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W83194BR-KT

Features: · Supports AMD CPU with I2C.· 3 CPU clocks (one free-running chipset clock controlled by I2C)· 13 SDRAM clocks for 3 DIMMs· 6 PCI synchronous clocks· Optional single or mixed supply: (Vddq2 =2.5V, Vddq3 =3.3V)· < 250ps skew among CPU and SDRAM clocks· < 250ps skew among PCI clocks·...

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W83194BR-KT: Features: · Supports AMD CPU with I2C.· 3 CPU clocks (one free-running chipset clock controlled by I2C)· 13 SDRAM clocks for 3 DIMMs· 6 PCI synchronous clocks· Optional single or mixed supply: (Vddq...

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Part Number:
W83194BR-KT
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/20

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Product Details

Description



Features:

·  Supports AMD CPU with I2C.
·  3 CPU clocks (one free-running chipset clock controlled by I2C)
·  13 SDRAM clocks for 3 DIMMs
·  6 PCI synchronous clocks
·  Optional single or mixed supply: (Vddq2 =2.5V, Vddq3 =3.3V)
·  < 250ps skew among CPU and SDRAM clocks
·  < 250ps skew among PCI clocks
·  < 5ns 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 66 MHz to 200 MHz CPU
·  Step-less frequency programming by controlling the VCO freq. and the clock output divisor ratio
·  I2C 2-Wire serial interface and I2C read back
·  ±0.25% or ±0.5% spread spectrum function to reduce EMI
·  Programmable spread spectrum in the M/N step-less mode
·  Programmable registers to enable/stop each output and select modes
·  MODE pin for power Management and RESET# out when Watch Dog Timer time out
·  One 48 MHz for USB & one 24 MHz for super I/O
·  48-pin SSOP package


Pinout

Connection Diagram


Description

The W83194BR-KT is a Clock Synthesizer which provides all clocks required for AMD K7.

W83194BR-KT provides 64 CPU/PCI frequencies which are selectable with smooth transitions by hardware or software.
W83194BR-KT also provides 13 SDRAM clocks controlled by the none-delay buffer_in pin.

The W83194BR-KT provides step-less frequency programming by controlling the VCO freq. and the programmable PCI clock output divisor ratio. A watchdog timer is quipped and when time out, the RESET# pin will output 4ms pulse signal.
The W83194BR-KT accepts a 14.318 MHz reference crystal as its input. Spread spectrum built in at ±0.5% or ±0.25% to reduce EMI. Programmable stopping individual clock outputs and frequency selection through I2C interface. The device meets the Pentium power-up stabilization, which requires CPU and PCI clocks be stable within 2 ms after power-up. Using dual function pin for the slots (ISA, PCI, CPU, DIMM) is not recommend.




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