ISL32483E Datasheet, PDF (4/17 Pages) Intersil Corporation – Fault Protected, Extended CMR, RS-485/RS-422 Transceivers

ISL32483E, ISL32485E
Truth Tables
TRANSMITTING
INPUTS
OUTPUTS
RE
DE
DI INV or DINV
Y
Z
X
1
1
0
1
0
X
1
0
0
0
1
X
1
1
1
0
1
X
1
0
1
1
0
0
0
X
X
High-Z High-Z
1
0
X
X
High-Z High-Z
(see Note) (see Note)
NOTE: Low Power Shutdown Mode (see Note 11 on page 7), except
for ISL32485E.
Typical Operating Circuits
RECEIVING
INPUTS
OUTPUT
RE DE (Half DE (Full
A-B
INV or
RO
Duplex) Duplex)
RINV
0
0
X
≥ -0.01V
0
1
0
0
X
≤ -0.2V
0
0
0
0
X
≤ 0.01V
1
1
0
0
X
≥ 0.2V
1
0
0
0
X
Inputs
X
1
Open or
Shorted
1
0
0
X
X
High-Z
(see Note)
1
1
1
X
X
High-Z
NOTE: Low Power Shutdown Mode (see Note 11 on page 7), except for
ISL32485E.
+5V
13, 14
+
0.1µF
1
RINV
V_{CC B 11}
R_T
2 RO _R
A 12
3 RE
4 DE
5 DI
D
Y9
Z 10
8 _DINV
GND
6, 7
+5V
+
0.1µF
13, 14
9 Y ^VCC
10 Z
DI 5
D
DE 4
RE 3
R_T
11 B
12 ^A
R ^{RO 2}
GND
RINV
DINV
1
8
6, 7
THE IC ON THE LEFT HAS THE CABLE CONNECTIONS
SWAPPED, SO THE INV PINS (1, 8) ARE STRAPPED
HIGH TO INVERT ITS RX AND TX POLARITY
ISL34183E FULL DUPLEX EXAMPLE
4
FN7785.0
January 18, 2011