W83193R Winbond Electronics Corp America, W83193R Datasheet - Page 2

• Manufacturer Part Number: W83193R
• Description: Description = 83.3MHz/100MHz Intel Lx/ex Clock Gen. ;; Package = Ssop 48
• Manufacturer: Winbond Electronics Corp America

1.0 GENERAL DESCRIPTION
The W83193R-02/-04/-04A is a Main board Clock Synthesizer which provides all clocks required for
high-speed RISC or CISC microprocessor such as Intel PentiumPro, PentiumII, AMD or Cyrix. Eight
different frequency of CPU and PCI clocks are externally selectable with smooth transitions.
The W83193R-02/-04/-04A also provides I
disable each clock outputs and choose the 0.5% or 1.5% center type spread spectrum.
The W83193R-02/-04/-04A accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V
supply.
into 30 pF loads. CPU CLOCK outputs typically provide better than 1 V /ns slew rate into 20 pF loads
as maintaining 50± 5% duty cycle. The fixed frequency outputs as REF, 24MHz, and 48 MHz
provide better than 0.5V /ns slew rate.
2.0 PRODUCT FEATURES
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• 12 SDRAM clocks for 3 DIMs.
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Smooth frequency switch with selections from 50 MHz to 83.3 MHz CPU. (W83193R-04)
Spread spectrum function to reduce EMI.
Supports Pentium, Pentium Pro, Pentium II, AMD and Cyrix CPUs with I
4 CPU clocks
7 PCI synchronous clocks.
One IOAPIC clock for multiprocessor support.
Optional single or mixed supply:
< 250ps skew among CPU and SDRAM clocks.
< 250ps skew among PCI clocks.
Smooth frequency switch with selections from 50 MHz to 112 MHz CPU. (W83193R-04A)
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Programmable registers to enable/stop each output and select modes
MODE pin for power Management
48 MHz for USB
24 MHz for super I/O
Packaged in 48-pin SSOP
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(mode as Tri-state or Normal )
C 2-Wire serial interface and I
(Vdd = Vddq3 = Vddq2 = Vddq2b = 3.3V) or (Vdd = Vddq3 = 3.3V, Vddq2 = Vdq2b = 2.5V)
High drive PCI and SDRAM CLOCK outputs typically provide greater than 1 V /ns slew rate
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C read back.
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C serial bus interface to program the registers to enable or
Publication Release Date: Nov. 1998
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C.
Revision 1.0