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ICS9147-12

Features: · Generates system clocks for CPU, IOAPIC, SDRAM, PCI, plus 14.318 MHz REF(0:2), USB, Plus Super I/O· Supports single or dual processor systems· Supports Intel 60, 66.8MHz, Cyrix 55, 75MHz plus 83.3 and 68MHz (Turbo of 66.6) speeds.· Synchronous clocks skew matched to 250ps window on CPU...

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SeekIC No. : 004371155 Detail

ICS9147-12: Features: · Generates system clocks for CPU, IOAPIC, SDRAM, PCI, plus 14.318 MHz REF(0:2), USB, Plus Super I/O· Supports single or dual processor systems· Supports Intel 60, 66.8MHz, Cyrix 55, 75MHz...

ICS9147-12 Data Sheet

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Part Number:
ICS9147-12
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:

· Generates system clocks for CPU, IOAPIC, SDRAM, PCI, plus 14.318 MHz REF(0:2), USB, Plus Super I/O
· Supports single or dual processor systems
· Supports Intel 60, 66.8MHz, Cyrix 55, 75MHz plus 83.3 and 68MHz (Turbo of 66.6) speeds.
· Synchronous clocks skew matched to 250ps window on CPU, SDRAM and 500ps window on PCI clocks
· CPU clocks to PCI clocks skew 1-4ns (CPU early)
· Two fixed outputs, 48MHz and 24 MHz
· Separate 2.5V and 3.3V supply pins
- 2.5V or 3.3V output: CPU, IOAPIC
- 3.3V outputs: SDRAM, PCI, REF, 48/24 MHz
· No power supply sequence requirements
· 48 pin 300 mil SSOP


Pinout

Connection Diagram


Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 V
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . GND-0.5 V to VDD +0.5 V
Ambient Operating Temperature . . . . . . . . . . . . . . . . . . 0°C to +70°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . .  . . .-65°C to +150°C


Description

The ICS9147-12 is a Clock Synthesizer chip for Pentium and PentiumPro plus Cyrix CPU based Desktop/Notebook systems that will provide all necessary clock timing.

Features of the ICS9147-12 include four CPU, seven PCI and eight SDRAM clocks. Three reference outputs are available equal to the crystal frequency, plus the IOAPIC output powered by VDDL. Additionally, the device meets the Pentium power-up stabilization, which requires that CPU and PCI clocks be stable within 2ms after power-up.

High drive PCICLK and SDRAM outputs of the ICS9147-12 typically provide greater than 1 V/ns slew rate into 30pF loads. CPUCLK outputs typically provide better than 1V/ns slew rate into 20pF loads while maintaining 50 ±5% duty cycle. The REF clock outputs typically provide better than 0.5V/ns slew rates.

The ICS9147-12 accepts a 14.318MHz reference crystal or clock as its input and runs on a 3.3V supply.




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