PCK2000M datasheet(2/12 Pages) PHILIPS

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Philips Semiconductors

Product specification

PCK2000M

CK97 (66/100MHz) Mobile System Clock Generator

1998 Sep 29

853-2128 20101

FEATURES

• Reduced pincount version of PCK2000 for mobile applications

• Mixed 2.5V and 3.3V operation

• Two CPU clocks at 2.5V

• Six synchronous PCI clocks at 3.3V, one free–running

• One 3.3V reference clock @ 14.318 MHz

• Reference 14.31818 MHz Xtal oscillator input

• 100 MHz or 66 MHz operation

• Power management control input pins

• 175 ps CPU clock jitter

• 175 ps skew on outputs

• Available in 28–pin SSOP package

• 1.5 – 4ns CPU–PCI delay

• Power down if PWRDWN is held LOW

• See PCK2000 for 48-pin version

DESCRIPTION

The PCK2000M is a clock synthesizer/driver chip for a Pentium Pro

or other similar processors, typically used in mobile applications.

The PCK2000M has two CPU clock outputs at 2.5V. There are six

PCI clock outputs running at 33 MHz. One of the PCI clock outputs

is free–running. The 3.3V reference clock outputs at 14.318 MHz.

All clock outputs meet Intel’s drive strength, rise/fall time, jitter,

accuracy, and skew requirements.

The part possesses dedicated powerdown, CPUSTOP, and

PCISTOP input pins for power management control. These inputs

are synchronized on–chip and ensure glitch–free output transitions.

When the CPUSTOP input is asserted, the CPU clock outputs are

driven LOW. When the PCISTOP inputs is asserted, the PCI clock

outputs are driven LOW.

Finally, when the PWRDWN input pin is asserted, the internal

reference oscillator and PLLs are shut down, and all outputs are

driven LOW, except the free running PCICLK_F clock output.

The PCK2000M is available in a 28–pin SSOP package.

PIN CONFIGURATION

VSSPCI0

PCICLK_F

PCICLK1

VDDPCI0

PCICLK2

PCICLK3

VDDPCI1

PCICLK4

PCICLK5

CPUSTOP

VSSPCI1

PCISTOP

VSSCORE1

VDDCORE1

VSSCPU

CPUCLK1

CPUCLK0

VDDCPU

REF

PWRDWN

VDDCORE0

SEL

VSSCORE0

SEL100/66

TOP VIEW

227

XTAL IN

XTAL OUT

VDDREF

VSSREF

SA00448

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

OUTSIDE NORTH AMERICA

NORTH AMERICA

DRAWING NUMBER

28-Pin Plastic SSOP

°C to +70°C

PCK2000M DB

SOT341-1

Intel and Pentium are registered trademarks of Intel Corporation.

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