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W83195AR-25

Features: · 2 CPU clocks (2.5V)· 3 3V-66 clocks (3.3V)· 12 SDRAM clocks for 3 DIMMs(3.3V)· 8 PCI synchronous clocks.· Optional single or mixed supply: (VDDR = VDDP=VDDS = VDD48 = VDD3 = 3.3V, VDDA=VDDC=2.5V)· Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns· Smooth frequency switch with select...

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SeekIC No. : 004545141 Detail

W83195AR-25: Features: · 2 CPU clocks (2.5V)· 3 3V-66 clocks (3.3V)· 12 SDRAM clocks for 3 DIMMs(3.3V)· 8 PCI synchronous clocks.· Optional single or mixed supply: (VDDR = VDDP=VDDS = VDD48 = VDD3 = 3.3V, VDDA=V...

W83195AR-25 Data Sheet

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Part Number:
W83195AR-25
Supply Ability:
5000

Price Break

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

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Product Details

Description



Features:

·  2 CPU clocks (2.5V)
·  3 3V-66 clocks (3.3V)
·  12 SDRAM clocks for 3 DIMMs(3.3V)
·  8 PCI synchronous clocks.
·  Optional single or mixed supply: (VDDR = VDDP=VDDS = VDD48 = VDD3 = 3.3V, VDDA=VDDC=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 200MHz
·  I2C 2-Wire serial interface and I2C read back
·  0.25% center and 0.5% center type spread spectrum
·  Programmable registers to enable/stop each output and select modes (mode as Tri-state or Normal )
·  48 MHz for USB
·  24 MHz for super I/O
·  Packaged in 56-pin SSOP


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 W83195AR-25 is a Clock Synthesizer for Intel 815 Solano chipset. W83195AR-25 provides all clocks required for high-speed RISC or CISC microprocessor and also provides 64 different frequencies of CPU, SDRAM, PCI, 3V66, IOAPIC clocks frequency setting. All clocks are externally selectable with smooth transitions.

The W83195AR-25 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 W83195AR-25 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.

High drive PCI and SDRAM 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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