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AN1690 Datasheet(PDF) 13 Page - STMicroelectronics

Part # AN1690
Description  Fail-safe biasing for ST485EB
PDF  15 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1690 Datasheet(HTML) 13 Page - STMicroelectronics

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AN1690
Fail-safe circuit comparisons with ST485EB
13/15
Figure 12.
Fail-safe DC termination - eye pattern and test circuit
Figure 13.
Fail-safe AC termination - eye pattern and test circuit
120
500
500
PRBS
GENERATOR
CH1
differential
probe
CH3
probe
100 Cable
130
Receiver
Input
Receiver
Output
120
500
500
PRBS
GENERATOR
CH1
differential
probe
CH3
probe
100 Cable
130
120
120
120
500
500
PRBS
GENERATOR
CH1
differential
probe
CH3
probe
100 Cable
130
Receiver
Input
Receiver
Output
Receiver
Input
Receiver
Output
C
Rc
Ra
Rb
C
Rb
PRBS
GENERATOR
CH1
differential
probe
CH3
probe
100m
cable
Receiver
Input
Receiver
Output
C
Rc
Ra
Rb
C
Rb
PRBS
GENERATOR
CH1
differential
probe
CH3
probe
100m
cable
C
Rc
Ra
Rb
Rb
C
Rb
C
Rb
Rb
PRBS
GENERATOR
CH1
differential
probe
CH3
probe
100m
cable
Receiver
Input
Receiver
Output
Receiver
Input
Receiver
Output



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