PCK2001RDB datasheet(2/12 Pages) PHILIPS

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Philips Semiconductors

Product specification

PCK2001R

14.318 – 133 MHz I2C 1:6 clock buffer

2000 Jul 25

853-2210 24202

FEATURES

• Typically used to support four registered SDRAM DIMMs

• 16-pin SSOP package

• See PCK2001 for 48-pin 1:18 buffer part

• See PCK2001M for 28-pin 1:10 buffer part

• Optimized for 33 MHz, 66 MHz, 100 MHz and 133 MHz operation

• Part-to-part skew < 500 ps

• 175 ps skew outputs typical

• Individual SDRAM clock output enable/disable via I2C

• Multiple V

DD, VSS pins for noise reduction

• 3.3 V operation

• ESD protection exceeds 2000 V per Standard 801.2

DESCRIPTION

The PCK2001R is a 1–6 fanout buffer used for 133/100 MHz CPU,

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

distribution. 6 outputs are typically used to support up to 4 registered

SDRAM DIMMs commonly found in server applications.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

tPLH

tPHL

Propagation delay

BUF_IN to BUF_OUTn

VCC = 3.3 V, CL = 30 pF

2.5

Rise time

VCC = 3.3 V, CL = 30 pF

1.0

Fall time

VCC = 3.3 V, CL = 20 pF

700

ICC

Total supply current

VCC = 3.465 V

µA

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

DRAWING NUMBER

16-Pin Plastic SSOP

°C to +70°C

PCK2001RDB

SOT369-1

PIN CONFIGURATION

VSS0

BUF_OUT2

BUF_IN

BUF_OUT7

BUF_OUT17

VSS

VDD5

BUF_OUT11

VSS9

VDDI2C

VSSI2C

SDA

SCL

TOP VIEW

215

BUF_OUT0

BUF_OUT14

VDD9

SA00542

Intel and Pentium are registered trademarks of Intel Corporation.

I2C is a trademark of Philips Semiconductors Corporation.

PIN DESCRIPTION

NUMBER

I/O

TYPE

SYMBOL

FUNCTION

1, 3

Output

BUF_OUT

(0, 2)

Buffered clock outputs

13, 15

Output

BUF_OUT

(11, 14)

Buffered clock outputs

6, 11

Output

BUF_OUT

(7, 17)

Buffered clock outputs

Input

BUF_IN

Buffered clock input

I/O

SDA

I2C serial data

Input

SCL

I2C serial clock

12, 16

Input

VDD

(5, 9)

3.3 V power supply

2, 14

Input

VSS

(0, 9)

Ground

Input

VDDI2C

3.3 V I2C power supply

Input

VSSI2C

I2C ground

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