11.4.6 Sas Transmitters And Receivers; Figure 27. Sas Transmitters And Receivers - Seagate ST400FM0093 Product Manual

Table 24 Micro SAS pin descriptions
Pin Signal name
S1 Port A Ground
S2* +Port A_in
S3* -Port A_in
S4 Port A Ground
S5* -Port A_out
S6* +Port A_out
S7 Port A Ground
S8 Port B Ground
S9* +Port B_in
S10* -Port B_in
S11 Port B Ground
S12* -Port B_out
S13* +Port B_out
S14 Port B Ground
* - Short pin to support hot plugging
NC - No connection in the drive.

11.4.6 SAS transmitters and receivers

A typical SAS differential copper transmitter and receiver pair is shown in Figure 27. The receiver is AC coupling to eliminate
ground shift noise.

Figure 27. SAS transmitters and receivers

Seagate 1200 SSD Product Manual, Rev. C
Signal type Pin
P1*
Diff. input pair P2
P3
P4
Diff output pair P5
P6*
P7*
P8*
Diff. input pair P9*
A1*
Diff output pair A2*
Signal name
3.3 Volts
3.3 Volts charge
Ground
Ground
5 Volts charge
5 Volts
Reserved
NC (reserved for Manufacturing diagnostic)
NC (reserved for Manufacturing diagnostic)
Vendor specific
Vendor specific
Signal type
75