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ST485 Datasheet(PDF) 4 Page - STMicroelectronics

Part No. ST485
Description  Low power RS-485/RS-422 transceiver
Download  19 Pages
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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ST485 Datasheet(HTML) 4 Page - STMicroelectronics

 
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Truth tables
ST485
4/19
2
Truth tables
Note:
X = Don’t care; Z = High impedance
Note:
X = Don’t care; Z = High impedance
Table 2.
Truth table (driver)
Inputs
Outputs
RE
DE
DI
B
A
XH
H
L
H
XH
L
H
L
XLX
Z
Z
Table 3.
Truth table (receiver)
Inputs
Outputs
RE
DE
A-B
RO
LL
≥ +0.2V
H
LL
≤ -0.2V
L
L
L
INPUTS OPEN
H
HL
X
Z


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