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dSPACE DS1104 - I;O Circuit and Electrical Characteristics

dSPACE DS1104
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Signal Connection to External Devices
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DS1104 Hardware Installation and Configuration March 2004
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I/O Circuit and Electrical Characteristics
I/O circuit The following illustration is a simplified diagram of the input/output
circuitry of the bit I/O.
Electrical characteristics The bit I/O has TTL output/input levels with the following
characteristics.
Output
Enable
I/Ox
33
10 k
VCC
I
Parameter Value
Min. Max.
Input voltage High
Low
2.0 V
0V
5.0 V
0.8 V
Output voltage High
Low
2.4 V
0V
5.0 V
0.4 V
Output current –5 mA +5 mA
Input current
(The current direction is shown in the circuit
diagram above.)
500 µA
Power-up default All bit I/O output circuits are
disabled and driven to VCC
by the built-in 10 k pull-up
resistors.

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