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UM3352E Datasheet(PDF) 7 Page - Union Semiconductor, Inc.

Part No. UM3352E
Description  ESD-Protected, Slew-Rate-Limited, Fail-Safe, True RS-485 Transceivers
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Manufacturer  UNIONSEMI [Union Semiconductor, Inc.]
Direct Link  http://www.union-ic.com
Logo UNIONSEMI - Union Semiconductor, Inc.

UM3352E Datasheet(HTML) 7 Page - Union Semiconductor, Inc.

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__________________________________________________________________________
http://www.union-ic.com Rev.07 Sep.2015
7/13
UM3352E
Table2. Receiving
INPUTS
OUTPUTS
RE
______
DE
A-B
RO
0
X
≥-50mV
1
0
X
≤-200mV
0
0
X
Open/Shorted
1
1
1
X
High-Z
1
0
X
Shutdown
X=Don’t care; High-Z=High impedance
Typical Operating Circuit
Figure 1. Typical Half-Duplex RS-485 Network
Test Circuit
Figure 2. Driver DC Test Load
Figure 3. Driver Timing Test Circuit
Figure 4. Driver Enable/Disable Timing Test Load
Figure 5. Receiver Enable/Disable Timing Test Load
Figure 6. Receiver Propagation Delay Test Circuit
B
A
RLOAD/2
RLOAD/2
VOD
VOC
1K
1K
VCC
S1
S2
+
CRL
15pF
Test Point
Receive
Output
B
A
DI
DE
3V
VOD2
CL2
CL1
RDIFF
+
CL
S1
S2
VCC
Driver Output
Under Test
500ohm
R
D
DI
DE
RO
RE
R
D
DI
DE
RO RE
R
D
DE
RO RE
DI
B
A
B
A
B
A
R
D
DE
DI
RO
RE
B
A
120ohm
120ohm
B
A
Master Node
Slave Node1
Slave Node N
Terminal Slave Node
ATE
VD
R
B
A
Receiver
Output


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