ISL32483E Datasheet, PDF (3/17 Pages) Intersil Corporation – Fault Protected, Extended CMR, RS-485/RS-422 Transceivers

ISL32483E, ISL32485E
Pin Descriptions
PIN
NAME
RO
ISL32483E
PIN #
2
RE
3
DE
4
DI
5
GND
6, 7
A/Y
N/A
B/Z
N/A
A
12
B
11
Y
9
Z
10
VCC
13, 14
INV
N/A
RINV
1
DINV
8
ISL32485E
PIN #
1
N/A
3
4
5
6
7
N/A
N/A
N/A
N/A
8
2
N/A
N/A
FUNCTION
Receiver output. 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).
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. Internally
pulled low.
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_CC.
Driver input. 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.
Ground connection.
±60V Fault and ±16.5kV HBM ESD Protected RS-485/RS-422 level I/O pin. 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.
±60V Fault and ±16.5kV HBM ESD Protected RS-485/RS-422 level I/O pin. 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.
±60V Fault and ±15kV HBM ESD 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.
±60V Fault and ±15kV HBM ESD Protected RS-485/RS-422 level input. If RINV is low, then B is the inverting
receiver input. If RINV is high, then B is the non-inverting receiver input.
±60V Fault and ±15kV HBM ESD Protected RS-485/RS-422 level output. If DINV is low, then Y is the
non-inverting driver output. If DINV is high, then Y is the inverting driver output
±60V Fault and ±15kV HBM ESD Protected RS-485/RS-422 level. If DINV is low, then Z is the inverting driver
output. If DINV is high, then Z is the non-inverting driver output
System power supply input (4.5V to 5.5V).
Receiver and driver polarity selection input. When driven high, this pin swaps the polarity of the driver output
and receiver input pins. If unconnected (floating) or connected low, normal RS-485 polarity conventions
apply. Internally pulled low.
Receiver polarity selection input. When driven high, this pin swaps the polarity of the receiver input pins. If
unconnected (floating) or connected low, normal RS-485 polarity conventions apply. Internally pulled low.
Driver polarity selection input. When driven high, this pin swaps the polarity of the driver output pins. If
unconnected (floating) or connected low, normal RS-485 polarity conventions apply. Internally pulled low.
3
FN7785.0
January 18, 2011