Seagate CHEETAH 15K.7 SAS ST3300557SS Product Manual page 27

Table 14: DC power requirements
450 GB
Voltage
Regulation
Avg idle current
Maximum starting current
(peak DC) DC
(peak AC) AC
Delayed motor start (max) DC
Peak operating current (random read):
Typical DC
Maximum DC
Maximum DC (peak)
Peak operating current (random write):
Typical DC
Maximum DC
Maximum DC (peak)
Peak operating current (sequential read):
Typical DC
Maximum DC
Maximum DC (peak)
Peak operating current (sequential write):
Typical DC
Maximum DC
Maximum DC (peak)
Cheetah 15K.7 SAS Product Manual, Rev. A
ST3450857SS
ST3450757SS
3 Gbit mode
Notes (Amps)
+5V
[5] ±5%
[1] [7] 0.39
3σ [3] 0.65
3σ [3] 0.94
3σ [1] [4] 0.54
[1][6] [1] 0.45
3σ [1] 0.48
3σ 1.28
[1][6] [1] 0.52
3σ [1] 0.56
3σ 1.24
[1][6] [1] 0.98
3σ [1] 1.04
3σ 1.36
[1][6] [1] 0.95
3σ [1] 0.99
3σ 1.26
ST3450857SS
ST3450757SS
6 Gbit mode
(Amps) (Amps) (Amps)
+12V [2] +5V +12V [2]
±5% [2] ±5% ±5% [2]
0.68 0.41 0.66
1.94 0.67 1.94
3.91 0.96 3.89
0.04 0.56 0.04
1.01 0.47 1.02
1.08 0.51 1.06
2.90 1.30 2.84
0.90 0.55 0.89
0.93 0.58 0.91
2.78 1.26 2.84
0.69 1.03 0.67
0.70 1.10 0.68
1.10 1.44 1.10
0.69 0.98 0.67
0.70 1.02 0.68
1.10 1.30 1.12
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