Electrical Specifications (Fd Interface Signal); F/D Interface Driver/Receiver - Hitachi 902 Service Manual

15.3.3 Electrical Specifications (F/D interface signal)

F/D Interface Driver/receiver

Drive 0
Host system Final drive
+5 V
+5 V
1 kΩ
1 kΩ
7438 or equivalent
+5 V
+5 V
+5 V
5.6 kΩ
5.6 kΩ
(150 to) 1 kΩ
74LS14 or
equivalent
Open drain
Cable length 1.5 m (max.)
15 - 9