ISL3158AE Datasheet, PDF (3/16 Pages) Intersil Corporation – ±16.5kV ESD (IEC61000-4-2) Protected, Large Output Swing, 5V, Full Fail-Safe, 1/8 Unit Load, RS-485/RS-422 Transceiver

ISL3158AE
Truth Tables
TRANSMITTING
INPUTS
OUTPUTS
RE
DE
DI
Z
Y
X
1
1
0
1
X
1
0
1
0
0
0
X
1
0
X
NOTE: *Shutdown Mode (See Note 7).
High-Z
High-Z*
High-Z
High-Z*
RECEIVING
INPUTS
OUTPUT
RE
DE
DE
A-B
RO
Half Duplex Full Duplex
0
0
X
≥ -0.05V
1
0
0
X
≤ -0.2V
0
0
0
X
Inputs
1
Open/Shorted
1
0
0
X
High-Z*
1
1
1
X
High-Z
NOTE: *Shutdown Mode (See Note 7).
Pin Descriptions
PIN
FUNCTION
RO 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.
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 ±16.5kV IEC61000 ESD Protected RS-485/RS-422 level, non-inverting 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/RS-422 level, inverting receiver input and inverting driver output. Pin is an input if DE = 0;
pin is an output if DE = 1.
V_CC System power supply input (4.5V to 5.5V).
3
FN6886.0
April 3, 2009