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12 Constellation.2 Serial ATA Product Manual, Rev. B
250GB drive (Standard & SED model) DC power requirements
*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and
power to operational levels.
Parameter
Voltage +5 V +12 V Power +5 V +12 V Power
Regulation (watts) (watts)
AverageIdleCurre nt 0.27 0.10 2.48 0.27 0.10 2.52
AdvancedIdleCurrent
Idle1 0.22 0.09 2.2 4 0.23 0.09 2 .29
Idle2 0.15 0.08 1.7 4 0.16 0.08 1 .79
Idle3 0.15 0.07 1.5 5 0.16 0.07 1 .59
Standb
y
0.13 0.04 1.15 0.14 0.04 1.20
AverageSleepCurrent 0.14 0.04 1.1 5 0.15 0.04 1.20
MaximumStartCurrent:
DC(PeakDC) 0.47 0.7 8 11.69 0.48 0.78 11.71
AC(PeakAC) 0 .72 1.1 5 17.37 0.70 1.15 17.26
DelayedMot orStart(DCmax) 0.14 0.04 1.18 0.15 0.04 1.23
PeakOperatingCur rent(randomread):
Typ icalDC 0.27 0.24 4.29 0.28 0.25 4.35
MaximumDC 0.27 0.25 4.33 0.28 0.25 4.39
MaximumDC(peak) 0.980.8214.740.980.8214.74
PeakOperatingCur rent(randomwrite):
Typ icalDC 0.36 0.20 4.14 0.37 0.20 4.19
MaximumDC 0.36 0.21 4.29 0.37 0.21 4.32
MaximumDC(peak) 0.900.8214.340.900.8214.34
Peakoperatingcurrent(sequentialread ):
Typ icalDC 0.58 0.11 4.22 0.59 0.11 4.28
MaximumDC 0.60 0.11 4.31 0.61 0.11 4.36
MaximumDC(peak) 0.86 0.24 7.18 0.80 0.26 7.12
Peakoperatingcurrent(sequentialwrite) :
Typ icalDC 0.73 0.11 4.98 0.74 0.11 5.03
MaximumDC 0.74 0.11 5.03 0.75 0.11 5.09
MaximumDC(peak) 0.90 0.24 7.38 0.94 0.26 7.82
ST9250610NS ST9250610NS
(3.0GB) (6.0GB)
+10/-7.5% +10/-7.5%