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ICS9248-128

Features: • - 3 CPU @ 2.5V/3.3V up to 133.3 MHz.• - 6 PCI @ 3.3V (including 1 free-running)• - 13 SDRAMs @ 3.3V up to 133.3MHz.• - 3 REF @ 3.3V, 14.318MHz• - 1 clock @ 24/14.3 MHz selectable output for SIO• - 1 Fixed clock at 48MHz (3.3V)• - 1 IOAPIC @ 2.5...

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SeekIC No. : 004371228 Detail

ICS9248-128: Features: • - 3 CPU @ 2.5V/3.3V up to 133.3 MHz.• - 6 PCI @ 3.3V (including 1 free-running)• - 13 SDRAMs @ 3.3V up to 133.3MHz.• - 3 REF @ 3.3V, 14.318MHz• - 1 clock @ ...

ICS9248-128 Data Sheet

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Part Number:
ICS9248-128
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:

• - 3 CPU @ 2.5V/3.3V up to 133.3 MHz.
• - 6 PCI @ 3.3V (including 1 free-running)
• - 13 SDRAMs @ 3.3V up to 133.3MHz.
• - 3 REF @ 3.3V, 14.318MHz
• - 1 clock @ 24/14.3 MHz selectable output for SIO
• - 1 Fixed clock at 48MHz (3.3V)
• - 1 IOAPIC @ 2.5V / 3.3V
• Up to 133MHz frequency support
• Support power management: CPU, PCI, SDRAM stop and Power down Mode from I2C programming.
• Spread spectrum for EMI control ( ± 0.25% center spread & 0 to -0.5% down spread).
• Uses external 14.318MHz crystal
• FS pins for frequency select


Pinout

Connection Diagram


Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 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
Case Temperature . . . . . . . . . . . . . . . . . . . . . . . . 115°C


Description

The ICS9248-128 is the single chip clock solution for Desktop/Notebook designs using the SIS style chipset. It provides all necessary clock signals for such a system. Spread spectrum may be enabled through I2C programming. Spread spectrum typically reduces system EMI by 8dB to 10dB.

This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9248-128 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations.

Serial programming I2C interface of the ICS9248-128 allows changing functions, stop clock programming and frequency selection. The SD_SEL latched input allows the SDRAM frequency to follow the CPUCLK frequency(SD_SEL=1) or other clock frequencies
(SD_SEL=0)




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