Hitachi IC25N040ATCS04-0 Specifications - Page 38

DC power requirements - 40gb hard drive

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6.2 DC power requirements Connection to the product should be made in a safety extra low voltage (SELV) circuits. The voltage specifications are applied at the power connector of the drive. Item Nominal supply Supply voltage Power supply ripple (0-20 MHz)1 Tolerance 2 Supply rise time Requirements +5 Volt dc -0.3 Volt to 6.0 Volt 100 mV p-p max. ±5% 7-100 ms Watts (RMS Typical) Performance Idle average 3 Active Idle average Low Power Idle average Read average 4 Write average Seek average 5 Standby Sleep Startup (maximum peak) 6 Average from power on to ready 60 GB 2.0 1.3 0.9 2.5 2.7 2.6 0.25 0.1 5.0 3.8 Models 40GB, 30 GB 1.85 0.95 0.65 2.1 2.2 2.3 0.25 0.1 4.7 3.3 20GB, 10 GB 1.85 0.85 0.65 2.0 2.1 2.3 0.25 0.1 4.7 3.3 Footnotes: 1 The maximum fixed disk ripple is measured at the 5 volt input of the drive. 2 The disk drive shall not incur damage for an over voltage condition of +25% (maximum duration of 20 ms) on the 5 volt nominal supply. 3 The idle current is specified at an inner track. 4 The read/write current is specified based on three operations of 63 sector read/write per 100 ms. 5 The seek average current is specified based on three operations per 100 ms. 6 The worst case operating current includes motor surge. Figure 20. DC Power requirements Hitachi Travelstar 60GH & 40GN hard disk drive specifications 25

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6.2 DC power requirements
Connection to the product should be made in a safety extra low voltage (SELV) circuits. The voltage
specifications are applied at the power connector of the drive.
7–100 ms
Supply rise time
±5%
Tolerance
2
100 mV p-p max.
Power supply ripple (0–20 MHz)
1
–0.3 Volt
to 6.0 Volt
Supply voltage
+5 Volt dc
Nominal supply
Requirements
Item
3.3
3.3
3.8
Average from power on to ready
4.7
4.7
5.0
Startup (maximum peak)
6
0.1
0.1
0.1
Sleep
0.25
0.25
0.25
Standby
2.3
2.3
2.6
Seek average
5
2.1
2.2
2.7
Write average
2.0
2.1
2.5
Read average
4
0.65
0.65
0.9
Low Power Idle average
0.85
0.95
1.3
Active Idle average
1.85
1.85
2.0
Performance Idle average
3
20GB, 10 GB
40GB, 30 GB
60 GB
Models
Watts (RMS Typical)
Footnotes:
1
The maximum fixed disk ripple is measured at the 5 volt input of the drive.
2
The disk drive shall not incur damage for an over voltage condition of +25% (maximum duration of
20 ms) on the 5 volt nominal supply.
3
The idle current is specified at an inner track.
4
The read/write current is specified based on three operations of 63 sector read/write per 100 ms.
5
The seek average current is specified based on three operations per 100 ms.
6
The worst case operating current includes motor surge.
Figure 20. DC Power requirements
Hitachi Travelstar 60GH & 40GN hard disk drive specifications
25