SFP Electrical Pad Layout
The SFP Transceiver contains a printed circuit board that mates with the SFP electrical host connector. The
pads are designed for a sequenced mating:
First mate – ground contacts
Second mate – power contacts
Third mate – signal contacts
The design of the mating portion of the SFP Transceiver printed circuit board is illustrated in Figure 4.
1
2
3
4
5
6
7
8
9
10
VEE
VEE
TX_DIS
MOD_DEF[2]
MOD_DEF[1]
MOD_DEF[0]
NC (RATE)
LOS
VEE
20
VEE
19
TD-
18
TD+
17
VEE
16
VCC
15
VCC
14
VEE
13
RD+
12
RD-
11
VEE
Top of Board
VEE
Bottom of Board
(As viewed thru top of board)
Bottom of Board
(As viewed thru top of board)
PIN 20
PIN 1
SFP Rear View
Figure 4: SFP Electrical Pad Layout