W83194BR-250

Features: • 4 CPU clocks• 3 AGP for chipset and AGP clocks• 9 PCI synchronous clocks.• Optional single or mixed supply: (VddR = VddP= Vdd48 = VddA =Vdd = 3.3V, VddLAPIC=VddLCPU=2.5V)• Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns• Smooth frequency switch ...

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SeekIC No. : 004545106 Detail

W83194BR-250: Features: • 4 CPU clocks• 3 AGP for chipset and AGP clocks• 9 PCI synchronous clocks.• Optional single or mixed supply: (VddR = VddP= Vdd48 = VddA =Vdd = 3.3V, VddLAPIC=VddLC...

floor Price/Ceiling Price

Part Number:
W83194BR-250
Supply Ability:
5000

Price Break

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

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Upload time: 2024/3/27

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Product Details

Description



Features:

• 4 CPU clocks
• 3 AGP for chipset and AGP clocks
• 9 PCI synchronous clocks.
• Optional single or mixed supply: (VddR = VddP= Vdd48 = VddA =Vdd = 3.3V, VddLAPIC=VddLCPU=2.5V)
• Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns
• Smooth frequency switch with selections from 66.8 to 200 MHz
• I2C 2-Wire serial interface and I2C read back
• 0.25% and 0.5% center type spread spectrum
• Programmable registers to enable/stop each output and select modes
• 48 MHz for USB
• 24 MHz for super I/O
• 48-pin SSOP package



Pinout

  Connection Diagram


Description

The W83194BR-250 is a Clock Synthesizer for VIA Pro266 chipset. W83194BR-250 provides all clocks required for high-speed RISC or CISC microprocessor and also provides 64 different frequencies of CPU, PCI, AGP, IOAPIC clocks frequency setting. All clocks are externally selectable with smooth transitions.

The W83194BR-250 provides I2C serial bus interface to program the registers to enable or disable each clock outputs and provides 0.25% and 0.5% center type spread spectrum to reduce EMI.

The W83194BR-250 provides stepless frequency programming by controlling the VCO freq. and the clock output divisor ratio. Also the skew of CPU and AGP clock outputs are programmable. A watch dog timer is quipped and when time out, the RESET# pin will output 4ms pulse signal.

The W83194BR-250 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, 24MHz, and 48 MHz provide better than 0.5V /ns slew rate.




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