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W83194R-67B

Winbond
Part Number W83194R-67B
Manufacturer Winbond
Description 100MHZ 3-DIMM CLOCK FOR VIA MVP4
Published Apr 17, 2005
Detailed Description W83194R-67B 100MHZ 3-DIMM CLOCK FOR VIA MVP4 1.0 GENERAL DESCRIPTION The W83194R-67B is a Clock Synthesizer which provid...
Datasheet PDF File W83194R-67B PDF File

W83194R-67B
W83194R-67B

Overview
W83194R-67B 100MHZ 3-DIMM CLOCK FOR VIA MVP4 1.
0 GENERAL DESCRIPTION The W83194R-67B is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor such as Intel Pentium , AMD and Cyrix.
W83194R-67B provides sixteen CPU/PCI frequencies which are externally selectable with smooth transitions.
W83194R-67B also provides 13 SDRAM clocks controlled by the none-delay buffer_in pin.
The W83194R-67B accepts a 14.
318 MHz reference crystal as its input and runs on a 3.
3V supply.
Spread spectrum built in at ±0.
5% or ±0.
25% to reduce EMI.
Programmable stopping individual 2 clock outputs and frequency selection through I C interface.
The device meets the Pentium power-up stabilization, which requires CPU and PCI clocks be stable within 2 ms after power-up.
High drive six PCI and thirteen SDRAM CLOCK outputs typically provide greater than 1 V /ns slew rate into 30 pF loads.
Two 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 • • • • • Supports Pentium™ , AMD, Cyrix CPU with I C.
4 CPU clocks (one free-running CPU clock) 13 SDRAM clocks for 3 DIMs 6 PCI synchronous clocks Optional single or mixed supply: (Vddq1=Vddq2 = Vddq3 = Vddq4 = VddL1 =VddL2= 3.
3V) or (Vddq1= Vddq2 = Vddq3=Vddq4 = 3.
3V, VddL1 = VdqL2 = 2.
5V) < 250ps skew among CPU and SDRAM clocks < 4ns propagation delay SDRAM from buffer input Skew from CPU(earlier) to PCI clock -1 to 4ns, center 2.
6ns.
Smooth frequency switch with selections from 60 MHz to 124 MHz CPU 2 2 I C 2-Wire serial interface and I C read back 0~0.
5% down type or ±0.
25% or ±0.
5% spread spectrum function to reduce EMI Programmable registers to enable/stop each output and select modes (mode as Tri-state or Normal ) 2ms power up clock stable time MODE pin for power Management One 48 MHz for USB & one 24 MHz for super I/O Packaged in ...


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