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Chapter 1 41
AC Adaptor
Hard Disk Drive
Item Specification
Model name LiteOn PA-1900-04AW Delta 90W ADP-90SB BBAA
Input feature
Rated voltage for 100Vac or 240Vac input AC
voltage
for 100Vac or 240Vac input AC
voltage
Input voltage range from 90Vac to 264Vac from 90Vac to 265Vac
Rated frequency for 50Hz or 60Hz for 50Hz or 60Hz
Frequency range from 47Hz to 63Hz from 47Hz to 63Hz
Steady AC current less than 1.5A rms at 100Vac input
and maximum load
less than 1.5A rms at 100Vac input
and maximum load
Output feature
Rated voltage 19V 19V
Voltage range 18.05V to 20V from 18.2V to 19.8V
Rated power 90 W 90 W
Output ripple and noise less than 300mVp-p less than 300mVp-p
Turn on delay time within two seconds at 115 Vac input
voltage
within two seconds at 115 Vac input
voltage
Temperature
Operating: 0 to 40
o
C
Non-operating: -31 to 60
o
C
Operating: 0 to 40
o
C
Non-operating: -31 to 60
o
C
Seagate
Model ST9120821A
ST9120824A
ST9100824A
ST9100825A
ST98823A
ST980829A
ST96812A
Drive Specification
Formatted
Gbytes (512
bytes/sector)
120 100 80 60
Physical read/
write head
4433
Discs 2 2 2 2
Spindle Speed
(RPM)
4200 (ST9120824A, ST9100825A, ST980829A)
5400 (ST9120821A, ST9100824A, ST98823A, ST96812A)
Internal transfer
rate (Mbytes/sec.
max.)
56.25 (ST9120824A, ST9100825A, ST980829A)
48.25 (ST9120821A, ST9100824A, ST98823A, ST96812A)
I/O data transfer
rate (Mbytes/sec.
max.)
100
ATA data transfer
mode supported
PIO modes 0-4; Multiword DMA modes 0-2; Ultra DMA modes 0-5
Bytes per sector 512
Average latency
(msec)
5.6
Average seek,
read (msec.
typical)
12.5