Conducted noise immunity, Power sequencing | Seagate ST936751SS

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	0Hz 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

Typical +12V and +5V current profiles are shown below .

Note: All times and currents are typical. See Tables 2 and 3 for maximum current requirements.

Figure 1. Typical ST973451SS current profile

Savvio 15K SAS Product Manual, Rev. B

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Seagate ST936751SS, ST973451SS manual Conducted noise immunity, Power sequencing, Current profiles

Contents

100407739 Rev. B Savvio 15K SASPage Revision status summary sheet Savvio 15K SAS Product Manual, Rev. B Contents Installation Defect and error managementSeagate Technology support services Interface requirements List of Figures Page Scope Savvio 15K SAS Product Manual, Rev. B Standards Applicable standards and reference documentationElectromagnetic compatibility Electromagnetic susceptibility Electromagnetic compliance for the European Union Electromagnetic complianceAustralian C-Tick Korean MIC European Union Restriction of Hazardous Substances RoHS Reference documents Savvio 15K SAS Product Manual, Rev. B General description Standard features Media descriptionPerformance Reliability Factory-installed accessoriesFormatted capacities Programmable drive capacity Options Internal drive characteristics Performance characteristicsSeek performance characteristics Access time Gen 2.0 LP data General performance characteristics Format command execution time Start/stop time Prefetch/multi-segmented cache controlCache operation Prefetch operation Caching write data Error rates Reliability specificationsRecoverable Errors Unrecoverable Errors Seek errors Reliability and serviceInterface errors Preventive maintenance Controlling S.M.A.R.T 4 S.M.A.R.TPerformance impact Reporting control Predictive failures Temperature Log Page 0DhThermal monitor Parameter Code Description DST failure definition State of the drive prior to testingImplementation Invoking DST Short test Function Code 001b Product warrantyExtended test Function Code 010b Log page entries Product repair and return information Shipping Savvio 15K SAS Product Manual, Rev. B AC power requirements Physical/electrical specificationsDC power requirements ST973451SS DC power requirements General DC power requirement notes ST936751SS DC power requirements Power sequencing Conducted noise immunityCurrent profiles Typical ST936751SS current profile Power dissipation ST973451SS in 3 Gbit operationST973451SS in 1.5 Gbit operation ST936751SS in 1.5 Gbit operation ST936751SS in 3 Gbit operation Temperature Environmental limitsRelative humidity Effective altitude sea level Shock and vibrationShock Recommended mounting Air cleanliness VibrationCorrosive environment Acoustics Mounting configuration dimensions Mechanical specifications Defect and error management Drive internal defects/errorsDrive error recovery procedures SAS system errors Background Media Scan Media Pre-ScanDeferred Auto-Reallocation Idle Read After Write Drive orientation Installation Air flow Cooling Grounding Drive mounting Savvio 15K SAS Product Manual, Rev. B Interface requirements SAS features Dual port support Commands supported by Savvio SAS family drive Scsi commands supported Commands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Mode Sense data Inquiry dataSavvio inquiry data Page Mode Data Header 04 45 dc cc 00 00 02 Miscellaneous operating features and conditions Miscellaneous featuresMiscellaneous status SAS physical interface Datum B Section C C Section a a Connector requirements Physical characteristicsElectrical description Pin descriptions SAS transmitters and receivers SAS pin descriptions Signal characteristics General interface characteristics Eye masks Eye masks overviewReceive eye mask Z1 OP Jitter tolerance masks Peak-to Transmitter signal characteristicsSinusoidal Jitter Receiver signal characteristics Maximum allowable jitter Receiver jitter toleranceCompliant jitter test pattern Cjtpat Impedance requirements Sheet 1 Impedance specifications Transmitter characteristics Impedance requirements Sheet 2Electrical TxRx connections = -5,437dB Shows the zero-length test load Receiver characteristics Savvio 15K SAS Product Manual, Rev. B Internet Seagate Technology support servicesPresales Support Technical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Numerics IndexPage SAS See also cooling