5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
SLOT3_RCLKp
SLOT3_RCLKn
RCLKp
RCLKn
SLOT1_RCLKp
SLOT1_RCLKn
SLOT2_RCLKp
SLOT2_RCLKn
ST0_RCLKp
ST0_RCLKn
ST1_RCLKp
ST1_RCLKn
ST2_RCLKp
ST2_RCLKn
Deneb_C_REFCLKp
DNB_RCLKp
Deneb_C_REFCLKn
DNB_RCLKn
REFCLK_INp
REFCLK_INn
Station0_REFCLKp
Station0_REFCLKn
3.3V_BOARD
3.3V_BOARD
3.3V_BOARD
3.3V_BOARD
3.3V_BOARD
Slot2_REFCLKp
{8}
Slot2_REFCLKn
{8}
Slot1_REFCLKn
{8}
Slot1_REFCLKp
{8}
Slot3_REFCLKp
{8}
Slot3_REFCLKn
{8}
Station2_REFCLKn
{14}
Station2_REFCLKp
{14}
Deneb_REFCLKn
{3}
Deneb_REFCLKp
{3}
Station1_REFCLKp
{14}
Station1_REFCLKn
{14}
PERST#
{15}
Title
Size
Document Number
Rev
Date:
Sheet
of
91-0082-100-A
102
PEX8648 RDK - REFCLK Fanout 1
PLX Technology, Inc.
870 W. Maude Avenue
Sunnyvale, CA 94085
www.plxtech.com
C
13
21
Tuesday, November 16, 2010
Title
Size
Document Number
Rev
Date:
Sheet
of
91-0082-100-A
102
PEX8648 RDK - REFCLK Fanout 1
PLX Technology, Inc.
870 W. Maude Avenue
Sunnyvale, CA 94085
www.plxtech.com
C
13
21
Tuesday, November 16, 2010
Title
Size
Document Number
Rev
Date:
Sheet
of
91-0082-100-A
102
PEX8648 RDK - REFCLK Fanout 1
PLX Technology, Inc.
870 W. Maude Avenue
Sunnyvale, CA 94085
www.plxtech.com
C
13
21
Tuesday, November 16, 2010
REFCLK FANOUT CIRCUIT TO PCIe SWITCH
REFCLK FANOUT CIRCUIT TO STATION 0 SLOTS
R87, R88, R89, R90 SHOULD BE CLOSE TO U4 PINS 9 AND 10
R93, R95, R99, R101 SHOULD BE CLOSE TO U4 PINS 20 AND 19
R82, R83, R84, R85 SHOULD BE CLOSE TO U4 PINS 6 AND 7
R104, R105, R106 AND R107 SHOULD BE CLOSE TO U4 PINS 23 AND 22
These are custom 0603 resistor
footprints that have 3 pads.
2
1
3
R143, R59, R60, R61 SHOULD BE CLOSE TO U3 PINS 9 AND 10
R66, R68, R72, R74 SHOULD BE CLOSE TO U3 PINS 20 AND 19
R51, R52, R53, R54 SHOULD BE CLOSE TO U3 PINS 6 AND 7
R77, R78, R79, R80 SHOULD BE CLOSE TO U3 PINS 23 AND 22
These are custom 0603 resistor
footprints that have 3 pads.
2
1
3
A ferrite bead can
be used in place of
0-ohm resistor for
additional
filtering.
A ferrite bead can
be used in place of
0-ohm resistor for
additional
filtering.
R106
49.9
1%
R106
49.9
1%
R96
0 Shunt
R96
0 Shunt
1
2
3
C128
0.01uF
C128
0.01uF
U3
CY28400-2
U3
CY28400-2
VD
D
1
VD
D
5
VD
D
11
VD
D
18
VD
D
24
VSS
4
OE_INV
25
V
DD_A
28
VSS_
A
27
SRC_IN
2
SRC_IN#
3
OE_1
8
OE_6
21
HIGH_BW#
17
SRC_STP
16
PWRDWN
15
SCLK
13
SDATA
14
IREF
26
PLL/BYPASS#
12
DIFT1
6
DIFC1
7
DIFT2
9
DIFC2
10
DIFT5
20
DIFC5
19
DIFT6
23
DIFC6
22
R66
33.2
1%
R66
33.2
1%
R85
49.9
1%
R85
49.9
1%
R67
5.1K
R67
5.1K
C124
0.1uF
C124
0.1uF
U4
CY28400-2
U4
CY28400-2
VD
D
1
VD
D
5
VD
D
11
VD
D
18
VD
D
24
VSS
4
OE_INV
25
V
DD_A
28
VSS_
A
27
SRC_IN
2
SRC_IN#
3
OE_1
8
OE_6
21
HIGH_BW#
17
SRC_STP
16
PWRDWN
15
SCLK
13
SDATA
14
IREF
26
PLL/BYPASS#
12
DIFT1
6
DIFC1
7
DIFT2
9
DIFC2
10
DIFT5
20
DIFC5
19
DIFT6
23
DIFC6
22
C130
0.01uF
C130
0.01uF
R59
33.2
1%
R59
33.2
1%
C123
10uF
C123
10uF
2
1
5
3
4
6
R94
5.1K
R94
5.1K
R89
49.9
1%
R89
49.9
1%
R56
10K
R56
10K
R71
0 Shunt
R71
0 Shunt
1
2
3
R74
49.9
1%
R74
49.9
1%
R143
33.2
1%
R143
33.2
1%
C132
0.1uF
C132
0.1uF
C121
0.01uF
C121
0.01uF
R98
0 Shunt
R98
0 Shunt
1
2
3
R54
49.9
1%
R54
49.9
1%
R79
49.9
1%
R79
49.9
1%
R75
5.1K
R75
5.1K
R88
33.2
1%
R88
33.2
1%
R65
0 Shunt
R65
0 Shunt
1
2
3
R101
49.9
1%
R101
49.9
1%
R104
33.2
1%
R104
33.2
1%
R102
5.1K
R102
5.1K
R73
5.1K
R73
5.1K
R64
5.1K
R64
5.1K
J16
SMT_SMA
J16
SMT_SMA
S
1
G
2
G
3
R82
33.2
1%
R82
33.2
1%
R100
5.1K
R100
5.1K
R91
5.1K
R91
5.1K
R92
0 Shunt
R92
0 Shunt
1
2
3
R77
33.2
1%
R77
33.2
1%
R69
5.1K
R69
5.1K
C126
0.1uF
C126
0.1uF
R93
33.2
1%
R93
33.2
1%
R97
5.1K
R97
5.1K
R68
33.2
1%
R68
33.2
1%
C129
0.01uF
C129
0.01uF
R84
49.9
1%
R84
49.9
1%
R61
49.9
1%
R61
49.9
1%
C127
0.01uF
C127
0.01uF
R107
49.9
1%
R107
49.9
1%
C120
0.01uF
C120
0.01uF
R62
1.0K
R62
1.0K
R72
49.9
1%
R72
49.9
1%
R51
33.2
1%
R51
33.2
1%
J15
SMT_SMA
J15
SMT_SMA
S
1
G
2
G
3
R90
49.9
1%
R90
49.9
1%
R76
475
1%
R76
475
1%
R99
49.9
1%
R99
49.9
1%
R105
33.2
1%
R105
33.2
1%
P4
SATA header
P4
SATA header
GND
1
A+
2
A-
3
GND
4
B-
5
B+
6
GND
7
R80
49.9
1%
R80
49.9
1%
R103
475
1%
R103
475
1%
R87
33.2
1%
R87
33.2
1%
C122
0.01uF
C122
0.01uF
R53
49.9
1%
R53
49.9
1%
R57
5.1K
R57
5.1K
R63
1.0K
R63
1.0K
R83
33.2
1%
R83
33.2
1%
R78
33.2
1%
R78
33.2
1%
C119
0.01uF
C119
0.01uF
C125
0.1uF
C125
0.1uF
R50
0
R50
0
C131
10uF
C131
10uF
2
1
5
3
4
6
R52
33.2
1%
R52
33.2
1%
R86
5.1K
R86
5.1K
R95
33.2
1%
R95
33.2
1%
R81
0
R81
0
R70
0 Shunt
R70
0 Shunt
1
2
3
R60
49.9
1%
R60
49.9
1%
R55
10K
R55
10K