GENERAL DESCRIPTION

The W83195BR-118 is a Clock Synthesizer for Intel P4 processors and Intel Grandsdale chipsets. W83195BR-118 provides all clocks required for high-speed microprocessor and provides step-less frequency programming, 32 different frequencies of CPU, PCI, PCI-Express clocks setting.

Simultaneously W83195BR-118 supports SRC 100MHz for SATA and DOT 96MHz clock outputs for integrated graphic chipsets. All clocks are externally selectable with smooth transitions.

The W83195BR-118 programs the registers to enable or disable each clock outputs through I2C serial bus interface and provides -0.5 down type spread spectrum or programmable spread spectrum scale to reduce EMI.

The W83195BR-118 also has watchdog timer and reset output pin to support auto-reset when systems hanging caused by improper frequency setting.

The W83195BR-118 is driven with a 14.318 MHz reference crystal and runs on a 3.3V supply.

PRODUCT FEATURES

• 2 pair 0.7 V current mode Differential clock outputs for CPU

• 1 pair 0.7V current mode Differential 100 MHz clock outputs for SRC.

• 1 pair 0.7V current mode Differential 96MHz clock outputs for DOT.

• 5 pair 0.7V current mode Differential clock outputs for PCI-Express

• 6 PCI clock outputs for PCI

• 3 PCI clock free running outputs for PCI

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

• 1 48 MHz clock output for USB.

• 2 14.318MHz REF clock outputs.

• Step-less frequency programming

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

• -0.5 down type spread spectrum in H/W and software select mode

• Programmable spread spectrum scale to reduce EMI in M/N mode

• Programmable registers to enable/stop each output.

• Programmable clock outputs to control slew rate and skew.

• Watch Dog Timer and RESET# output pins

• 56 pin SSOP package