Seagate ST936751SS, ST973451SS manual Impedance specifications, Impedance requirements Sheet 1

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9.5.2.3.4Impedance specifications

Table 21 defines impedance requirements.

Table 21: Impedance requirements (Sheet 1 of 2)

Requirement	Units	1.5 Gbps	3.0 Gbps

Time domain reflectometer rise time 20 % to 80 %a,b	ps	100	50
Media (PCB or cable)

Differential impedanceb,c,d	ohm	100 ± 10	100 ± 10
Differential impedance imbalanceb,c,d,g	ohm	5	5
Common mode impedanceb,c,d	ohm	32.5 ± 7.5	32.5 ± 7.5
Mated connectors

Differential impedanceb,c,d	ohm	100 ± 15	100 ± 15
Differential impedance imbalanceb,c,d,g	ohm	5	5
Common mode impedanceb,c,d	ohm	32.5 ± 7.5	32.5 ± 7.5
Receiver termination

Differential impedanceb,e,f	ohm	100 ± 15	100 ± 15
Differential impedance imbalanceb,e,f,g	ohm	5	5
Receiver termination time constantb,e,f	ps	150 max	100 max
Common mode impedanceb,e	ohm	20 min/40 max	20 min/40 max
Transmitter source termination

Differential impedanceb	ohm	60 min/115 max	60 min/115 max
Differential impedance imbalanceb,g	ohm	5	5
Common mode impedanceb	ohm	15 min/40 max	15 min/40 max

Savvio 15K SAS Product Manual, Rev. B

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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 requirementsList of Figures Page Scope Savvio 15K SAS Product Manual, Rev. B Standards Applicable standards and reference documentationElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance for the European Union Electromagnetic complianceAustralian C-Tick Korean MICEuropean Union Restriction of Hazardous Substances RoHS Reference documentsSavvio 15K SAS Product Manual, Rev. B General description Media description Standard featuresPerformance Reliability Factory-installed accessoriesFormatted capacities Programmable drive capacityOptions Internal drive characteristics Performance characteristicsSeek performance characteristics Access time Gen 2.0 LP dataGeneral performance characteristics Format command execution timePrefetch/multi-segmented cache control Start/stop timeCache operation Prefetch operation Caching write dataError rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsSeek errors Reliability and serviceInterface errors Preventive maintenanceControlling S.M.A.R.T 4 S.M.A.R.TPerformance impact Reporting controlPredictive failures Temperature Log Page 0DhThermal monitor Parameter Code DescriptionDST failure definition State of the drive prior to testingImplementation Invoking DSTShort test Function Code 001b Product warrantyExtended test Function Code 010b Log page entriesProduct repair and return information ShippingSavvio 15K SAS Product Manual, Rev. B AC power requirements Physical/electrical specificationsDC power requirements ST973451SS DC power requirementsGeneral DC power requirement notes ST936751SS DC power requirementsConducted noise immunity Power sequencingCurrent profiles Typical ST936751SS current profile ST973451SS in 3 Gbit operation Power dissipationST973451SS in 1.5 Gbit operation ST936751SS in 1.5 Gbit operation ST936751SS in 3 Gbit operationEnvironmental limits TemperatureRelative humidity Shock and vibration Effective altitude sea levelShock Recommended mounting Vibration Air cleanlinessCorrosive environment Acoustics Mounting configuration dimensions Mechanical specificationsDrive internal defects/errors Defect and error managementDrive error recovery procedures SAS system errors Media Pre-Scan Background Media ScanDeferred Auto-Reallocation Idle Read After Write Drive orientation InstallationAir flow CoolingGrounding Drive mountingSavvio 15K SAS Product Manual, Rev. B Interface requirements SAS featuresDual port support Commands supported by Savvio SAS family drive Scsi commands supportedCommands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Commands supported by Savvio SAS family drive Inquiry data Mode Sense dataSavvio inquiry data Page Mode Data Header 04 45 dc cc 00 00 02 Miscellaneous features Miscellaneous operating features and conditionsMiscellaneous status SAS physical interface Datum B Section C C Section a a Connector requirements Physical characteristicsElectrical description Pin descriptionsSAS transmitters and receivers SAS pin descriptionsSignal characteristics Eye masks Eye masks overview General interface characteristicsReceive eye mask Z1 OP Jitter tolerance masksPeak-to Transmitter signal characteristicsSinusoidal JitterReceiver signal characteristics Receiver jitter tolerance Maximum allowable jitterCompliant jitter test pattern Cjtpat Impedance requirements Sheet 1 Impedance specificationsImpedance requirements Sheet 2 Transmitter characteristicsElectrical 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 SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Numerics IndexPage SAS See also cooling