Philips Semiconductors Product data
PCK2002M0–300 MHz I
2
C 1:10 clock buffer
2
2001 Jul 19 853-2268 26745
FEATURES
• HIGH speed, LOW noise non-inverting 1:10 buffer
• Mobile (reduced pincount) version of PCK2002
• Typically used to support two SDRAM DIMMs
• 28-pin SSOP and TSSOP packages
• See PCK2002 for 48-pin 1-18 buffer part supporting up to
4 SDRAM DIMMs
• Optimized for 66 MHz, 100 MHz and 133 MHz operation
• Multiple V
DD
and V
SS
pins for noise reduction
• Spread spectrum compliant
• 175 ps skew outputs
• Individual clock output enable/disable via I
2
C
DESCRIPTION
The PCK2002M is a 1–10 fanout buffer used for 133/100 MHz CPU,
66/33 MHz PCI, 14.318 MHz REF, or 133/100/66 MHz SDRAM
clock distribution. 10 outputs are typically used to support up to
2 SDRAM DIMMs commonly found in laptop or mobile applications.
The PCK2002M has the same features and operating characteristics
of the PCK2002 and is available in the SSOP 28 pin package.
All clock outputs meet Intel’s drive, rise/fall time, accuracy, and skew
requirements. An I
2
C interface is included to allow each output to be
enabled/disabled individually. An output disabled via the I
2
C
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
t
PLH
t
PHL
Propagation delay
BUF_IN to BUF_OUT
n
V
CC
= 3.3 V, CL = 30 pF
2.7
2.9
ns
t
r
Rise time V
CC
= 3.3 V, CL = 30 pF 1.1 ns
t
f
Fall time V
CC
= 3.3 V, CL = 30 pF 1.0 ns
I
CC
Total supply current V
CC
= 3.465 V 35 µA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DRAWING NUMBER
28-Pin Plastic SSOP 0 to +70 °C PCK2002MDB SOT341–1
28-Pin Plastic TSSOP 0 to +70 °C PCK2002MPW SOT361–1
PIN CONFIGURATION
3
4
5
6
7
8
9
10
11
12 17
18
19
20
21
22
23
24
25
26
BUF_OUT1
V
SS0
V
DD1
BUF_OUT2
BUF_OUT3
V
SS1
BUF_IN
V
DD4
BUF_OUT16 BUF_OUT17
V
SS4
V
DD5
OE
V
SS8
BUF_OUT12
BUF_OUT13
V
DD8
V
SS9
BUF_OUT14
V
SS5
13 16V
DDI2C
V
SSI2C
14 15SDA
SCL
TOP VIEW
1
227
28
V
DD0
BUF_OUT0 BUF_OUT15
V
DD9
SA00550
PCK2002M
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
2, 3, 6, 7 Output
BUF_OUT
(0–3)
Buffered clock outputs
22, 23, 26,
27
Output
BUF_OUT
(12–15)
Buffered clock outputs
11, 18 Output
BUF_OUT
(16–17)
Buffered clock outputs
9 Input BUF_IN Buffered clock input
20 Input OE
Active high output
enable
14 I/O SDA I
2
C serial data
15 Input SCL I
2
C serial clock
1, 5, 10,
19, 24, 28
Input V
DD
(0,1,4,5,8,9)
3.3 V power supply
4, 8, 12,
17, 21, 25
Input V
SS
(0,1,4,5,8,9)
Ground
13 Input V
DDI2C
3.3 V I
2
C power supply
16 Input V
DDI2C
I
2
C ground
