st485ab STMicroelectronics, st485ab Datasheet - Page 4

• Manufacturer Part Number: st485ab
• Description: Very High Speed Low Power Rs-485/rs-422 Transceiver
• Manufacturer: STMicroelectronics

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