ISL3179E_15 Datasheet, PDF (3/18 Pages) Intersil Corporation – High ESD Protected, +125°C, 40Mbps, 3.3V, Full Fail-Safe, RS-485/RS-422 Transceivers

Pin Configurations
ISL3179E
(8 LD SOIC, MSOP)
TOP VIEW
RO 1
R
RE 2
DE 3
DI 4
D
8 V_CC
7 B/Z
6 A/Y
5 GND
ISL3179E, ISL3180E
ISL3179E
(10 LD DFN)
TOP VIEW
RO ₁
RE 2
DE 3
DI 4
NC 5
10 ^VCC
9 NC
EP
8 B/Z
7 A/Y
6 GND
ISL3180E
(14 LD SOIC)
TOP VIEW
NC 1
RO 2
RE 3
R
DE 4
DI 5
D
GND 6
GND 7
14 V_CC
13 NC
12 A
11 B
10 Z
9Y
8 NC
Truth Table
TRANSMITTING
INPUTS
OUTPUTS
RE
DE
DI
B/Z
A/Y
X
1
1
0
1
X
1
0
1
0
0
0
X
High-Z
High-Z
1
0
X
High-Z*
High-Z*
NOTE: *Shutdown Mode
Truth Table
RECEIVING
INPUTS
RE
DE
A-B
0
0
≥ -0.05V
0
0
≤ -0.2V
0
0
Inputs Open/Shorted
1
1
X
1
0
X
NOTE: *Shutdown Mode
OUTPUT
RO
1
0
1
High-Z
High-Z*
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, and 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 ±16.5kV 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. ISL3179E only.
B/Z ±16.5kV 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. ISL3179E only.
A ±12kV HBM ESD protected RS-485/RS-422 level, noninverting receiver input. ISL3180E only.
B ±12kV HBM ESD protected RS-485/RS-422 level, inverting receiver input. ISL3180E only.
Y ±12kV HBM ESD protected RS-485/RS-422 level, noninverting driver output. ISL3180E only.
Z ±12kV HBM ESD protected RS-485/RS-422 level, inverting driver output. ISL3180E only.
V_CC System power supply input (3.0V to 3.6V).
NC No internal connection.
EP The exposed metal pad on the bottom of the DFN; connect to GND.
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FN6365.5
August 25, 2015