Seagate Cheetah NS 10K Cheetah NS 10K.2 SAS Product Manual - Page 26
Conducted noise immunity, Power sequencing, Current profiles
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7.2.1 Conducted noise immunity Noise is specified as a periodic and random distribution of frequencies covering a defined frequency range. Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power connector. +5V = 250 mV pp from 100 Hz 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 7.2.2 Power sequencing The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down. 7.2.3 Current profiles The +12V and +5V current profiles are shown below in figure 1. Note: All times and currents are typical. See Table 12 for maximum current requirements. 22 Cheetah NS 10K.2 SAS Product Manual, Rev. F