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ISL4485E Datasheet(PDF) 2 Page - Intersil Corporation

Part No. ISL4485E
Description  ±15kV ESD Protected, 20Mbps, 5V, Low Power, RS-485/RS-422 Transceiver
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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ISL4485E Datasheet(HTML) 2 Page - Intersil Corporation

 
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2
Truth Tables
TRANSMITTING
INPUTS
OUTPUTS
RE
DE
DI
B/Z
A/Y
X
1101
X
1010
X
0
X
High-Z
High-Z
RECEIVING
INPUTS
OUTPUT
RE
DE
A-B
RO
00
≥ +0.2V
1
00
≤ -0.2V
0
0
0
Inputs Open
1
1
X
X
High-Z
Pin Descriptions
PIN
FUNCTION
RO
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).
RE
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
DE
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.
DI
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.
GND
Ground connection.
A/Y
±15kV HBM ESD Protected, noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0; pin is an output
(Y) if DE = 1.
B/Z
±15kV HBM ESD Protected, inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is an output (Z) if
DE = 1.
VCC
System power supply input (4.5V to 5.5V).
Typical Operating Circuit
0.1
µF
+
D
R
7
6
8
1
2
3
4
5
VCC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
0.1
µF
+
D
R
6
7
8
1
2
3
4
5
VCC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
RT
RT
ISL4485E
ISL4485E


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