Adaptec AHA-2742T User Manual - Page 89
Floppy Disk Interface
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AHA-2740 Series User's Manual Floppy Disk Interface Standard Electronic and Physical Interface Table A-6. Output and Input Signals Driver Output Signals VOL 0 volts minimum 0.5 volts maximum VOH Open collector 5.25 volts maximum IOL 60 mA IOH 0.1 mA Receiver Input Signals VT- 1.0 volts maximum VT+ 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. Ì A-8 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
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