W83194BR-39B

Features: · Supports PentiumÔ II and !!! CPU with I2C.· 2 CPU clocks (one free-running CPU clock)· 13 SDRAM clocks for 3 DIMMs· 6 PCI synchronous clocks· One IOAPIC clock for multiprocessor support· Optional single or mixed supply: (Vddq1=Vddq2 = Vddq3 = Vddq4 = VddL1 =VddL2= 3.3V) or (Vddq1...

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SeekIC No. : 004545109 Detail

W83194BR-39B: Features: · Supports PentiumÔ II and !!! CPU with I2C.· 2 CPU clocks (one free-running CPU clock)· 13 SDRAM clocks for 3 DIMMs· 6 PCI synchronous clocks· One IOAPIC clock for multiprocessor su...

floor Price/Ceiling Price

Part Number:
W83194BR-39B
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: 2024/3/28

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Product Details

Description



Features:

·  Supports PentiumÔ II and !!! CPU with I2C.
·  2 CPU clocks (one free-running CPU clock)
·  13 SDRAM clocks for 3 DIMMs
·  6 PCI synchronous clocks
·  One IOAPIC clock for multiprocessor support
·  Optional single or mixed supply: (Vddq1=Vddq2 = Vddq3 = Vddq4 = VddL1 =VddL2= 3.3V) or (Vddq1= Vddq2 = Vddq3=Vddq4 = 3.3V, VddL1 = VddL2 = 2.5V)
·  < 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 in freq. table mode
·  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
·  RESET# out when watch dog timer time out
·  One 48 MHz for USB & one 24 MHz for super I/O



Pinout

  Connection Diagram


Specifications

Symbol

PARAMETER

RATING
Vdd , VIN
Voltage on any pin with respect to GND
-0.5V to +7.0V
TSTG
Storage Temperature
-65° C to +150° C
TB
Ambient Temperature
-55° C to +125° C

TA

Operating Temperature

0°C to + 70°C




Description

 

The W83194BR-39B is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC  icroprocessor such as Intel Pentium II or Pentium III. W83194BR-39B provides 64 CPU/PCI frequencies which are selectable with smooth transitions by hardware or software. W83194BR-39B also provides 13 SDRAM clocks controlled by the none-delay buffer_in pin.

The W83194BR-39B provides step-less frequency programming by controlling the VCO freq. and the programmable PCI clock output divisor ratio. A watch dog timer is quipped and when time out, the RESET# pin will output 4ms pulse signal.

The W83194BR-39B 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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