SEMA ELECTRONICS CO.,LTD
FLOPPY DISK DRIVE SPECIFICATION
PAGE 16
MODEL SFD-321B
5. SIGNAL CHARACTERISTICS

5.1 Signal Level

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

5.2 Recommended Interface Circuit

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.
FRAME GND
OUTPUT
OPEN DRAIN
CMOS
(SCHMITT TRIGGER INPUT)
INPUT
150 Ω∼2.2 ㏀
(1 ㏀is recomm ended)
Vdd
Vdd
7438 SERIES
CMOS OR
EQUIVALENT
74LS14
74HC14 OR
EQUIVALENT
FDD SIDE
(1 ㏀)
HOST SIDE