W83194BR-323 View Datasheet(PDF) - Winbond

Part Name

Description

Manufacturer

W83194BR-323

STEPLESS CLOCK FOR INTEL BROOKDALE CHIPSET

Winbond 

W83194BR-323W83194BG-323

STEPLESS CLOCK FOR INTEL BROOKDALE CHIPSET

1. GENERAL DESCRIPTION

The W83194BR-323 is a Clock Synthesizer for Intel Brook dale 845 chipset. W83194BR-323

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. All clocks are

externally selectable with smooth transitions.

The W83194BR-323 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-323 also has watchdog timer and reset output pin to support auto-reset when

systems hanging caused by improper frequency setting.

The W83194BR-323 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. The

fixed frequency outputs as REF and 48 MHz provide better than 0.5V /ns slew rate.

2. PRODUCT FEATURES

3 Differential pairs of CPU clock outputs

• 4 3V66 clock outputs

• 10 PCI synchronous clocks

• 24_48Mhz clock output for super I/O.

• 48 MHz clock output for USB.

• Skew form CPU to PCI clock 1 to 4 ns, center 2.6 ns

• Smooth frequency switch with selections from 66.8 to 200MHz

• 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

• Watch Dog Timer and RESET# output pins

• 48-pin SSOP package

Publication Release Date: March 2006

-1-

Revision 2.1

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