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ICS94228 - Programmable System Clock Chip

Description

PIN NUMBER 1, 15, 23, 25, 2, 8, 12, 19, 29, 37, 43 3 4 5 6 7 9 10 21, 20, 18, 17, 16, 14, 13, 11 22 24 28, 27, 26 30 31 32 33 34 35 36 38 39 40 42 41 44 45 46 47 48 PIN NAME VDD GND X1 X2 AVDD48 FS21, 2 48MHz FS31, 2 24_48MHz PCICLK_F SEL24_48#1, 2 PCICLK0 PCICLK (8:1) PCICLK9_E SRESET#1 AGP (2:0)

Features

  • 1 - Differential pair open drain CPU clocks @ 2.7V.
  • 1 - Differential pair push-pull CPU clocks @ 2.5V.
  • 11 - PCI including 1 free running and 1 early @ 3.3V.
  • 1 - 48MHz, @ 3.3V fixed.
  • 1 - 24/48MHz @ 3.3V.
  • 3 - REF @ 3.3V, 14.318MHz. Features:.
  • Programmable output frequency.
  • Programmable output rise/fall time.
  • Programmable slew and skew control for CPUCLK, PCICLK, AGP, REF, 48MHz and 24_48MHz.
  • Real time sy.

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Datasheet Details

Part number ICS94228
Manufacturer Integrated Circuit Systems
File Size 184.19 KB
Description Programmable System Clock Chip
Datasheet download datasheet ICS94228 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.DataSheet4U.com Integrated Circuit Systems, Inc. ICS94228 Programmable System Clock Chip for AMD - K7™ processor Recommended Application: VIA KT266 style chipset Output Features: • 1 - Differential pair open drain CPU clocks @ 2.7V • 1 - Differential pair push-pull CPU clocks @ 2.5V • 11 - PCI including 1 free running and 1 early @ 3.3V • 1 - 48MHz, @ 3.3V fixed • 1 - 24/48MHz @ 3.3V • 3 - REF @ 3.3V, 14.318MHz. Features: • Programmable output frequency. • Programmable output rise/fall time. • Programmable slew and skew control for CPUCLK, PCICLK, AGP, REF, 48MHz and 24_48MHz. • Real time system reset output. • Spread spectrum for EMI control typically by 7dB to 8dB, with programmable spread percentage. • Watchdog timer technology to reset system if over-clocking causes malfunction.
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