
Philips Semiconductors
Product specification
PCK2001M
14.318–150 MHz I2C 1:10 clock buffer
2
2000 May 17
853-2120 23685
FEATURES
Mobile (reduced pincount) version of PCK2001
Typically used to support 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 66 MHz, 100 MHz and 133 MHz operation
175 ps skew outputs
Individual clock output enable/disable via I2C
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
tPLH
tPHL
Propagation delay
BUF_IN to BUF_OUTn
VCC = 3.3 V, CL = 30 pF
2.5
ns
tr
Rise time
VCC = 3.3 V, CL = 30 pF
1.0
ns
tf
Fall time
VCC = 3.3 V, CL = 20 pF
700
ps
ICC
Total supply current
VCC = 3.465 V
50
A
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
VSS0
VDD1
BUF_OUT2
BUF_OUT3
VSS1
BUF_IN
VDD4
BUF_OUT16
BUF_OUT17
VSS4
VDD5
OE
VSS8
BUF_OUT12
BUF_OUT13
VDD8
VSS9
BUF_OUT14
VSS5
13
16
VDDI2C
VSSI2C
14
15
SDA
SCL
TOP VIEW
1
227
28
VDD0
BUF_OUT0
BUF_OUT15
VDD9
SA00447
PCK2001M
Intel and Pentium are registered trademarks of Intel Corporation.
I2C 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
I2C serial data
15
Input
SCL
I2C serial clock
1, 5, 10,
19, 24, 28
Input
VDD (0,1,4,5,8,9)
3.3 V power supply
4, 8, 12,
17, 21, 25
Input
VSS (0,1,4,5,8,9)
Ground
13
Input
VDDI2C
3.3 V I2C power supply
16
Input
VDDI2C
I2C ground