Floppy Disk Interface
Standard Electronic and Physical Interface
Table A-6. Output and Input Signals
Driver Output Signals
V
OL
0 volts minimum
0.5 volts maximum
V
OH
Open collector
5.25 volts maximum
I
OL
60 mA
I
OH
0.1 mA
Receiver Input Signals
V
T-
1.0 volts maximum
V
T+
1.4 volts minimum
Tied to +5 volt supply through 150 ohm resistors. Schmitt Trigger with
0.8-volt hysteresis.
Connector
The floppy disk interface connector should be an unshrouded
34-pin header.
❒
Adaptec AHA-2740 Series User’s Manual
Stock Number: 510381-00 / Rev. C (Page A-8)
Print Spec Number: 491709-00 Rev C
Current Date: 9/1/93 ECN Date: 9/14/93
AHA-2740 Series User’s Manual
A-8
