st485erb STMicroelectronics, st485erb Datasheet - Page 4

• Manufacturer Part Number: st485erb
• Description: Ic Txrx Lopwr Rs485/422 8 Dip
• Manufacturer: STMicroelectronics

2
Note:
Note:
4/19
Truth tables
Table 3.
X = Don’t care; Z = High impedance
Table 4.
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
A-B
-0.2V
DI
H
X
L
X
B
H
L
Z
Outputs
Outputs
RO
H
H
Z
L
A
H
Z
L