11
Avago Technologies Confidential
Transceiver Contact Assignment and Signal Description
There are 21 pads per level, for a total of 84, with 48 pads allocated for (12+12) differential pairs, 28 for Signal Common
or Ground (GND), 4 for power connections, 4 for control/service.
Bottom side
Top Side
I/O #
Name
Contact
Length
Contact
Length
Name
I/O #
Receiver -- Top Card
C1
GND
Car
d
Ed
ge
GND
D1
C2
Rx1p
Rx0p
D2
C3
Rx1n
Rx0n
D3
C4
GND
GND
D4
C5
Rx3p
Rx2p
D5
C6
Rx3n
Rx2n
D6
C7
GND
GND
D7
C8
Rx5p
Rx4p
D8
C9
Rx5n
Rx4n
D9
C10
GND
GND
D10
C11
Rx7p
Rx6p
D11
C12
Rx7n
Rx6n
D12
C13
GND
GND
D13
C14
Rx9p
Rx8p
D14
C15
Rx9n
Rx8n
D15
C16
GND
GND
D16
C17
Rx11p
Rx10p
D17
C18
Rx11n
Rx10n
D18
C19
GND
GND
D19
C20
PRSNT_L
Vcc3.3-Rx
D20
C21
Int_L/Reset_L
Not used
D21
Transmitter -- Bottom Card
A1
GND
Car
d
Ed
ge
GND
B1
A2
Tx1p
Tx0p
B2
A3
Tx1n
Tx0n
B3
A4
GND
GND
B4
A5
Tx3p
Tx2p
B5
A6
Tx3n
Tx2n
B6
A7
GND
GND
B7
A8
Tx5p
Tx4p
B8
A9
Tx5n
Tx4n
B9
A10
GND
GND
B10
A11
Tx7p
Tx6p
B11
A12
Tx7n
Tx6n
B12
A13
GND
GND
B13
A14
Tx9p
Tx8p
B14
A15
Tx9n
Tx8n
B15
A16
GND
GND
B16
A17
Tx11p
Tx10p
B17
A18
Tx11n
Tx10n
B18
A19
GND
GND
B19
A20
SCL
Vcc3.3-Tx
B20
A21
SDA
Not used
B21