Philips Semiconductors Product specification
PCK2001M14.318–150 MHz I
2
C 1:10 Clock Buffer
2
1999 Jul 06 853-2120 21924
FEATURES
• Mobile (reduced pincount) version of PCK2001
• Typically used to two SDRAM DIMMs
• 28 pin SSOP package
• Same general features as PCK2001
• See PCK2001 for 48-pin 1-18 buffer part supporting up to 4
SDRAM DIMMs
• Optimized for 66MHz, 100MHz and 133MHz operation
• 175 ps skew outputs
• Individual clock output enable/disable via I
2
C
DESCRIPTION
The PCK2001M 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
PCK2001M has the same features and operating characteristics of
the PCK2001 and is available in the SSOP 28 pin package.
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS TYPICAL UNIT
t
PLH
t
PHL
Propagation delay
BUF_IN to BUF_OUT
n
V
CC
= 3.3V, CL = 30pF
2.5
2.5
ns
t
r
Rise time V
CC
= 3.3V, CL = 30pF 1.0 ns
t
f
Fall time V
CC
= 3.3V, CL = 20pF 700 ps
I
CC
Total supply current V
CC
= 3.465V 50 µA
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE ORDER CODE DRAWING NUMBER
28-Pin Plastic SSOP 0°C to +70°C PCK2001M DB SOT341–1
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 15S
DA
S
CL
TOP VIEW
1
227
28
V
DD0
BUF_OUT0 BUF_OUT15
V
DD9
SA00447
PCK2001M
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 ouput 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
(0–9)
3.3V power supply
4, 8, 12, 17,
21, 25
Input V
SS
(0–9)
Ground
13 Input V
DDI2C
3.3V I
2
C power supply
16 Input V
DDI2C
I
2
C ground
