ISL32172E, ISL32272E, ISL32372E, ISL32174E,
ISL32274E, ISL32374E, ISL32179E
Data Sheet
March 13, 2013
FN6824.1
QUAD, ±16.5kV ESD Protected, 3.0V
to 5.5V, Low Power, RS-422 Transmitters
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.
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
PART
NUMBER
ISL32172E
ISL32272E
ISL32372E
ISL32174E
ISL32274E
ISL32374E
ISL32179E
DATA RATE
(Mbps)
32
10
0.46
32
10
0.46
32, 10, 0.46
SLEW-RATE
LIMITED?
NO
NO
YES
NO
NO
YES
SELECTABLE
HOT
PLUG?
YES
YES
YES
YES
YES
YES
YES
TX
ENABLE
TYPE
EN, EN
EN, EN
EN, EN
EN12, EN34
EN12, EN34
EN12, EN34
INDIV. AND
GROUP
ENABLES
QUIESCENT
I
CC
(mA)
<1
<1
<1
<1
<1
<1
<1
LOW POWER
SHUTDOWN?
NO
NO
NO
NO
NO
NO
YES
PIN
COUNT
16
16
16
16
16
16
24
FUNCTION
4 Tx
4 Tx
4 Tx
4 Tx
4 Tx
4 Tx
4 Tx
V
L
PIN?
NO
NO
NO
NO
NO
NO
YES
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2008, 2013. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
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
ISL32174EFBZ
ISL32174EFVZ
ISL32174EIBZ
ISL32174EIVZ
ISL32179EFRZ
ISL32179EIRZ
ISL32272EFBZ
ISL32272EFVZ
ISL32272EIBZ
ISL32274EFBZ
PART
MARKING
ISL32172 EFBZ
32172 EFVZ
ISL32172 EIBZ
32172 EIVZ
ISL32174 EFBZ
32174 EFVZ
ISL32174 EIBZ
32174 EIVZ
321 79EFRZ
321 79EIRZ
ISL32272 EFBZ
32272 EFVZ
ISL32272 EIBZ
ISL32274 EFBZ
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
-40 to +125
-40 to +85
-40 to +125
-40 to +125
-40 to +85
-40 to +125
PACKAGE
(Pb-Free)
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
24 Ld QFN
24 Ld QFN
16 Ld SOIC
16 Ld TSSOP
16 Ld SOIC
16 Ld SOIC
PKG.
DWG. #
M16.15
MDP0044
M16.15
MDP0044
M16.15
MDP0044
M16.15
MDP0044
L24.4x4C
L24.4x4C
M16.15
MDP0044
M16.15
M16.15
2
V
L
FN6824.1
March 13, 2013
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E, ISL32374E, ISL32179E
Ordering Information
(Continued)
PART NUMBER
(Notes 1, 2, 3)
ISL32274EFVZ
ISL32274EIBZ
ISL32274EIVZ
ISL32372EFBZ
ISL32372EFVZ
ISL32372EIBZ
ISL32372EIVZ
ISL32374EFBZ
ISL32374EFVZ
ISL32374EIBZ
ISL32374EIVZ
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
32274 EFVZ
ISL32274 EIBZ
32274 EIVZ
ISL32372 EFBZ
32372 EFVZ
ISL32372 EIBZ
32372 EIVZ
ISL32374 EFBZ
32374 EFVZ
ISL32374 EIBZ
32374 EIVZ
TEMP. RANGE
(°C)
-40 to +125
-40 to +85
-40 to +85
-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
(Pb-Free)
16 Ld TSSOP
16 Ld SOIC
16 Ld TSSOP
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. #
MDP0044
M16.15
MDP0044
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
ISL32179E
OUTPUTS
COMMENTS
ENX EN EN DIX SPA SPB ZX YX
0
X
1
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
Z Chan X outputs disabled
Z All outputs disabled
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: Z = Tri-state
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
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
3
FN6824.1
March 13, 2013
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), 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), 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), 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: Unused EN pins of any type should not be left floating, even though they have internal pull-ups.
4
FN6824.1
March 13, 2013
ISL32172E, ISL32272E, ISL32372E, ISL32174E, ISL32274E, ISL32374E, ISL32179E
Typical Operating Circuits (1 of 4 Channels Shown)
NETWORK USING GROUP ENABLES
+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
NETWORK USING PAIRED ENABLES
+3.3V TO 5V
+
16
V
CC
ISL32x75E
3 RO1
4
EN12
A1 2
R
B1 1
R
T
2
3
0.1µF
0.1µF
+
16
V
CC
ISL32x74E
Y1
Z1
D
DI1 1
+3.3V TO 5V
EN12 4
GND
8
GND
8
NETWORK WITH V
L
PIN FOR INTERFACING TO LOWER VOLTAGE LOGIC DEVICES
1.8V
21
V
CC
+3.3V TO 5V
+
22
V
CC
V
L
9 SHDNEN
15 EN
4 EN
1 RO1
2 EN1
GND
10
ISL32x77E
A1 24
R
B1 23
R
T
24
1
0.1µF
0.1µF
+
20
V
L
SHDNEN 22
ISL32179E
EN 14
EN1-EN4 2,3,15,16
Y
DI 23
Z
D
EN 4
V
CC
GND
9
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
21
V
CC
+3.3V TO 5V
2.5V
LOGIC
DEVICE
(µP, ASIC,
UART)
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
5
FN6824.1
March 13, 2013
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