Extended Industry-Standard Architecture Interface; Scsi Interface; Electrical Interface; Single-Ended Output Signals - Adaptec AHA-2740W User Manual

AHA-2740W/2742W/2744W User's Guide
Extended Industry-Standard Architecture
Interface
Driver Output Signals:
V 0 volts minimum
OL
I 24 mA
OL
V 2.4 volts minimum
OH
I 8 mA
OH
Receiver Input Signals:
V 0.8 volts maximum
IL
V 2.0 volts minimum
IH

SCSI Interface

Electrical Interface

These are the specifications listed in ANSI X3.131-1986 for single-
ended and differential operation.

Single-ended Output Signals

All signals use open-collector or three-state drivers. Each signal
driven by a SCSI device has the following output characteristics
when measured at the SCSI device's connector:
Signal Definition
V Low-level output
OL
voltage
V High-level output
OH
voltage
A-4
A AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
A A
AHA-2740W/2742W/2744W User's Guide
A A
A A Stock Number: 510647-00, Rev. A
A
A A Print Spec Number: 492897-00
A A
Current Date: 8/3/94
A A AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA AAAA
AAAA
0.4 volts maximum
5.25 volts maximum
Characteristics
0.0 to 0.5 volts DC at 48 mA sinking (signal
assertion)
2.5 to 5.25 volts DC (signal negation)
ECN Date: 8/9/94
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A
A A
A A
Page: A-4 A A
A
A A
A A
AAAA AAAA AAAA A A A A