DATASHEET
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E,
ISL32374E, ISL32179E
The Intersil ISL32x7xE are ±16.5kV IEC61000-4-2 ESD
Protected, 3.0V to 5.5V powered, QUAD transmitters for
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.
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).
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.
A 50% smaller footprint (compared to the TSSOP) is
available with the ISL32179E’s QFN package. This device
also features a logic supply pin (V
L
), that sets the switching
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.
FN6824
Rev 2.00
August 13, 2015
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
• Wide supply range . . . . . . . . . . . . . . . . . . . . 3.0V to 5.5V
• Specified for +125°C operation
• Available in industry standard pinouts (‘172/’174) or in a
space saving QFN (ISL32179E) with added features
• Logic supply pin (V
L
) eases operation in mixed supply
systems (ISL32179E only)
• User selectable data rate (ISL32179E only)
• 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
• Current limiting and thermal shutdown for driver overload
protection
• Tri-statable Tx outputs
• 5V tolerant logic inputs when V
CC
≤ 5V
• Pb-free (RoHS compliant)
Applications
• Telecom equipment
• Motor controllers/encoders
• Programmable logic controllers
• Industrial/process control networks
TABLE 1. SUMMARY OF FEATURES
DATA
FUNCTION RATE (Mbps)
4 Tx
4 Tx
4 Tx
4 Tx
4 Tx
4 Tx
4 Tx
32
10
0.46
32
10
0.46
SLEW
RATE
LIMITED?
NO
NO
YES
NO
NO
YES
HOT
V
L
PLUG? PIN?
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
TX
ENABLE
TYPE
EN, EN
EN, EN
EN, EN
LOW
QUIESCENT
POWER
PIN
I
CC
(mA) SHUTDOWN? COUNT
<1
<1
<1
<1
<1
<1
<1
NO
NO
NO
NO
NO
NO
YES
16
16
16
16
16
16
24
PART NUMBER
ISL32172E
ISL32272E
ISL32372E
(No longer available
or supported)
ISL32174E
ISL32274E
(No longer available
or supported)
ISL32374E
(No longer available
or supported)
ISL32179E
NO EN12, EN34
NO EN12, EN34
NO EN12, EN34
YES
Indiv. and
group
enables
32, 10, 0.46 SELECTABLE
FN6824 Rev 2.00
August 13, 2015
Page 1 of 20
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E, ISL32374E, ISL32179E
Pinouts
ISL32172E, ISL32272E, ISL32372E
(16 LD N-SOIC, TSSOP)
TOP VIEWS
DI1 1
Y1 2
Z1 3
EN 4
Z2 5
Y2 6
DI2 7
GND 8
D
D
D
D
16 V
CC
15 DI4
14 Y4
13 Z4
12 EN
11 Z3
10 Y3
9 DI3
ISL32174E, ISL32274E, ISL32374E
(16 LD N-SOIC, TSSOP)
TOP VIEWS
DI1 1
Y1 2
Z1 3
EN12 4
Z2 5
Y2 6
DI2 7
GND 8
D
D
D
D
16 V
CC
15 DI4
14 Y4
13 Z4
12 EN34
11 Z3
10 Y3
9 DI3
ISL32179E
(24 LD QFN)
TOP VIEW
SHDNEN
V
CC
DI1
24
Z1
EN1
EN2
EN
Z2
Y2
1
2
3
4
5
6
7
DI2
23
22
21
20
19
18 Y4
17 Z4
16 EN4
15 EN3
14 EN
EP
8
SPA
9
GND
10
SPB
11
DI3
12
Y3
DI4
13 Z3
Y1
Ordering Information
PART NUMBER
(Notes
1, 2, 3)
ISL32172EFBZ
ISL32172EFVZ
ISL32172EIBZ
ISL32172EIVZ
ISL32174EFVZ
ISL32174EIBZ
ISL32179EFRZ
ISL32179EIRZ
ISL32272EFBZ
ISL32272EFVZ
ISL32274EFBZ
(No longer available or supported)
ISL32274EFVZ
(No longer available or supported)
ISL32274EIBZ
(No longer available or supported)
ISL32274EIVZ
(No longer available or supported)
PART
MARKING
ISL32172 EFBZ
32172 EFVZ
ISL32172 EIBZ
32172 EIVZ
32174 EFVZ
ISL32174 EIBZ
321 79EFRZ
321 79EIRZ
ISL32272 EFBZ
32272 EFVZ
ISL32274 EFBZ
32274 EFVZ
ISL32274 EIBZ
32274 EIVZ
TEMP. RANGE
(°C)
-40 to +125
-40 to +125
-40 to +85
-40 to +85
-40 to +125
-40 to +85
-40 to +125
-40 to +85
-40 to +125
-40 to +125
-40 to +125
-40 to +125
-40 to +85
-40 to +85
PACKAGE
(RoHS Compliant)
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
16 Ld TSSOP
16 Ld SOIC
24 Ld QFN
24 Ld QFN
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
PKG.
DWG. #
M16.15
MDP0044
M16.15
MDP0044
MDP0044
M16.15
L24.4x4C
L24.4x4C
M16.15
MDP0044
M16.15
MDP0044
M16.15
MDP0044
FN6824 Rev 2.00
August 13, 2015
V
L
Page 2 of 20
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E, ISL32374E, ISL32179E
Ordering Information
(Continued)
PART NUMBER
(Notes
1, 2, 3)
ISL32372EFBZ
(No longer available or supported)
ISL32372EFVZ
(No longer available or supported)
ISL32372EIBZ
(No longer available or supported)
ISL32372EIVZ
(No longer available or supported)
ISL32374EFBZ
(No longer available or supported)
ISL32374EFVZ
(No longer available or supported)
ISL32374EIBZ
(No longer available or supported)
ISL32374EIVZ
(No longer available or supported)
NOTES:
1. Add “-T” suffix for tape and reel. Please refer to
TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J
STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E,
ISL32374E, ISL32179E.
For more information on MSL, please see tech brief
TB363.
PART
MARKING
ISL32372 EFBZ
32372 EFVZ
ISL32372 EIBZ
32372 EIVZ
ISL32374 EFBZ
32374 EFVZ
ISL32374 EIBZ
32374 EIVZ
TEMP. RANGE
(°C)
-40 to +125
-40 to +125
-40 to +85
-40 to +85
-40 to +125
-40 to +125
-40 to +85
-40 to +85
PACKAGE
(RoHS Compliant)
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
PKG.
DWG. #
M16.15
MDP0044
M16.15
MDP0044
M16.15
MDP0044
M16.15
MDP0044
Truth Tables
ISL32172E, ISL32272E, ISL32372E
INPUTS
EN
X
1
0
EN
0
X
1
DIX
1/0
0/1
X
ZX
0/1
1/0
Z
OUTPUTS
YX
1/0
0/1
Z
INPUTS
ENX EN EN DIX SPA SPB ZX YX
0
X
1
1
1
ISL32174E, ISL32274E, ISL32374E
INPUTS
EN12 EN34 DIX
0
0
1
1
0
1
0
1
X
1/0
1/0
1/0
Z1
Z
Z
0/1
0/1
Y1
Z
Z
1/0
1/0
Z2
Z
Z
0/1
0/1
OUTPUTS
Y2
Z
Z
1/0
1/0
Z3
Z
0/1
Z
0/1
Y3
Z
1/0
Z
1/0
Z4
Z
0/1
Z
0/1
Y4
Z
1/0
Z
1/0
1
1
1
X
0
X
1
X
1
X
1
X
1
0
X
0
X
0
X
X
X
1/0
0/1
1/0
0/1
1/0
0/1
X
X
1
1
0
0
X*
X*
X
X
1
1
1
1
0
0
Z
Z
ISL32179E
OUTPUTS
COMMENTS
Z Chan X outputs disabled
Z All outputs disabled
NOTE: Z = Tri-state
0/1 1/0 Individual ENX controls
chan X (32Mbps)
1/0 0/1
0/1 1/0 Individual ENX controls
chan X (10Mbps)
1/0 0/1
0/1 1/0 Individual ENX controls
chan X (460kbps)
1/0 0/1
NOTE: *Keep SPA = 1 for lowest current in SHDN. If using individual
channel enables, and the SHDN mode, connect EN and EN to V
CC
for the lowest SHDN current. ISL32179E enters SHDN when
SHDNEN = 1 and all channels are disabled. Z = Tri-state.
NOTE: Z = Tri-state
FN6824 Rev 2.00
August 13, 2015
Page 3 of 20
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E, ISL32374E, ISL32179E
Pin Descriptions
PIN
EN, EN
FUNCTION
Group driver output enables, that are internally pulled high to V
CC
. All ISL32x72E driver outputs, Y and Z, are enabled by driving EN
high OR EN low, and the outputs are high impedance when EN is low AND EN is high (i.e., if using only the active high EN, connect
EN directly to V
CC
or V
L
; if using only the active low EN, connect EN directly to GND). On the ISL32179E accomplish group enable
by connecting all the ENX pins to V
CC
or V
L
, and then use the EN or EN pin as previously described. If the group driver enable
function isn’t required (see
Note 4),
connect EN to V
CC
, or connect EN to GND. (ISL32x72E and ISL32179E only)
Paired driver output enables, that are internally pulled high to V
CC
. Driving EN12 (EN34) high enables Channel 1 and 2 (3 and 4)
outputs (Y and Z). Driving EN12 (EN34) low disables Channel 1 and 2 (3 and 4) outputs. If the driver enable function isn’t required
(see
Note 4),
connect EN12 and EN34 to V
CC
. (ISL32x74E only)
Individual driver output enables that are internally pulled high to V
CC
. Forcing ENx high (along with EN high OR EN low) enables the
channel X outputs (Y and Z). Driving ENX low disables the Channel X outputs, regardless of the states of EN and EN. Connect both
EN and EN to V
CC
for the lowest SHDN current if utilizing SHDN mode (see SHDNEN below). If the individual driver enable function
isn’t required (see
Note 4),
connect ENX to V
CC
. (ISL32179E only)
Low power SHDN mode enable. A high level allows the ISL32179E to enter a low power mode when all channels are disabled. A low
level prevents the device from entering the low power mode. (ISL32179E only)
Driver input. A low on DI forces the corresponding channel’s output Y low and output Z high. Similarly, a high on DI forces output Y
high and output Z low.
Speed select inputs that are internally pulled-high. See ISL32179E Truth Table on
page 3.
(ISL32179E only)
Ground connection. This is also the potential of the QFN thermal pad.
±16.5kV IEC61000-4-2 ESD Protected RS-422 level, noninverting transmitter output.
±16.5kV IEC61000-4-2 ESD Protected RS-422 level, inverting transmitter output.
System power supply input (3.0V to 5.5V). On devices with a V
L
pin powered from a separate supply, power-up V
CC
first.
Logic power supply input. Connecting the V
L
pin to the lower voltage power supply of a logic device (e.g., UART or µcontroller)
interfacing with the ISL32179E tailors its logic pin (DI, EN (all varieties), SHDNEN, and SP) V
IL
/V
IH
levels to values compatible with
the lower supply voltage. If V
L
and V
CC
are different supplies, power-up this supply after V
CC
, and keep V
L
≤ V
CC
. (ISL32179E only)
Thermal Pad. Connect the EP to GND. (ISL32179E only)
EN12,
EN34
ENx
SHDNEN
DIx
SPA, SPB
GND
Yx
Zx
V
CC
V
L
EP
NOTE:
4. Unused EN pins of any type should not be left floating, even though they have internal pull-ups.
FN6824 Rev 2.00
August 13, 2015
Page 4 of 20
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E, ISL32374E, ISL32179E
Typical Operating Circuits (1 of 4 Channels Shown)
+3.3V TO 5V
+
16
V
CC
ISL32x73E
3 RO
12 EN
A
R
B
2
1
R
T
2
3
Y
Z
D
0.1µF
0.1µF
+
16
V
CC
ISL32x72E
DI 1
EN 4
EN 12
GND
8
EN
4
GND
8
+3.3V TO 5V
FIGURE 1. NETWORK USING GROUP ENABLES
+3.3V TO 5V
+
16
V
CC
ISL32x75E
3 RO1
4
EN12
A1 2
R
B1 1
R
T
0.1µF
0.1µF
+
+3.3V TO 5V
16
V
CC
ISL32x74E
2
3
Y1
Z1
D
DI1 1
EN12 4
GND
8
GND
8
FIGURE 2. NETWORK USING PAIRED ENABLES
1.8V
+3.3V TO 5V
+
0.1µF
0.1µF
+
+3.3V TO 5V
21
V
CC
2.5V
20
V
CC
V
CC
22
21
V
CC
V
L
SHDNEN
9
15 EN
4 EN
1 RO1
2 EN1
GND
10
ISL32x77E
A1 24
R
B1 23
LOGIC
DEVICE
(µP, ASIC,
UART)
R
T
24
1
V
L
SHDNEN 22
ISL32179E
EN 14
EN1-EN4 2, 3,15,16
Y
DI 23
Z
D
EN 4
GND
9
LOGIC
DEVICE
µP, ASIC,
UART)
USING INDIVIDUAL CHANNEL ENABLES AND
CONFIGURED FOR LOWEST SHDN SUPPLY CURRENT
NOTE: IF POWERED FROM SEPARATE SUPPLIES,
POWER-UP V
CC
BEFORE V
L
USING ACTIVE HIGH GROUP ENABLE AND
CONFIGURED FOR LOWEST SHDN SUPPLY CURRENT
NOTE: IF POWERED FROM SEPARATE SUPPLIES,
POWER-UP V
CC
BEFORE V
L
FIGURE 3. NETWORK WITH V
L
PIN FOR INTERFACING TO LOWER VOLTAGE LOGIC DEVICES
FN6824 Rev 2.00
August 13, 2015
Page 5 of 20
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