DATASHEET
ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E
±60V Fault Protected, 5V, RS-485/RS-422 Transceivers with ±25V CMR and ESD Protection
The
ISL32490E, ISL32492E, ISL32493E, ISL32495E,
ISL32496E, ISL32498E
are fault protected, 5V powered,
differential transceivers that exceed the RS-485 and RS-422
standards for balanced communication. The RS-485 transceiver
pins (driver outputs and receiver inputs) are fault protected up to
±60V and are protected against ±16.5kV ESD strikes without
latch-up. Additionally, the extended Common Mode Range
(CMR) allows these transceivers to operate in environments with
common mode voltages up to ±25V (>2x the RS-485
requirement), making this fault protected RS-485 family one of
the most robust on the market.
Transmitters (Tx) deliver an exceptional 2.5V (typical)
differential output voltage into the RS-485 specified 54Ω load.
This yields better noise immunity than standard RS-485 ICs, or
allows up to six 120Ω terminations in star network topologies.
Receiver (Rx) inputs feature a “full fail-safe” design that ensures
a logic high Rx output if Rx inputs are floating, shorted, or on a
terminated but undriven (idle) bus. Rx outputs have high drive
levels; typically, 15mA at V
OL
= 1V (for opto-coupled, isolated
applications).
Half duplex (Rx inputs and Tx outputs multiplexed together)
and full duplex pinouts are available. Refer to
Table 1 on
page 2
for key features and configurations by device number.
For fault protected or wide common mode range RS-485
transceivers with cable invert (polarity reversal) pins, refer to
the
ISL32483E
datasheet.
FN7786
Rev.5.00
Sep 18, 2017
Features
• Fault protected RS-485 bus pins . . . . . . . . . . . . . . up to ±60V
• Extended CMR . . . . . . . . . . ±25V (more than twice the range
required for RS-485)
• ±16.5kV HBM ESD protection on RS-485 bus pins
• 1/4 unit load for up to 128 devices on the bus
• High transient overvoltage tolerance. . . . . . . . . . . . . . . . ±80V
• Full fail-safe (open, short, terminated) RS-485 receivers
• High Rx I
OL
for opto-couplers in isolated designs
• Hot plug circuitry; Tx and Rx outputs remain three-state
during power-up/power-down
• Choice of RS-485 data rates. . . . . . . . . . 250kbps to 15Mbps
• Low quiescent supply current. . . . . . . . . . . . . . . . . . . . 2.3mA
• Ultra low shutdown supply current. . . . . . . . . . . . . . . . . . 10µA
Applications
• Utility meters/automated meter reading systems
• High node count RS-485 systems
• PROFIBUS and RS-485 based field bus networks, and factory
automation
• Security camera networks
• Building lighting and environmental control systems
• Industrial/process control networks
Related Literature
• For a full list of related documents, visit our website
-
ISL32490E, ISL32492E, ISL32493E, ISL32495E,
ISL32496E,
and
ISL32498E
product pages
30
B
25
20
VOLTAGE (V)
15
10
5
RO
0
-5
TIME (20ns/DIV)
A
V
ID
= ±1V
25
COMMON MODE RANGE
12
0
-7
-12
-20
-25
STANDARD RS-485
TRANSCEIVER
CLOSEST
COMPETITOR
ISL3249xE
FIGURE 1. EXCEPTIONAL Rx OPERATES AT >15Mbps EVEN WITH A
±25V COMMON MODE VOLTAGE
FIGURE 2. ISL3249xE DELIVERS SUPERIOR COMMON MODE
RANGE vs STANDARD RS-485 DEVICES
FN7786 Rev.5.00
Sep 18, 2017
Page 1 of 22
ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E
TABLE 1. SUMMARY OF FEATURES
PART NUMBER
ISL32490E
ISL32492E
ISL32493E
ISL32495E
ISL32496E
ISL32498E
HALF/FULL
DUPLEX
Full
Half
Full
Half
Full
Half
DATA RATE
(Mbps)
0.25
0.25
1
1
15
15
SLEW-RATE
LIMITED?
Yes
Yes
Yes
Yes
No
No
EN PINS?
Yes
Yes
Yes
Yes
Yes
Yes
HOT
PLUG?
Yes
Yes
Yes
Yes
Yes
Yes
QUIESCENT I
CC
(mA)
2.3
2.3
2.3
2.3
2.3
2.3
LOW POWER
SHDN?
Yes
Yes
Yes
Yes
Yes
Yes
PIN COUNT
10, 14
8
10, 14
8
10, 14
8
Ordering Information
PART NUMBER
(Notes
1, 2, 3)
ISL32490EIBZ
ISL32490EIUZ
ISL32492EIBZ
ISL32492EIUZ
ISL32493EIBZ
ISL32493EIUZ
ISL32495EIBZ
ISL32495EIUZ
ISL32496EIBZ
ISL32496EIUZ
ISL32498EIBZ
ISL32498EIUZ
NOTES:
1. Add “-T” suffix for 2.5k unit or “-T7A” suffix for 250 unit tape and reel option. 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), refer to the product information pages for
ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E.
For more information on MSL, refer to
TB363.
PART
MARKING
ISL32490 EIBZ
2490E
32492 EIBZ
2492E
ISL32493 EIBZ
2493E
32495 EIBZ
2495E
ISL32496 EIBZ
2496E
32498 EIBZ
2498E
TEMP. RANGE
(°C)
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
PACKAGE
(RoHS COMPLIANT)
14 Ld SOIC
10 Ld MSOP
8 Ld SOIC
8 Ld MSOP
14 Ld SOIC
10 Ld MSOP
8 Ld SOIC
8 Ld MSOP
14 Ld SOIC
10 Ld MSOP
8 Ld SOIC
8 Ld MSOP
PKG.
DWG. #
M14.15
M10.118
M8.15
M8.118
M14.15
M10.118
M8.15
M8.118
M14.15
M10.118
M8.15
M8.118
FN7786 Rev.5.00
Sep 18, 2017
Page 2 of 22
ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E
Pin Configurations
ISL32492E, ISL32495E, ISL32498E
(8 LD MSOP, 8 LD SOIC)
TOP VIEW
RO
RE
DE
DI
1
2
3
4
D
R
8
7
6
5
VCC
B/Z
A/Y
GND
ISL32490E, ISL32493E, ISL32496E
(10 LD MSOP)
TOP VIEW
RO 1
RE 2
DE 3
DI 4
GND 5
D
R
10 V
CC
9 A
8 B
7 Z
6 Y
ISL32490E, ISL32493E, ISL32496E
(14 LD SOIC)
TOP VIEW
NC 1
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
D
R
14 VCC
13 VCC
12 A
11 B
10 Z
9 Y
8 NC
NOTE: Evaluate creepage and clearance requirements at your maximum fault voltage before using small pitch packages such as MSOP.
Truth Tables
TRANSMITTING
INPUTS
RE
X
X
0
1
DE
1
1
0
0
DI
1
0
X
X
Z
0
1
High-Z
High-Z
(see Note)
OUTPUTS
Y
1
0
High-Z
High-Z
(see Note)
RE
0
0
0
0
1
1
0
0
0
0
0
1
X
X
X
X
0
1
RECEIVING
INPUTS
DE
DE
Half Duplex Full Duplex
A-B
V
AB
≥
-0.01V
V
AB
≤
-0.2V
Inputs
Open/Shorted
X
X
OUTPUT
RO
1
0
1
High-Z
(see Note)
High-Z
-0.01V > V
AB
> -0.2V Undetermined
NOTE: Low Power Shutdown Mode (see
Note 11 on page 9).
NOTE: Low Power Shutdown Mode (see
Note 11 on page 9).
Pin Descriptions
PIN
NAME
RO
RE
DE
DI
GND
A/Y
B/Z
A
B
Y
8 LD
PIN #
1
2
3
4
5
6
7
-
-
-
10 LD
PIN #
1
2
3
4
5
-
-
9
8
6
14 LD
PIN #
2
3
4
5
6, 7
-
-
12
11
9
FUNCTION
Receiver output. If A-B
≥
-10mV, RO is high; if A-B
≤
-200mV, RO is low; if A and B are unconnected (floating),
shorted together, or connected to an undriven, terminated bus, RO is high.
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. They are high
impedance when DE is low. Internally pulled high.
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.
Ground connection.
±60V fault and ±16.5kV HBM ESD protected RS-485/RS-422 level, non-inverting receiver input and
non-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, inverting receiver input and 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, non-inverting receiver input.
±60V fault and ±15kV HBM ESD protected RS-485/RS-422 level, inverting receiver input.
±60V fault and ±15kV HBM ESD protected RS-485/RS-422 level, non-inverting driver output.
FN7786 Rev.5.00
Sep 18, 2017
Page 3 of 22
ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E
Pin Descriptions
(Continued)
PIN
NAME
Z
VCC
NC
8 LD
PIN #
-
8
-
10 LD
PIN #
7
10
-
14 LD
PIN #
10
FUNCTION
±60V fault and ±15kV HBM ESD protected RS-485/RS-422 level, inverting driver output.
13, 14 System power supply input (4.5V to 5.5V).
1, 8
No internal connection.
Typical Operating Circuits
+5V
+
8
V
CC
1 RO
2 RE
3 DE
4 DI
D
GND
5
GND
5
R
B/Z
A/Y
7
6
R
T
R
T
7
6
B/Z
A/Y
R
0.1µF
0.1µF
+
8
V
CC
D
DI 4
DE 3
RE 2
RO 1
+5V
FIGURE 3. ISL32492E, ISL32495E, ISL32498E HALF DUPLEX EXAMPLE
+5V
+
13, 14
V
CC
2 RO
3 RE
4 DE
5 DI
Z 10
D
GND
6, 7
Y 9
R
T
11 B
12 A
R
A 12
B 11
0.1µF
R
T
0.1µF
+
+5V
13, 14
9 Y
10 Z
V
CC
D
DI 5
DE 4
RE 3
R
RO 2
GND
6, 7
FIGURE 4. ISL32490E, ISL32493E, ISL32496E FULL DUPLEX EXAMPLE (SOIC PIN NUMBERS SHOWN)
FN7786 Rev.5.00
Sep 18, 2017
Page 4 of 22
ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E
Absolute Maximum Ratings
V
CC
to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
CC
+ 0.3V)
Input/Output Voltages
A/Y, B/Z, A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±60V
A/Y, B/Z, A, B, Y, Z (Transient Pulse Through 100Ω, (Note
15).
. . . ±80V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
CC
+0.3V)
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Rating . . . . . . . . . . . . . . . . . . . . see
“ESD PERFORMANCE” on page 6
Latch-up (Tested per JESD78, Level 2, Class A) . . . . . . . . . . . . . . . +125°C
Thermal Information
Thermal Resistance (Typical)
JA
(°C/W)
JC
(°C/W)
8 Ld MSOP Package (Notes
4, 5)
. . . . . . . .
140
40
8 Ld SOIC Package (Notes
4, 5)
. . . . . . . . .
108
47
10 Ld MSOP Package (Notes
4, 5)
. . . . . . .
135
50
14 Ld SOIC Package (Notes
4, 5)
. . . . . . . .
88
39
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . . . -65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to
TB493
Recommended Operating Conditions
Supply Voltage (V
CC
). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Bus Pin Common Mode Voltage Range. . . . . . . . . . . . . . . . . . -25V to +25V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4.
JA
is measured with the component mounted on a high-effective thermal conductivity test board in free air. Refer to
TB379
for details.
5. For
JC
, the “case temp” location is taken at the package top center.
V
CC
= 4.5V to 5.5V; unless otherwise specified. Typical values are at V
CC
= 5V, T
A
= +25°C (Note
6).
Boldface
limits apply across the operating temperature range, -40°C to +85°C.
SYMBOL
DC CHARACTERISTICS
V
OD1
V
OD2
Driver Differential V
OUT
(No load)
Driver Differential V
OUT
(Loaded,
Figure 5A)
R
L
= 100Ω (RS-422)
R
L
= 54Ω (RS-485)
R
L
= 54Ω (PROFIBUS, V
CC
≥
5V)
R
L
= 21Ω (Six 120Ω Terminations for Star
Configurations, V
CC
≥
4.75V)
V
OD
Change in Magnitude of Driver R
L
= 54Ω or 100Ω (Figure
5A)
Differential V
OUT
for
Complementary Output
States
Driver Differential V
OUT
with
Common Mode Load
(Figure
5B)
Driver Common-Mode V
OUT
(Figure
5)
R
L
= 60Ω, -7V
≤
V
CM
≤
12V
R
L
= 60Ω, -25V
≤
V
CM
≤
25V (V
CC
≥
4.75V)
R
L
= 21Ω, -15V
≤
V
CM
≤
15V (V
CC
≥
4.75V)
V
OC
R
L
= 54Ω or 100Ω
R
L
= 60Ω or 100Ω, -20V
≤
V
CM
≤
20V
Full
Full
Full
Full
Full
Full
-
2.4
1.5
2.0
0.8
-
-
3.2
2.5
2.5
1.3
-
-
0.2
V
V
V
CC
-
V
CC
V
V
V
PARAMETER
TEST CONDITIONS
TEMP
(°C)
MIN
(Note
14)
TYP
MAX
(Note
14)
UNITS
Electrical Specifications
V
OD3
Full
Full
Full
Full
Full
Full
1.5
1.7
0.8
-1
-2.5
-
2.1
2.3
1.1
-
-
-
V
CC
V
-
3
5
0.2
V
V
V
V
V
OC
Change in Magnitude of Driver R
L
= 54Ω or 100Ω (Figure
5A)
Common Mode V
OUT
for
Complementary Output
States
Driver Short-circuit Current
DE = V
CC
, -25V
≤
V
O
≤
25V (Note
8)
At First Fold-back, 22V
≤
V
O
≤
-22V
At Second Fold-back,
35V
≤
V
O
≤
-35V
Logic Input High Voltage
Logic Input Low Voltage
DE, DI, RE
DE, DI, RE
I
OSD
I
OSD1
I
OSD2
V
IH
V
IL
Full
Full
Full
Full
Full
-250
-83
-13
2.5
-
-
-
-
-
-
250
83
13
-
0.8
mA
mA
mA
V
V
FN7786 Rev.5.00
Sep 18, 2017
Page 5 of 22
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