ISL3159E_15 Datasheet, PDF (3/16 Pages) Intersil Corporation – ±15kV ESD Protected, +125°C, 40Mbps, 5V,PROFIBUS™, Full Fail-safe, RS-485/RS-422 Transceiver

ISL3159E
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, or
connected to a terminated bus that is undriven.
RE
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. If the Rx enable function isn’t required,
connect RE directly to GND.
DE
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. If the Tx
enable function isn’t required, connect DE to V_CC through a 1kΩ or greater resistor.
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. This is also the potential of the DFN’s exposed metal pad.
A/Y ±15kV IEC61000 ESD protected 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.
B/Z ±15kV IEC61000 ESD protected 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.
V_CC
System power supply input (4.5V to 5.5V).
NC
No internal connection.
EP
The exposed metal pad on the bottom of the DFN; connect to GND.
Typical Operating Circuit
1 RO
2 _RE
3 DE
+5V
8
V_CC
R
B/Z
A/Y
SOIC AND MSOP PIN NUMBERS SHOWN
+ _0.1µF
+
0.1µF
7
R_T
6
R_T
7
6
+5V
8
V_CC
B/Z
A/Y
D ^{DI 4}
DE ³
RE ²
4 DI
D
GND
5
R
GND
5
RO 1
FIGURE 2. TYPICAL OPERATING CIRCUIT
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FN6364.2
August 25, 2015