ISL3259E_08 Datasheet, PDF (3/16 Pages) Intersil Corporation – ±15kV ESD Protected, 100Mbps, 5V, PROFIBUS®, Full Fail-safe, RS-485/RS-422 Transceivers

ISL3259E
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 thermal pad.
A/Y ±15kV IEC61000 ESD Protected RS-485, RS-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, RS-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 (4.75V to 5.25V).
NC No Connection.
Typical Operating Circuit
+5V
+
0.1µF
8
V_CC
1 RO _R
2 _RE
B/Z 7
R_T
3 DE
A/Y 6
4 DI
D
GND
5
ISL3259E
MSOP PIN NUMBERS SHOWN
+5V
+
0.1µF
R_T
7
6
8
V_CC
B/Z
A/Y
DI 4
D
DE ³
RE ²
R
GND
5
RO 1
3
FN6587.1
February 18, 2008