DATASHEET
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E,
ISL32374E, ISL32179E
FN6824
Rev 2.00
August 13, 2015
The Intersil ISL32x7xE are ±16.5kV IEC61000-4-2 ESD
Protected, 3.0V to 5.5V powered, QUAD transmitters for
Features
• IEC61000 ESD protection on RS-422 outputs . . ±16.5kV
- Class 3 ESD level on all other pins . . . . . . . 12kV HBM
- High machine model ESD level on all pins. . . . . . 700V
balanced communication using the RS-422 standard. These
drivers have very low output leakage currents (±10µA), so
they present a low load to the RS-422 bus.
• Wide supply range . . . . . . . . . . . . . . . . . . . . 3.0V to 5.5V
• Specified for +125°C operation
Driver (Tx) outputs are tri-statable, and incorporate a hot
plug feature to keep them disabled during power-up and
down. Versions are available with a common EN/EN
(‘172 pinout), a two channel EN12/EN34 (‘174 pinout), or a
versatile combination of individual and group channel
enables (see Table 1).
• Available in industry standard pinouts (‘172/’174) or in a
space saving QFN (ISL32179E) with added features
• Logic supply pin (V ) eases operation in mixed supply
L
systems (ISL32179E only)
• User selectable data rate (ISL32179E only)
The ISL32372E, ISL32374E utilize slew rate limited drivers
which reduce EMI and minimize reflections from improperly
terminated transmission lines, or from unterminated stubs in
multidrop and multipoint applications. Drivers on the other
versions are not limited, so they can achieve the 10Mbps or
32Mbps data rates. All versions are offered in industrial and
extended industrial (-40°C to +125°C) temperature ranges.
• Hot plug - Tx outputs remain three-state during power-up
and power-down
• Low Tx leakage allows > 256 devices on the bus
• High data rates. . . . . . . . . . . . . . . . . . . . . . up to 32Mbps
• Low quiescent supply current. . . . . . . . . . . . 0.8mA (max)
- Low shutdown supply current. . . . . . . . . . . . . . . . 60µA
A 50% smaller footprint (compared to the TSSOP) is
available with the ISL32179E’s QFN package. This device
• Current limiting and thermal shutdown for driver overload
protection
also features a logic supply pin (V ), that sets the switching
L
• Tri-statable Tx outputs
points of the enable and DI inputs to be compatible with a
lower supply voltage in mixed voltage systems. Two speed
select pins allow the ISL32179E user to select from three
slew rate options for 460kbps, 10Mbps, or 32Mbps data
rates. Individual channel and group enable pins increase the
ISL32179E’s flexibility.
• 5V tolerant logic inputs when V
• Pb-free (RoHS compliant)
≤ 5V
CC
Applications
• Telecom equipment
• Motor controllers/encoders
• Programmable logic controllers
• Industrial/process control networks
TABLE 1. SUMMARY OF FEATURES
SLEW
RATE
FUNCTION RATE (Mbps) LIMITED? PLUG? PIN?
TX
ENABLE QUIESCENT
LOW
POWER
DATA
HOT
V
PIN
L
PART NUMBER
ISL32172E
TYPE
EN, EN
EN, EN
EN, EN
I
(mA) SHUTDOWN? COUNT
CC
<1
4 Tx
4 Tx
4 Tx
32
10
NO
NO
YES
YES
YES
NO
NO
NO
NO
NO
NO
16
16
16
ISL32272E
<1
<1
ISL32372E (No longer available
0.46
YES
or supported)
ISL32174E
4 Tx
4 Tx
32
10
NO
NO
YES
YES
NO EN12, EN34
NO EN12, EN34
<1
<1
NO
NO
16
16
ISL32274E (No longer available
or supported)
ISL32374E (No longer available
or supported)
4 Tx
4 Tx
0.46
YES
YES
NO EN12, EN34
<1
<1
NO
16
24
ISL32179E
32, 10, 0.46 SELECTABLE YES YES Indiv. and
YES
group
enables
FN6824 Rev 2.00
August 13, 2015
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