Seagate ST3146756SS (FDE) manual Conducted noise immunity, Power sequencing, Current profiles

Models: ST3450056SS (FDE) ST3300056SS (FDE) ST3146756SS (FDE) ST3146854LC ST3146356SSIM

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6.2.1Conducted noise immunity

Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector.

+5V

=

250 mV pp from 0 to

100 kHz to 20 MHz.

+12V

=

800 mV pp from 100

Hz to 8 KHz.

 

 

450 mV pp from 8 KHz to 20 KHz.

 

 

250 mV pp from 20 KHz to 5 MHz.

6.2.2Power sequencing

The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down.

6.2.3Current profiles

The +12V and +5V current profiles are shown below in the following figures.

Note: All times and currents are typical. See Tables 12, 14, and 16 for maximum current requirements.

Cheetah 15K.6 SAS Product Manual, Rev. B

27

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Seagate ST3146756SS (FDE), ST3146854LC, ST3146356SSIM manual Conducted noise immunity, Power sequencing, Current profiles