Seagate ST336605LW/LC/LCV Conducted noise immunity, Power sequencing, 3 12 V Current profile

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Cheetah 73LP Product Manual, Rev. E

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 con- nector.

+5

V

=

150 mV pp from 0 to 100 kHz and 100 mV pp from 100 kHz to 10 MHz

+12

V

=

150 mV pp from 0 to 100 kHz and 100 mV pp from 100 kHz to 10 MHz

6.2.2Power sequencing

The drive does not require power sequencing. The drive protects against inadvertent writing during power-up and down. Daisy-chain operation requires that power be maintained on the SCSI bus terminator to ensure proper termination of the peripheral I/O cables. To automatically delay motor start based on the target ID (SCSI ID) enable the Delay Motor Start option and disable the Enable Motor Start option on the J2 connector. See Section 8.1 for pin selection information. To delay the motor until the drive receives a Start Unit command, enable the Enable Remote Motor Start option on the J2 connector.

6.2.312 V - Current profile

Figures 3 through 6 identify the drive +12 V current profiles. The current during the various times is as shown:

T0 - Power is applied to the drive.

T1 - Controller self tests are performed.

T2 - Spindle begins to accelerate under current limiting after performing drive internal diagnostics. See Note 1 of Table 2.

T3 - The spindle is up to speed and the head-arm restraint is unlocked.

T4 - The adaptive servo calibration sequence is performed.

T5 - Calibration is complete and drive is ready for reading and writing.

Note. All times and currents are typical. See Table 2 for maximum current requirements.

+12 Volt Current during spindle start – Typical Amperes

 

3.0

 

 

Envelope of waveform

 

 

 

 

 

 

 

 

 

 

 

 

 

2.5

 

 

 

 

 

 

 

 

 

 

 

 

Average value of waveform

 

 

 

Amperes

2.0

 

 

 

 

 

 

 

 

1.5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.0

 

 

 

 

 

 

 

 

 

0.5

 

 

 

 

 

 

 

 

 

0.0

 

 

 

 

 

 

 

 

 

0.0

2

4

6

8

10

12

14

16

 

 

 

 

 

Seconds

 

 

 

 

Figure 3. Typical ST373405 drive +12 V current profile

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Contents ST373405LW/LWV/LC/LCV ST336605LW/LC/LCV Page ST373405LW/LWV/LC/LCV ST336605LW/LC/LCV Page Revision status summary sheet Revision Date Writer/Engineer Sheets AffectedPage Contents Defect and error management InstallationSeagate Technology support services Interface requirementsList of Figures Cheetah 73LP Product Manual, Rev. E ViiPage Scope Cheetah 73LP family drive ST373405LW shownCheetah 73LP Product Manual, Rev. E Applicable standards and reference documentation Taiwanese Bsmi Australian C-TickKorean MIC General description Cheetah 73LP family drive Cheetah 73LP Product Manual, Rev. E Standard features Media characteristicsPerformance ReliabilityFactory installed accessories Options factory installedAccessories user installed Unformatted and formatted capacitiesPerformance characteristics Prefetch/multi-segmented cache control Ultra2 Scsi Ultra3 ScsiStart/stop time Cheetah 73LP Product Manual, Rev. E Cache operation Caching write dataPrefetch operation Reliability specifications Reliability and service Preventive maintenanceService life Service philosophy7 S.M.A.R.T Controlling S.M.A.R.TPerformance impact MillisecondsReporting control Determining rateState of the drive prior to testing DST Failure DefinitionImplementation Invoking DSTShort and extended tests Short test Function Code 001bExtended test Function Code 010b Log page entriesProduct repair and return information Cheetah 73LP Product Manual, Rev. E Product warrantyShipping Cheetah 73LP Product Manual, Rev. E DC power requirements Physical/electrical specificationsAC power requirements 3 12 V Current profile Power sequencingConducted noise immunity Typical ST336605 drive +12 V current profile Typical ST336605 drive +5 V current profile Amperes 000 900 800 700 600 Temperature Cheetah 73LP Product Manual, Rev. E Environmental limitsRelative humidity Effective altitude sea levelShock and vibration ShockRecommended mounting Acoustics Air cleanlinessVibration LW and LWV mounting configuration dimensions LC and LCV mounting configuration dimensions Drive internal defects Defect and error managementDrive error recovery procedures Scsi systems errors Installation Configure drive optionsFormatting Drive ID/option select headerDo not install jumpers retain cover J5 jumper header on LW/LWV models only J2 option select header Cheetah 73LP Product Manual, Rev. E Function description Does not apply to LC/LCV modelDrive orientation CoolingCheetah 73LP Product Manual, Rev. E Drive mounting GroundingCheetah 73LP Product Manual, Rev. E Interface requirements Scsi interface messages supportedScsi interface commands supported Cheetah 73LP Product Manual, Rev. E Cheetah 73LP Product Manual, Rev. E Inquiry Vital Product data Mode Sense data DEF CHG Cheetah 73LP Product Manual, Rev. E Condition/feature supported by Physical interface DC cable and connector2 REQ/ACK offset Pin Power Scsi interface physical description Scsi interface cable requirementsMating connectors Mating connectors for LW and LWV model drivesMating connectors for LC and LCV model drives ST373405LC/LCV and ST336605LC/LCVCheetah 73LP Product Manual, Rev. E Right-angle to Pcba connectors Scsi ID650±.005 155 100 346 Front View GND +DBP1 62Cheetah 73LP Product Manual, Rev. E REQ +REQ Multimode-SE and LVD alternatives LVD output characteristicsElectrical description General cable characteristics Single-ended drivers/receiversCables for low voltage differential drivers/receivers Terminator requirementsLC and LCV drives Disc drive Scsi timing Spindle status Command status LED status Drive activity LEDCheetah 73LP Product Manual, Rev. E Seagate Technology support services Online Services Automated ServicesPresales Support Technical SupportEuropean Support Services Customer Service CSOUSA/Canada/Latin America Support Services Call Center Toll-free Direct dial Africa/Middle East Support ServicesAsia/Pacific Support Services Cheetah 73LP Product Manual, Rev. E Index Cheetah 73LP Product Manual, Rev. E Cheetah 73LP Product Manual, Rev. E Scam Scsi Scsi ID 80Cheetah 73LP Product Manual, Rev. E