Philips Semiconductors

Product specification

PCK2001

2

1999 Jul 06

853-2072 21924

FEATURES

version

DESCRIPTION

The PCK2001 is a 1–18 fanout buffer used for 133/100 MHz CPU,

66/33 MHz PCI, 14.318 MHz REF, or 133/100/66 MHz SDRAM

clock distribution. 18 outputs are typically used to support up to 4

SDRAM DIMMS commonly found in desktop, workstation or server

applications.

All clock outputs meet Intel’s drive, rise/fall time, accuracy, and skew

interface will be held in the LOW state. In addition, there is an OE

input which 3-States all outputs.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

Propagation delay

2.5

2.5

ns

Rise time

1.0

ns

Fall time

700

ps

Total supply current

50

µA

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

DRAWING NUMBER

48-Pin Plastic SSOP

0

°C to +70°C

PCK2001 DL

SOT370-1

PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

21

22

23

24

41

42

43

44

45

46

47

48

RESERVED

RESERVED

BUF_OUT0

BUF_OUT1

BUF_OUT3

BUF_OUT2

BUF_IN

BUF_OUT4

BUF_OUT5

BUF_OUT6

BUF_OUT7

BUF_OUT16

SDA

RESERVED

RESERVED

BUF_OUT15

BUF_OUT14

BUF_OUT13

BUF_OUT12

OE

BUF_OUT11

BUF_OUT10

BUF_OUT9

BUF_OUT8

BUF_OUT17

SCL

SW00248

PIN DESCRIPTION

PIN

NUMBER

I/O

TYPE

SYMBOL

FUNCTION

4, 5, 8, 9

Output

BUF_OUT (0–3)

Buffered clock outputs

13, 14, 17,

18

Output

BUF_OUT (4–7)

Buffered clock outputs

31, 32, 35,

36

Output

BUF_OUT

(8–11)

Buffered clock outputs

40, 41, 44,

45

Output

BUF_OUT

(12–15)

Buffered clock outputs

21, 28

Output

BUF_OUT

(16–17)

Buffered clock outputs

11

Input

BUF_IN

Buffered clock input

38

Input

OE

Active high output

enable

24

I/O

SDA

25

Input

SCL

3, 7, 12, 16,

20, 29, 33,

37, 42, 46

Input

3.3V Power supply

6, 10, 15,

19, 22,

27, 30, 34,

39, 43

Input

Ground

23

Input

supply

26

Input