ISL31490E_10 Datasheet, PDF (4/27 Pages) Intersil Corporation – ±60V Fault Protected, 5V, RS-485/RS-422 Transceivers with ±25V Common Mode Range

ISL31490E, ISL31491E, ISL31492E, ISL31493E, ISL31495E, ISL31496E,
Pin Descriptions
PIN
NAME
8 LD
PIN #
(EXCEPT
ISL31491E)
8 LD
PIN #
(ISL31491E
ONLY)
10 LD 14 LD
PIN # PIN #
FUNCTION
RO
1
2
1
2 Receiver output: If A-B ≥ -10mV, RO is high; If A-B ≤ -200mV, RO is low;
RO = High if A and B are unconnected (floating), shorted together, or
connected to an undriven, terminated bus.
RE
2
-
2
3 Receiver output enable. RO is enabled when RE is low; RO is high
impedance when RE is high. Internally pulled low.
DE
3
-
3
4 Driver output enable. The driver outputs, Y and Z, are enabled by bringing
DE high. They are high impedance when DE is low. Internally pulled high.
DI
4
3
4
5 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
5
4
5
6, 7 Ground connection. This is also the potential of the TDFN EPAD.
A/Y
6
-
-
- ±60V Fault Protected RS-485/RS-422 level, non-inverting receiver input
and non inverting driver output. Pin is an input if DE = 0; pin is an output
if DE = 1.
B/Z
7
-
-
- ±60V Fault 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.
A
-
8
9
12 ±60V Fault Protected RS-485/RS-422 level, non-inverting receiver input.
B
-
7
8
11 ±60V Fault Protected RS-485/RS-422 level, inverting receiver input.
Y
-
5
6
9 ±60V Fault Protected RS-485/RS-422 level, non-inverting driver output.
Z
-
6
7
10 ±60V Fault Protected RS-485/RS-422 level, inverting driver output.
V_CC
8
PD
-
1
10 13, 14 System power supply input (4.5V to 5.5V).
-
TDFN - TDFN exposed thermal pad (EPAD). Connect to GND.
ONLY
NC
-
-
-
1, 8 No Internal Connection.
4
FN7637.0
June 17, 2010