Philips Semiconductors

Product specification

PCK2022R

CK00 (100/133 MHz) spread spectrum

differential system clock generator

2

2000 Nov 13

853–2225 25005

FEATURES

DESCRIPTION

The PCK2022R is a clock synthesizer/driver for a Pentium III

™ and

other similar processors

The PCK2022R 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

1

2

3

4

5

6

7

8

9

10

11

12

37

38

39

40

41

42

43

44

45

46

47

48

IOCLK

48M_0/SELA

48M_1/SELB

HCLK0

HCLKB0

HCLK1

HCLKB1

SEL100/133

PWRDWN

HCLK4

HCLKB4

HCLK5

HCLKB5

13

14

15

16

17

18

31

32

33

34

35

36

HCLK2

HCLKB2

HCLK3

HCLKB3

HCLK6

HCLKB6

HCLK7

HCLKB7

19

30

REFCLK/SELC

20

21

22

23

24

25

26

27

28

29

SPREAD

XIN

XOUT

MULTSEL0

MULTSEL1

SW00665

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

DRAWING NUMBER

48-Pin Plastic TSSOP

0

°C to +70°C

PCK2022R DGG

SOT362-1

Intel and Pentium III are trademarks of Intel Corporation.