Power Reset Limits - Maxtor D740X-6L 20.0 AT Product Manual

9. Average random seek is defined as the average seek time between random logical
block addresses (LBAs).
   2 1 9 ' 4
The Maxtor D740X-6L 20.0/40.0/60.0/80.0GB AT hard disk drives operate from
two supply voltages:
• +12V ±10%
• +5V ±5%
The allowable ripple and noise is 250 mV peak-to-peak for the +12 Volt supply and
150 mV peak-to-peak for the +5Volt supply.
     2 Q Y G T 5 G S W G P E K P I
You may apply the power in any order, or open either the power or power return
line with no loss of data or damage to the disk drive. However, data may be lost in
the sector being written at the time of power loss. The drive can withstand transient
voltages of +10% to –100% from nominal while powering up or down.
     2 Q Y G T 4 G U G V . K O K V U
When powering up, the drive remains reset (inactive) until both rising voltage
thresholds reset limits are exceeded for
becomes reset when either supply voltage drops below the falling voltage threshold
≥ µ
for
& % 8 1 . 6 # ) '
+5 V
+12 V
1 ms.
6 C D N G  
6 * 4 ' 5 * 1 . &
V =
T h r e s h o l d
4.3V minimum
4.6V maximum
V =
T h r e s h o l d
8.7V minimum
9.7V maximum
≥
30 ms. When powering down, the drive

Power Reset Limits

60 mV (typical)
180 mV (typical)
Maxtor D740X-6L 20.0/40.0/60.0/80.0GB AT
Specifications
* ; 5 6 ' 4 ' 5 + 5
4-5