Conducted noise immunity, Power sequencing | Seagate ST3450802SS

7.2.1Conducted 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

7.2.2Power sequencing

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

7.2.3Current 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

Image 26

Seagate ST3450802SS, ST3600002SS manual Conducted noise immunity, Power sequencing, Current profiles

Contents

Cheetah NS 10K.2 SAS ST3600002SS ST3450802SSPage Contents Interface requirements Defect and error managementInstallation Seagate Technology support services Seagate Online Support and Services Scope Electromagnetic compatibility Standards, compliance and reference documentsStandards Electromagnetic susceptibility Compliance Reference documents General description Performance Standard featuresMedia description Reliability Programmable drive capacity Factory-installed optionsFormatted capacities Access time Performance characteristicsInternal drive characteristics Seek performance Start/stop time Format command execution time minutesGeneral performance characteristics Caching write data Prefetch/multi-segmented cache controlCache operation Prefetch operation Recoverable Errors Reliability specificationsError rates Unrecoverable Errors Preventive maintenance Reliability and serviceInterface errors Hot plugging the drive Performance impact 4 S.M.A.R.TControlling S.M.A.R.T Reporting control Thermal monitor Temperature Log Page 0Dh Parameter Code DescriptionPredictive failures Drive Self Test DST DST failure definition Implementation Extended test Function Code 010b Product warrantyShort test Function Code 001b Shipping DC power requirements Physical/electrical specificationsAC power requirements ST3600002SS DC power requirements ST3450802SS DC power requirements General DC power requirement notes Current profiles Power sequencingConducted noise immunity Typical ST3600002SS drive +5V and +12V current profiles ST3450802SS Power dissipationST3600002SS Temperature a. Operating Environmental limits Shock and vibration Relative humidityEffective altitude sea level a. Operating Shock Recommended mounting Acoustics Air cleanlinessVibration a. Operating-normal Corrosive environment China Restriction of Hazardous Substances RoHS Directive Mechanical specifications Physical dimensions Drive error recovery procedures Defect and error managementDrive internal defects/errors 77.81 Media Pre-Scan SAS system errorsBackground Media Scan Deferred Auto-Reallocation Idle Read After Write Installation Drive orientation Cooling Air flow Drive mounting Grounding SAS features Interface requirements Dual port support Scsi commands supported Commands supported by Cheetah NS 10K.2 SAS family drives Commands supported by Cheetah NS 10K.2 SAS family drives Commands supported by Cheetah NS 10K.2 SAS family drives Commands supported by Cheetah NS 10K.2 SAS family drives Inquiry data 10.3.2Mode Sense dataPage 10.3.2.1 ST3600002SS Mode Sense data Mode Pages 10.3.2.2 ST3450802SS Mode Sense data Miscellaneous status Miscellaneous operating features and conditionsMiscellaneous features SAS physical interface Datum B Physical characteristics Connector requirements SAS pin descriptions Electrical descriptionPin descriptions SAS transmitters and receivers Signal characteristicsPower Ready LED Out General interface characteristics LED drive signalDifferential signals 10.5.2.1 Eye masks 10.5.2.1.1 Eye masks overview Receive eye mask 2OP 0, 5 xadditional sinusoidal jitter X 1OP Transmitter signal characteristics Receiver signal characteristics Maximum allowable jitter Compliant jitter test pattern Cjtpat Impedance requirements Sheet 1 Impedance requirements Sheet 2 Electrical TxRx connections = -5, 437dB Shows the zero-length test load Additional information SAS-2 Specification complianceReceiver characteristics Cheetah NS 10K.2 SAS Product Manual, Rev. F Index Page SAS See also cooling Page Seagate Technology LLC Americas