PCK2001 データシートの表示（PDF） - Philips Electronics
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PCK2001 Datasheet PDF : 14 Pages
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Philips Semiconductors
14.318–150 MHz I2C 1:18 clock buffer
Product data
PCK2001
FEATURES
• HIGH speed, LOW noise non-inverting 1–18 buffer
• Typically used to support four SDRAM DIMMs
• Multiple VDD, VSS pins for noise reduction
• 3.3 V operation
• Separate 3-State pin for testing
• ESD protection exceeds 2000 V per Standard 801.2
• Optimized for 66 MHz, 100 MHz and 133 MHz operation
• 175 ps skew outputs
• Available in 48-pin SSOP package
• See PCK2001M for mobile (reduced pincount) 28-pin 1-10 buffer
version
• Individual clock output enable/disable via I2C
DESCRIPTION
The PCK2001 is a 1–18 fanout buffer used for 133/100 MHz CPU,
66/33 MHz PCI, 14.318 MHz REF, or 133/100/66 MHz SDRAM clock
distribution. 18 outputs are typically used to support up to four
SDRAM DIMMS commonly found in desktop, workstation or server
applications.
All clock outputs meet Intel’s drive, rise/fall time, accuracy, and skew
requirements. An I2C interface is included to allow each output to be
enabled/disabled individually. An output disabled via the I2C
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
tPLH
Propagation delay
tPHL
BUF_IN to BUF_OUTn
tr
Rise time
tf
Fall time
ICC
Total supply current
CONDITIONS
VCC = 3.3 V; CL = 30 pF
VCC = 3.3 V, CL = 30 pF
VCC = 3.3 V, CL = 20 pF
VCC = 3.465 V
TYPICAL
2.5
2.5
1.0
700
50
UNIT
ns
ns
ps
µA
ORDERING INFORMATION
PACKAGES
48-Pin Plastic SSOP
TEMPERATURE RANGE
0 °C to +70 °C
ORDER CODE
PCK2001DL
DRAWING NUMBER
SOT370-1
PIN CONFIGURATION
RESERVED 1
RESERVED 2
VDD0 3
BUF_OUT0 4
BUF_OUT1 5
VSS0 6
VDD1 7
BUF_OUT2 8
BUF_OUT3 9
VSS1 10
BUF_IN 11
VDD2 12
BUF_OUT4 13
BUF_OUT5 14
VSS2 15
VDD3 16
BUF_OUT6 17
BUF_OUT7 18
VSS3 19
VDD4 20
BUF_OUT16 21
VSS4 22
VDDI2C 23
SDA 24
48 RESERVED
47 RESERVED
46 VDD9
45 BUF_OUT15
44 BUF_OUT14
43 VSS9
42 VDD8
41 BUF_OUT13
40 BUF_OUT12
39 VSS8
38 OE
37 VDD7
36 BUF_OUT11
35 BUF_OUT10
34 VSS7
33 VDD6
32 BUF_OUT9
31 BUF_OUT8
30 VSS6
29 VDD5
28 BUF_OUT17
27 VSS5
26 VSSI2C
25 SCL
SW00567
I2C is a trademark of Koninklijke Philips Electronics N.V.
PIN DESCRIPTION
PIN
I/O
NUMBER TYPE
SYMBOL
FUNCTION
4, 5, 8, 9 Output BUF_OUT (0–3) Buffered clock outputs
13, 14, 17, 18 Output BUF_OUT (4–7) Buffered clock outputs
31, 32, 35,
36
Output
BUF_OUT
(8–11)
Buffered clock outputs
40, 41, 44,
45
Output
BUF_OUT
(12–15)
Buffered clock outputs
21, 28
Output
BUF_OUT
(16–17)
Buffered clock outputs
11
Input
BUF_IN
Buffered clock input
38
Input
OE
Active-HIGH output
enable
24
I/O
SDA
I2C serial data
25
Input
SCL
I2C serial clock
3, 7, 12, 16,
20, 29, 33,
37, 42, 46
Input
VDD (0–9)
3.3 V power supply
6, 10, 15, 19,
22, 27, 30, Input
34, 39, 43
23
Input
26
1, 2, 47, 48
Input
n/a
VSS (0–9)
VDDI2C
VSSI2C
RESERVED
Ground
3.3 V I2C power
supply
I2C ground
Undefined
2002 Jun 03
2
853-2072 28362
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