Adaptec AHA-2740-T User Manual download pdf (Page 89)

Floppy Disk Interface

Standard Electronic and Physical Interface

Table A-6. Output and Input Signals

Driver Output Signals

0 volts minimum 0.5 volts maximum

Open collector 5.25 volts maximum

60 mA

0.1 mA

Receiver Input Signals

T-

1.0 volts maximum

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

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Adaptec AHA-2740-T User Manual Page 89