PCK2002DGG datasheet(2/12 Pages) PHILIPS

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Philips Semiconductors

Product data

PCK2002

0–300 MHz I2C 1:18 clock buffer

2001 Jul 19

853-2267 26745

FEATURES

• HIGH speed, LOW noise non-inverting 1–18 buffer

• Typically used to support four SDRAM DIMMs

• Multiple V

DD, VSS pins for noise reduction

• 3.3 V operation

• Separate 3-State pin for testing

• ESD protection exceeds 2000 V per Standard 801.2

• Optimized for 66 MHz, 100 MHz and 133 MHz operation

• Typical 175 ps skew outputs

• Available in 48-pin SSOP and TSSOP packages

• See PCK2002M for mobile (reduced pincount) 28-pin 1-10 buffer

version

• Spread spectrum compliant

• Individual clock output enable/disable via I2C

DESCRIPTION

The PCK2002 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

requirements. An I2C interface is included to allow each output to be

enabled/disabled individually. An output disabled via the I2C

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

tPLH

tPHL

Propagation delay

BUF_IN to BUF_OUTn

VCC = 3.3 V, CL = 30 pF

2.7

2.9

Rise time

VCC = 3.3 V, CL = 30 pF

1.1

Fall time

VCC = 3.3 V, CL = 30 pF

1.0

ICC

Total supply current

VCC = 3.465 V

µA

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

DRAWING NUMBER

48-Pin Plastic TSSOP

0 to +70

°C

PCK2002DGG

SOT362-1

48-Pin Plastic SSOP

0 to +70

°C

PCK2002DL

SOT370-1

PIN CONFIGURATION

RESERVED

VDD0

BUF_OUT0

BUF_OUT1

VSS0

VDD1

BUF_OUT3

BUF_OUT2

VSS1

BUF_IN

VDD2

BUF_OUT4

BUF_OUT5

VSS2

VDD3

BUF_OUT6

BUF_OUT7

VSS3

VDD4

BUF_OUT16

VSS4

VDDI2C

SDA

RESERVED

VDD9

BUF_OUT15

BUF_OUT14

VSS9

VDD8

BUF_OUT13

BUF_OUT12

VSS8

VDD7

BUF_OUT11

BUF_OUT10

VSS7

VDD6

BUF_OUT9

BUF_OUT8

VSS6

VDD5

BUF_OUT17

VSS5

VSSI2C

SCL

SW00731

I2C is a trademark of Philips Semiconductors Corporation.

PIN DESCRIPTION

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,

Output

BUF_OUT

(8–11)

Buffered clock outputs

40, 41, 44,

Output

BUF_OUT

(12–15)

Buffered clock outputs

21, 28

Output

BUF_OUT

(16–17)

Buffered clock outputs

Input

BUF_IN

Buffered clock input

Input

Active high output

enable

I/O

SDA

I2C serial data

Input

SCL

I2C serial clock

3, 7, 12, 16,

20, 29, 33,

37, 42, 46

Input

VDD (0–9)

3.3 V Power supply

6, 10, 15,

19, 22,

27, 30, 34,

39, 43

Input

VSS (0–9)

Ground

Input

VDDI2C

3.3 V I2C Power

supply

Input

VSSI2C

I2C Ground

1, 2, 47, 48

n/a

RESERVED

Undefined

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