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PCK2022RADGG

CK00 (100/133 MHz) spread spectrum differential system clock generator

Philips Electronics 

Philips Semiconductors

CK00 (100/133 MHz) spread spectrum

differential system clock generator

Product data

PCK2022RA

FEATURES

• 3.3 V operation

• Eight differential CPU clock pairs

• One IO clock at 33 MHz and 66 MHz

• Two 48 MHz clocks at 3.3 V

• One 14.318 MHz reference clock

• Power management control pins

• Host clock jitter less than 200 ps cycle-to-cycle

• Host clock skew less than 150 ps pin-to-pin

• Spread Spectrum capability

• Optimized frequency and spread spectrum performance

DESCRIPTION

This part replaces PCK2022R with improved frequency and spread

spectrum performance.

The PCK2022RA is a clock synthesizer/driver for a Pentium III and

other similar processors.

The PCK2022RA has eight differential pair CPU current source

outputs, one 33/66 MHz output which is configurable on power-up,

two 48 MHz clocks which can be disabled on power-up, and one

3.3 V reference clock at 14.318 MHz which can also be disabled on

power-up. All clock outputs meet Intel’s drive strength, rise/fall times,

jitter, accuracy, and skew requirements.

The part possesses a dedicated power-down input pin for power

management control. This input is synchronized on chip, and

ensures glitch-free output transitions. In addition, the part can be

configured to disable the 48 MHz outputs for lower power operation

and an increase in the performance of the functioning outputs. The

IOCLK and REFCLK can also be disabled for the highest

performance of the Host outputs.

PIN CONFIGURATION

IOCLK 1

VDD 2

48M_0/SELA 3

48M_1/SELB 4

VSS 5

VDD 6

HCLK0 7

HCLKB0 8

VSS 9

HCLK1 10

HCLKB1 11

VDD 12

HCLK2 13

HCLKB2 14

VSS 15

HCLK3 16

HCLKB3 17

VDD 18

REFCLK/SELC 19

SPREAD 20

VSS 21

XIN 22

XOUT 23

VDD 24

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

48-Pin Plastic TSSOP

0 to +70 °C

ORDER CODE

PCK2022RADGG

48 SEL100/133

47 VSS

46 VDDA

45 VSSA

44 PWRDWN

43 VDD

42 HCLK4

41 HCLKB4

40 VSS

39 HCLK5

38 HCLKB5

37 VDD

36 HCLK6

35 HCLKB6

34 VSS

33 HCLK7

32 HCLKB7

31 VDD

30 MULTSEL0

29 MULTSEL1

28 VSS

27 VSSA

26 IREF

25 VDDA

SW00665

DRAWING NUMBER

SOT362-1

Intel and Pentium III are trademarks of Intel Corporation.

2003 Jul 31

2

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