Samsung SFD-321B specifications Signal Level, Recommended Interface Circuit

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FLOPPY DISK DRIVE SPECIFICATION

PAGE	16

MODEL	SFD-321B

5.SIGNAL CHARACTERISTICS

5.1Signal Level

Signal Logic	Input Level		Output Level (*1)

Low (True)	0.9	V Max.	0.4	V Max.

High (False)	2.2	V Min.	2.4	V Min.

<Note>

(*1) "LOW" level Max. sink current is 48 mA.

5.2 Recommended Interface Circuit

HOST SIDE

7438 SERIES CMOS OR EQUIVALENT


							FDD SIDE

	Vdd
(1 ㏀ )					CMOS


					(SCHMITT TRIGGER INPUT)
					(SCHMITT TRIGGER INPUT)

	INPUT
Vdd
150 Ω∼2.2	㏀
(1 ㏀ is recommended)
	OUTPUT
74LS14	OPEN DRAIN
74HC14 OR
EQUIVALENT
	FRAME GND

SEMA ELECTRONICS CO.,LTD

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Contents OEM Manual SFD-321B Floppy Disk Drive SpecificationSafety Standards Packaging Description Disk Used ApplicationLOW High E M Density Standard Option PerformanceFloppy Disk Drive Specification Environmental Conditions SpecificationReliability E M SpecificationPower Supply Physical Specifications Page Page Page SFD-321B*1 Signal InterfacePower Interface Signal Interface Connector and Cable Side Connector Interface ConnectorsSignal Interface Connector Side Power Interface Connector and Cable Side Connector Power Interface ConnectorConnector Recommended Interface Circuit Signal LevelSignal Logic Input Level Output Level *1 Type Contents Input SignalsDensity Select Drive Select 0Motor On Density Mode Transfer Rate TypDirection Select StepWrite Gate Output SignalsSide Select IndexRead Data MFM TrackWrite Protect Disk Change / Ready Timing Diagram Safety Standards Serial Number Label Marking Label DescriptionS1ARB00001 Label DescriptionPage Page Trace Name Description Trace OptionsMode Other Options Buyer SelectionSelection of Bezel Type Color of Bezel, ButtonGeneral Comment