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W83194R-17

Winbond
Part Number W83194R-17
Manufacturer Winbond
Description 100MHZ AGP CLOCK FOR SIS CHIPSET
Published Apr 17, 2005
Detailed Description W83194R-17/-17A 100MHZ AGP CLOCK FOR SIS CHIPSET 1.0 GENERAL DESCRIPTION The W83194R-17/-17A is a Clock Synthesizer whic...
Datasheet PDF File W83194R-17 PDF File

W83194R-17
W83194R-17


Overview
W83194R-17/-17A 100MHZ AGP CLOCK FOR SIS CHIPSET 1.
0 GENERAL DESCRIPTION The W83194R-17/-17A is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor such as Intel PentiumII, PentiumPro , AMD or Cyrix.
Eight different frequency of CPU, AGP and PCI clocks are externally selectable with smooth transitions.
The W83194R-17/-17A provides AGP clocks especially for clone chipset.
The highest CPU frequency provided by the W83194R-17 is up to 100MHz, but the one of W83194R-17A is up to 133MHz.
The W83193R-17/-17A provides I2C serial bus interface to program the registers to enable or disable each clock outputs and choose the 0.
5% or 1.
5% center type spread spectrum to reduce EMI.
The W83194R-17/-17A accepts a 14.
318 MHz reference crystal as its input and runs on a 3.
3V supply.
High drive PCI and SDRAM 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 Ó5% duty cycle.
The fixed frequency outputs as REF, 24MHz, and 48 MHz as maintaining 50¡ provide better than 0.
5V /ns slew rate.
2.
0 PRODUCT FEATURES • • • • • • • • • • • • • • • Supports Pentium™, Pentium™ Pro, Pentium™ II, AMD and Cyrix CPUs with I2C.
4 CPU clocks 12 SDRAM clocks for 3 DIMMs Two AGP clocks 6 PCI synchronous clocks.
Optional single or mixed supply: (Vdd = Vddq3 = Vddq2 = Vddq2b = 3.
3V) or (Vdd =Vddq2 = Vddq3 = 3.
3V, Vddq2b = 2.
5V) Skew form CPU to PCI clock -1 to 4 ns, center 2.
6 ns, AGP to CPU sync.
skew 0 ns (250 ps) Smooth frequency switch with selections from 60 MHz to 133 MHz CPU I2C 2-Wire serial interface and I2C read back ¡Ó0.
5% or ¡Ó1.
5% center type spread spectrum function to reduce EMI Programmable registers to enable/stop each output and select modes (mode as Tri-state or Normal ) MODE pin for power Management 48 MHz for USB 24 MHz for super I/O 48-pin SSOP package -1- Publication Release Date: Sep.
1998 Revision 0.
20 W83194R-17/-17A PRELI...



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