ST485 ST Microelectronics, ST485 Datasheet - Page 4

• Manufacturer Part Number: ST485
• Description: Low power RS-485/RS-422 transceiver
• Manufacturer: ST Microelectronics

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