ISL3150E, ISL3152E, ISL3153E, ISL3155E, ISL3156E, ISL3158E
Truth Tables
RECEIVING
TRANSMITTING
INPUTS
DE
OUTPUT
INPUTS
OUTPUTS
RE
DE
Half Duplex Full Duplex
A-B
RO
RE
X
DE
1
DI
1
Z
0
1
Y
1
0
0
0
0
0
0
X
X
X
≥ -0.05V
≤ -0.2V
1
0
1
X
1
0
0
Inputs
Open/Shorted
0
0
X
X
High-Z
High-Z
High-Z *
1
0
High-Z *
1
1
0
1
0
1
X
X
High-Z *
High-Z
NOTE: *Shutdown Mode (See Note 9).
NOTE: *Shutdown Mode (See Note 9).
Pin Descriptions
PIN
FUNCTION
RO
RE
Receiver output: If A-B ≥ -50mV, RO is high; If A-B ≤ -200mV, RO is low; RO = High if A and B are unconnected (floating) or shorted.
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.
DE
DI
GND
A/Y
±16.5kV IEC61000 ESD Protected RS-485/422 level, noninverting receiver input and noninverting driver output. Pin is an input if
DE = 0; pin is an output if DE = 1.
B/Z
±16.5kV IEC61000 ESD Protected RS-485/422 level, Inverting receiver input and inverting driver output. Pin is an input if DE = 0; pin
is an output if DE = 1.
A
B
Y
Z
±16.5kV IEC61000 ESD Protected RS-485/422 level, noninverting receiver input.
±16.5kV IEC61000 ESD Protected RS-485/422 level, inverting receiver input.
±16.5kV IEC61000 ESD Protected RS-485/422 level, noninverting driver output.
±16.5kV IEC61000 ESD Protected RS-485/422 level, inverting driver output.
System power supply input (4.5V to 5.5V).
V
CC
NC
No Connection.
FN6363.0
December 14, 2006
3
INTERSIL [ Intersil ]
