ISL81485IU Intersil, ISL81485IU Datasheet - Page 2

• Manufacturer Part Number: ISL81485IU
• Description: IC TXRX RS485/422 5V HS 8-MSOP
• Manufacturer: Intersil
• Type: Transceiverr

Specifications of ISL81485IU

• Number Of Drivers/receivers: 1/1
• Protocol: RS422, RS485
• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Truth Table
Pin Descriptions
Typical Operating Circuit
GND
V
PIN
A/Y
B/Z
RO
RE
DE
RE
DI
X
X
X
CC
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.
RS-485/422 level, noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0; pin is an output (Y) if DE = 1.
RS-485/422 level, inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is an output (Z) if DE = 1.
System power supply input (4.5V to 5.5V).
INPUTS
DE
1
1
0
1
2
3
4
RO
RE
DE
DI
TRANSMITTING
D
R
8
+5v
GND
DI
X
V
1
0
2
CC
5
B / Z
A / Y
7
6
High-Z
B / Z
+
0
1
0.1µF
OUTPUTS
R
T
High-Z
A / Y
1
0
ISL81485
ISL81485
FUNCTION
Truth Table
RE
0
0
0
1
R
0.1µF
INPUTS
T
DE
X
0
0
0
+
7
6
A / Y
B / Z
RECEIVING
Inputs Open
≥ +0.2V
≤ -0.2V
A-B
GND
V
X
+5v
CC
5
8
R
D
DE
RO
RE
DI
4
3
2
1
OUTPUT
High-Z
RO
1
0
1