48MHz or 66MHz

• 9 PCI synchronous clocks

• 1 24_48Mhz clock output for super I/O.

• 1 48 MHz clock output for USB.

• 2 14.318MHz REF clock outputs.

• 3V66/PCI clock out supports synchronous and asynchronous mode

• Smooth frequency switch with selections from 100 to 400MHz

• Step-less frequency programming

• I2C 2-Wire serial interface and support byte read/write and block read/write.

• -0.5 and +/- 0.25 center type spread spectrum

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

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

• Programmable clock outputs Slew rate control and Skew control

• Watch Dog Timer and RESET# output pins

• 48-pin SSOP package