Seagate ST1.3 ST1.3 Series Product Manual - Page 15

Conducted noise, Note., Voltage tolerance

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2.7.2 Conducted noise Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on the +3.3 volt line. Using 3.3-volt power, the drive is expected to operate with a maximum of 70 mV peak-to-peak square-wave injected noise at up to 20 MHz. Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current. 2.7.3 Voltage tolerance Voltage tolerance (including noise): 3.3V ± 5% ST1.3 Series Product Manual, Rev. D 9

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ST1.3 Series Product Manual, Rev. D
9
2.7.2
Conducted noise
Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on
the +3.3 volt line.
Using 3.3-volt power, the drive is expected to operate with a maximum of 70 mV
peak-to-peak square-wave
injected noise at up to 20 MHz.
Note.
Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write
current.
2.7.3
Voltage tolerance
Voltage tolerance (including noise):
3.3V ± 5%