Philips Semiconductors Product specification
PCK2001R14.318 – 133 MHz I
2
C 1:6 clock buffer
2
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 I
2
C
• Multiple V
DD
, V
SS
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
t
PLH
t
PHL
Propagation delay
BUF_IN to BUF_OUT
n
V
CC
= 3.3 V, CL = 30 pF
2.5
2.5
ns
t
r
Rise time V
CC
= 3.3 V, CL = 30 pF 1.0 ns
t
f
Fall time V
CC
= 3.3 V, CL = 20 pF 700 ps
I
CC
Total supply current V
CC
= 3.465 V 50 µA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DRAWING NUMBER
16-Pin Plastic SSOP 0°C to +70°C PCK2001RDB SOT369-1
PIN CONFIGURATION
3
4
5
6
7
89
10
11
12
13
14
V
SS0
BUF_OUT2
BUF_IN
BUF_OUT7
BUF_OUT17
V
SS
V
DD5
BUF_OUT11
V
SS9
V
DDI
2
C
V
SSI
2
C
SDA SCL
TOP VIEW
1
215
16
BUF_OUT0
BUF_OUT14
V
DD9
SA00542
PCK2001R
Intel and Pentium are registered trademarks of Intel Corporation.
I
2
C is a trademark of Philips Semiconductors Corporation.
PIN DESCRIPTION
PIN
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
4 Input BUF_IN Buffered clock input
8 I/O SDA I
2
C serial data
9 Input SCL I
2
C serial clock
12, 16 Input
V
DD
(5, 9)
3.3 V power supply
2, 14 Input
V
SS
(0, 9)
Ground
7 Input V
DDI
2
C
3.3 V I
2
C power supply
10 Input V
SSI
2
C
I
2
C ground
