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Configuring the Agilent E1330B Digital I/O
Chapter 2
Using with External Pull-ups
The Digital I/O module data lines can be used in an open collector
configuration. Connections for open collector require the use of external
power supplies and pull-up resistors. The internal pull-up mode of the
Digital I/O module should be disabled for open collector output. Figure 2-10
shows a single data line connection. The value of the pull-up resistor is
calculated as follows:
The value of TTL high with the 200
Ω
pull-up resistor is calculated as
follows:
Figure 2-10. Typical Open Collector Data Line
Vcc
5.0 Vdc
=
Imax
Iout
Low
safety_factor
×
48mA
0.52
×
25mA
=
=
=
R
Vcc
Imax
------------
5
0.025
-------------
200
Ω
=
=
=
V
High
Vcc
6200
6200
200
+
---------------------------
×
4.84Vdc
=
=
Содержание E1330B
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Страница 10: ...8 Notes ...
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Страница 25: ...Configuring the Agilent E1330B Digital I O Module 23 Chapter 2 Figure 2 6 J1 and J2 Connector Pinouts ...
Страница 32: ...30 Configuring the Agilent E1330B Digital I O Chapter 2 Notes ...
Страница 42: ...40 Using the Agilent E1330B Digital I O Module Chapter 3 Notes ...
Страница 58: ...56 Understanding the Agilent E1330B Digital I O Module Chapter 4 Notes ...
Страница 104: ...102 Agilent E1330B Digital I O Module Command Reference Chapter 5 Notes ...
Страница 146: ...144 Error Messages Appendix C Notes ...