ST485ER STMicroelectronics, ST485ER Datasheet - Page 4

• Manufacturer Part Number: ST485ER
• Description: Low power RS-485/RS-422 transceiver
• Manufacturer: STMicroelectronics

Truth tables
2
Note:
Note:
4/19
Truth tables
Table 2.
X = Don’t care; Z = High impedance
Table 3.
X = Don’t care; Z = High impedance
RE
RE
X
X
X
H
L
L
L
Truth table (driver)
Truth table (receiver)
Inputs
Inputs
DE
DE
H
H
L
L
L
L
L
Inputs open
≥
≤
-0.2V
+0.2V
A-B
DI
H
X
L
X
B
H
Z
L
Outputs
Outputs
RO
H
H
Z
L
ST485ER
A
H
L
Z