ADM3491 Analog Devices, ADM3491 Datasheet - Page 10

• Manufacturer Part Number: ADM3491
• Description: 3.3 V/ Full Duplex/ 840 uA 20 Mbps/ EIA RS-485 Transceiver
• Manufacturer: Analog Devices

ADM3491
RE
X
X
0
1
RE
0
0
0
1
RO
DI
DE
RE
+3.3V
ADM3491
D
V
CC
Figure 23. ADM3491 Full-Duplex Data Link
R
GND
Inputs
Inputs
Table I. Transmitting Truth Table
Z
Y
A
B
DE
1
1
0
0
DE
X
X
X
X
Table II. Receiving Truth Table
0.1 F
RS-485/RS-422 LINK
Transmitting
DI
1
0
X
X
Receiving
A–B
> +0.2 V
< –0.2 V
Inputs O/C
X
–10–
Z
0
1
Hi-Z
Hi-Z
Outputs
+3.3V
Outputs
RO
1
0
1
Hi-Z
Y
Z
B
A
GND
ADM3491
V
CC
R
D
Y
1
0
Hi-Z
Hi-Z
RO
RE
0.1 F
DE
DI
REV. 0