ISL43485 Intersil Corporation, ISL43485 Datasheet - Page 2

• Manufacturer Part Number: ISL43485
• Description: 3.3V/ Low Power/ 30Mbps/ RS-485/RS-422
• Manufacturer: Intersil Corporation

Truth Tables
NOTE: *Shutdown Mode
Pin Descriptions
Typical Operating Circuit
GND
V
PIN
A/Y
B/Z
RO
RE
DE
RE
DI
X
X
CC
0
1
Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating).
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.
Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low.
Ground connection.
Noninverting receiver input and noninverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1.
Inverting receiver input and inverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1.
System power supply input (3V to 3.6V).
INPUTS
DE
1
1
0
0
1
2
3
4
RO
RE
DE
DI
TRANSMITTING
D
R
8
+3.3V
GND
V
DI
X
X
1
0
2
CC
5
B/Z
A/Y
7
6
High-Z *
High-Z
+
Z
0
1
0.1µF
OUTPUTS
R
T
High-Z *
High-Z
Y
1
0
ISL43485
ISL43485
FUNCTION
NOTE: *Shutdown Mode
RE
0
0
0
1
1
R
0.1µF
T
INPUTS
+
DE
0
0
0
0
1
7
6
RECEIVING
B/Z
A/Y
+3.3V
V
GND
Inputs Open
CC
≥ +0.2V
≤ -0.2V
5
8
A-B
X
X
R
D
RO
DE
RE
DI
4
3
2
1
OUTPUT
High-Z *
High-Z
RO
1
0
1