Seagate Barracuda ST11950N, Product Manual

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70 Barracuda 1 and 2 Product Manual, Rev. C
SCSI devices providing terminator power (TERMPWR) must have the
following characteristics:
• V TERM = 4.50V to 5.25V
• 800 mA minimum source drive capability
• 1.0A maximum
ST11950ND, ST11950WD, ST12550ND and ST12550WD drives
You can configure terminator power only from the drive to the SCSI bus (see
Section 10.1).
11.8 SCSI non-wide physical interface
1 2 3 4
.100
(2.54)
"D"
±
.010
Typ.
.045
(1.14)
"C"
±
.010
"B" Ref.
"A"
±
.010
.834
±
.010
(21.18)
Min. Typ. 3
.051
(1.30)
.16
(4.06)
.100
(2.54)
.025
(.64)
Sq. Contact
50 Places
CL
.040
(1.02)
Ref.
.335
±
.010
(8.50)
+.001
–.002
Dia.
.083
(2.1)
Trifurcated Pin
(4 places)
.26
(6.60)
Typ.
.065
(1.65)
x 45
°
Chamfer Typ.
.20
(5.08)
Typ.
.60
(15.24)
.42
(10.67)
Ref.
No. Pos.
50
"A"
3.767
(95.68)
"B"
3.697
(93.90)
"C"
2.720
(69.09)
"D"
2.400
(60.96)
.037 Ref. Typ.
(.94)
.370
±
.010
(9.398)
Pin 1
Figure 27. Non-shielded SCSI device connector