ISL31480E_10 Datasheet, PDF (3/24 Pages) Intersil Corporation – Fault Protected, Extended CMR, RS-485/RS-422 Transceivers with Cable Invert

ISL31480E, ISL31483E, ISL31485E, ISL31486E
Pin Descriptions
ISL31486E ISL31486E ISL31486E
PIN ISL31480E ISL31483E ISL31485E (12 LD)
(10 LD)
(14 LD)
NAME PIN #
PIN #
PIN #
PIN #
PIN #
PIN #
FUNCTION
RO
2
2
1
1
1
1
Receiver output. On the ISL31480E,
or if INV or RINV is low, then: If
A - B ≥ -10mV, RO is high; if A - B ≤
-200mV, RO is low. If INV or RINV is
high, then: If B - A ≥ -10mV, RO is
high; if B - A ≤ -200mV, RO is low.
In all cases, RO = High if A and B
are unconnected (floating), or
shorted together, or connected to
an undriven, terminated bus (i.e.,
Rx is always failsafe open, shorted,
and idle, even if polarity is
inverted).
RE
4
3
N/A
2
2
2
Receiver output enable. RO is
enabled when RE is low; RO is high
impedance when RE is high.
Internally pulled low.
DE
3
4
3
4
4
4
Driver output enable. The driver
outputs, Y and Z, are enabled by
bringing DE high, and they are high
impedance when DE is low.
Internally pulled high (to V_L on
ISL31480E and ISL31486E; to V_CC
on other versions).
DI
5
5
4
5
5
6
Driver input. On the ISL31480E, or
if INV or DINV is low, a low on DI
forces output Y low and output Z
high, while a high on DI forces
output Y high and output Z low.
The output states relative to DI
invert if INV or DINV is high.
GND
6
6, 7
5
7, 8
6
8, 9
Ground connection.This is also the
potential of the TDFN EPAD.
A/Y
8
N/A
6
9
7
11
±60V Fault Protected
RS-485/RS-422 level I/O pin. On
the ISL31480E, or if INV is low, A/Y
is the non-inverting receiver input
and non-inverting driver output. If
INV is high, A/Y is the inverting
receiver input and the inverting
driver output. Pin is an input if
DE = 0; pin is an output if DE = 1.
B/Z
9
N/A
7
10
8
12
±60V Fault Protected
RS-485/RS-422 level I/O pin. On
the ISL31480E, or if INV is low, B/Z
is the inverting receiver input and
inverting driver output. If INV is
high, B/Z is the non-inverting
receiver input and the non-
inverting driver output. Pin is an
input if DE = 0; pin is an output if
DE = 1.
A
N/A
12
N/A
N/A
N/A
N/A
±60V Fault Protected
RS-485/RS-422 level input. If RINV
is low, then A is the non-inverting
receiver input. If RINV is high, then
A is the inverting receiver input.
3
FN7638.0
June 25, 2010