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W83L197R-16 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - 2-CHIP 100MHZ CLOCK FOR BX NOTEBOOK - Winbond

भाग संख्या W83L197R-16
समारोह 2-CHIP 100MHZ CLOCK FOR BX NOTEBOOK
मैन्युफैक्चरर्स Winbond 
लोगो Winbond लोगो 
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W83L197R-16 pdf
W83L197R-16
1.0 GENERAL DESCRIPTION
The W83L197R-16 is a Clock Synthesizer which provides all clocks required for high-speed RISC or
CISC microprocessor. Four different frequency of CPU, and PCI clocks are externally selectable with
smooth transitions. The 0.5% or 0.75% center type spread spectrum can be selected to reduce EMI.
The W83L197R-16 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. 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, 48 MHz provide better than 0.5V /ns slew rate.
2.0 PRODUCT FEATURES
Supports PentiumII CPUs
4 sets of CPU frequencies selection
2 CPU clocks (one free running CPU clock)
6 PCI synchronous clocks(one free running PCI clock)
Optional single or mixed supply:
(Vdd3 = VddC= 3.3V±5%) or (VddC = 2.5V±5%)
Skew form CPU to PCI clock 1.5 to 4.0 ns, CPU leads.
CPU clock jitter less than 200ps
PCI_F,PCI1:6 clock skew less than 500ps
±0.5% or ±0.75% center type spread spectrum function to reduce EMI
Programmable registers to enable/stop each output and select modes
(mode as Tri-state or Normal )
48 MHz for USB
28-pin SOP package (209mil)
3.0 BLOCK DIAGRAM
Publication Release Date: Mar. 1999
- 2 - Revision 1.0

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