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參數(shù)資料
| 型號： | 935260580118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 時鐘及定時 |
| 英文描述： | LOW SKEW CLOCK DRIVER, 18 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO48 |
| 封裝： | 7.50 MM, PLASTIC, MO-118, SOT-370-1, SSOP-48 |
| 文件頁數(shù)： | 2/6頁 |
| 文件大?。?/td> | 101K |
| 代理商： | 935260580118 |
Philips Semiconductors
Product data
PCK2001
14.318–150 MHz I2C 1:18 clock buffer
2
2002 Jun 03
853-2072 28362
FEATURES
HIGH speed, LOW noise non-inverting 1–18 buffer
Typically used to support four SDRAM DIMMs
Multiple V
DD, 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
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
48-Pin Plastic SSOP
0
°C to +70 °C
PCK2001DL
SOT370-1
PIN CONFIGURATION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
21
22
23
24
41
42
43
44
45
46
47
48
RESERVED
VDD0
BUF_OUT0
BUF_OUT1
VSS0
VDD1
BUF_OUT3
BUF_OUT2
VSS1
BUF_IN
VDD2
BUF_OUT4
BUF_OUT5
VSS2
VDD3
BUF_OUT6
BUF_OUT7
VSS3
VDD4
BUF_OUT16
VSS4
VDDI2C
SDA
RESERVED
VDD9
BUF_OUT15
BUF_OUT14
VSS9
VDD8
BUF_OUT13
BUF_OUT12
VSS8
OE
VDD7
BUF_OUT11
BUF_OUT10
VSS7
VDD6
BUF_OUT9
BUF_OUT8
VSS6
VDD5
BUF_OUT17
VSS5
VSSI2C
SCL
SW00567
PCK2001
I2C is a trademark of Koninklijke Philips Electronics N.V.
PIN DESCRIPTION
PIN
NUMBER
I/O
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,
34, 39, 43
Input
VSS (0–9)
Ground
23
Input
VDDI2C
3.3 V I2C power
supply
26
Input
VSSI2C
I2C ground
1, 2, 47, 48
n/a
RESERVED
Undefined
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