DATASHEET
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491
3.3V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
These Renesas RS-485/RS-422 devices are BiCMOS 3.3V
powered, single transceivers that meet both the RS-485 and
RS-422 standards for balanced communication. Unlike
competitive devices, this Renesas family is specified for 10%
tolerance supplies (3V to 3.6V).
The
ISL83483
and
ISL83488
use slew rate limited drivers
which reduce EMI, and minimize reflections from improperly
terminated transmission lines, or unterminated stubs in
multidrop and multipoint applications.
Data rates up to 10Mbps are achievable by using the
ISL83485, ISL83490,
or
ISL83491,
which feature higher
slew rates.
Logic inputs (for example, DI and DE) accept signals in
excess of 5.5V, making them compatible with 5V logic
families.
Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high output if Rx inputs are floating. All
devices present a “single unit load” to the RS-485 bus, which
allows up to 32 transceivers on the network.
Driver (Tx) outputs are short-circuit protected, even for
voltages exceeding the power supply voltage. Additionally,
on-chip thermal shutdown circuitry disables the Tx outputs to
prevent damage if power dissipation becomes excessive.
The ISL83488, ISL83490, and ISL83491 are configured for
full duplex (separate Rx input and Tx output pins)
applications. The ISL83488 and ISL83490 are offered in
space saving 8 Ld packages for applications not requiring Rx
and Tx output disable functions (for example, point-to-point
and RS-422). Half duplex configurations (ISL83483,
ISL83485) multiplex the Rx inputs and Tx outputs to provide
transceivers with Rx and Tx disable functions in 8 Ld
packages.
FN6052
Rev 4.00
Jul 27, 2018
Features
• Operate from a single +3.3V supply (10% tolerance)
• Interoperable with 5V Logic
• High data rates . . . . . . . . . . . . . . . . . . . . . . up to 10Mbps
• Single unit load allows up to 32 devices on the bus
• Slew rate limited versions for error free data transmission
(ISL83483, ISL83488) . . . . . . . . . . . . . . . . .up to 250kbps
• Low current Shutdown mode (ISL83483, ISL83485,
ISL83491). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15nA
• -7V to +12V common-mode input voltage range
• Three-state Rx and Tx outputs (except ISL83488,
ISL83490)
• 10ns propagation delay, 1ns skew (ISL83485, ISL83490,
ISL83491)
• Full duplex and half duplex pinouts
• Current limiting and thermal shutdown for driver overload
protection
• Pb-free (RoHS compliant)
Applications
• Factory automation
• Security networks
• Building environmental control systems
• Industrial/process control networks
• Level translators (for example, RS-232 to RS-422)
• RS-232 “Extension Cords”
Related Literature
For a full list of related documents, visit our website
•
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491
product pages
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
ISL83483
ISL83485
ISL83488
ISL83490
ISL83491
HALF/FULL
DUPLEX
Half
Half
Full
Full
Full
DATA RATE
(Mbps)
0.25
10
0.25
10
10
SLEW-RATE
LIMITED?
Yes
No
Yes
No
No
RECEIVER/DRIVER
ENABLE?
Yes
Yes
No
No
Yes
QUIESCENT I
CC
(mA)
0.65
0.65
0.65
0.65
0.65
LOW POWER
SHUTDOWN?
Yes
Yes
No
No
Yes
PIN COUNT
8
8
8
8
14
FN6052 Rev 4.00
Jul 27, 2018
Page 1 of 19
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491
Ordering Information
PART NUMBER
(Notes
2, 3)
ISL83483IBZ
ISL83483IBZ-T
ISL83483IBZ-T7A
ISL83483IP (No longer available or supported)
ISL83485IBZ
ISL83485IBZ-T
ISL83485IBZ-T7A
ISL83488IBZ
ISL83488IBZ-T
ISL83490IBZ
ISL83490IBZ-T
ISL83491IBZ
ISL83491IBZ-T
ISL83491IBZ-T7A
ISL83491IP (No longer available, recommended
replacement: ISL83491IBZ)
NOTES:
1. Refer to
TB347
for details about reel specifications.
2. These 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). 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
ISL83483, ISL83485, ISL83488, ISL83490,
and
ISL83491
product information pages. For more
information about MSL, refer to
TB363.
83485IB
83485IB
83485IB
83488IB
83488IB
83490IB
83490IB
83491IBZ
83491IBZ
83491IBZ
PART
TAPE AND REEL
MARKING TEMP. RANGE (°C) (UNITS) (Note
1)
83483IB
83483IB
83483IB
-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
-40 to +85
-40 to +85
-40 to +85
-
2.5k
250
-
-
2.5k
250
-
2.5k
-
2.5k
-
2.5k
250
-
PACKAGE
8 Ld SOIC (RoHS compliant)
8 Ld SOIC (RoHS compliant)
8 Ld SOIC (RoHS compliant)
8 Ld PDIP
8 Ld SOIC (RoHS compliant)
8 Ld SOIC (RoHS compliant)
8 Ld SOIC (RoHS compliant)
8 Ld SOIC (RoHS compliant)
8 Ld SOIC (RoHS compliant)
8 Ld SOIC (RoHS compliant)
8 Ld SOIC (RoHS compliant)
PKG.
DWG. #
M8.15
M8.15
M8.15
E8.3
M8.15
M8.15
M8.15
M8.15
M8.15
M8.15
M8.15
14 Ld SOIC (RoHS compliant) M14.15
14 Ld SOIC (RoHS compliant) M14.15
14 Ld SOIC (RoHS compliant) M14.15
14 Ld PDIP
E14.3
FN6052 Rev 4.00
Jul 27, 2018
Page 2 of 19
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491
Pinouts
ISL83483, ISL83485 (PDIP (No longer
available or supported), SOIC)
TOP VIEW
RO 1
RE 2
DE 3
DI 4
D
8
7
6
5
V
CC
B/Z
A/Y
GND
ISL83488, ISL83490 (SOIC)
TOP VIEW
V
CC
1
RO 2
DI 3
GND 4
D
8
7
6
5
A
B
Z
Y
ISL83491 (PDIP (No longer available or
supported), SOIC)
TOP VIEW
NC 1
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
D
R
14 V
CC
13 V
CC
12 A
11 B
10 Z
9 Y
8 NC
R
R
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 *
OUTPUTS
Y
1
0
High-Z
High-Z *
0
0
0
1
1
RE
RECEIVING
INPUTS
DE
Half Duplex
0
0
0
0
1
DE
Full Duplex
X
X
X
0
1
A-B
≥ +0.2V
≤ -0.2V
Inputs Open
X
X
OUTPUT
RO
1
0
1
High-Z *
High-Z
NOTE: *Shutdown Mode for ISL83483, ISL83485, ISL83491
NOTE: *Shutdown Mode for ISL83483, ISL83485, ISL83491
Pin Descriptions
PIN
RO
RE
DE
DI
GND
A/Y
B/Z
A
B
Y
Z
V
CC
NC
FUNCTION
Receiver output: If A > B by at least 0.2V, RO is high; If A < B by 0.2V or more, RO is low; RO = High if A and B are unconnected (floating).
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.
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.
Noninverting receiver input and noninverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1.
Inverting receiver input and inverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1.
Noninverting receiver input.
Inverting receiver input.
Noninverting driver output.
Inverting driver output.
System power supply input (3V to 3.6V).
No Connection.
FN6052 Rev 4.00
Jul 27, 2018
Page 3 of 19
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491
Typical Operating Circuits
For calculating the resistor values refer to
TB509,
“Detecting Bus Signals Correctly with Failsafe Biased RS-485 Receivers”
3.3V
100nF
R
B
A/Y 6
2 RE
3 DE
4 DI
R
B
GND
5
GND
5
B/Z 7
R
T2
V
FS
R
T1
7 B/Z
6 A/Y
RE 2
DE 3
DI 4
100nF
3.3V
R
PU
1 RO
8
V
CC
8
V
CC
RO 1
R
PU
FIGURE 1. ISL83483, ISL83485
3.3V
100nF
A 8
R
T
100nF
5
Y
3.3V
1
V
CC
2 RO
1
V
CC
DI
3
B 7
Z 6
3 DI
Y 5
GND
4
6
Z
7 B
R
T
RO 2
8 A
GND
4
FIGURE 2. ISL83488, ISL83490
3.3V
100nF
R
B
A 12
R
T
R
B
9 Y
100nF
3.3V
R
PU
2 RO
3 RE
4 DE
5 DI
13, 14
V
CC
13,14
V
CC
DI 5
R
PU
B 11
Z 10
10 Z
11 B
R
T
DE 4
RE 3
RO 2
Y 9
GND
6, 7
R
B
12 A
GND
6, 7
R
B
FIGURE 3. ISL83491
FN6052 Rev 4.00
Jul 27, 2018
Page 4 of 19
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491
Absolute Maximum Ratings
V
CC
to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to +7V
Input/Output Voltages
A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (V
CC
+0.5V)
Short-Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
Thermal Information
Thermal Resistance (Typical,
Note 4)
JA
(°C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . .
170
8 Ld PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . .
140
14 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . .
130
14 Ld PDIP Package . . . . . . . . . . . . . . . . . . . . . . . .
105
Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . . . . see
TB493
Operating Conditions
Temperature Range
ISL834XXIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
4.
JA
is measured with the component mounted on a low effective thermal conductivity test board in free air. See
TB379.
Note 5.
Electrical Specifications
Test Conditions: V
CC
= 3V to 3.6V; unless otherwise specified. Typicals are at V
CC
= 3.3V, T
A
= +25°C,
PARAMETER
DC CHARACTERISTICS
Driver Differential V
OUT
(no load)
Driver Differential V
OUT
(with load)
V
OD1
V
OD2
R
L
= 100Ω (RS-422) (Figure
4A)
R
L
= 54Ω (RS-485) (Figure
4A)
R
L
= 60Ω, -7V ≤ V
CM
≤ 12V (Figure
4B)
Change in Magnitude of Driver
Differential V
OUT
for
Complementary Output States
Driver Common-Mode V
OUT
Change in Magnitude of Driver
Common-Mode V
OUT
for
Complementary Output States
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
V
OD
R
L
= 54Ω or 100Ω (Figure
4A)
Full
Full
Full
Full
Full
-
2
1.5
1.5
-
-
2.7
2.3
2.6
0.01
V
CC
-
V
CC
-
0.2
V
V
V
V
V
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNIT
V
OC
V
OC
R
L
= 54Ω or 100Ω (Figure
4A)
R
L
= 54Ω or 100Ω (Figure
4A)
Full
Full
-
-
1.8
0.01
3
0.2
V
V
V
IH
V
IL
I
IN1
I
IN2
I
IN3
I
IN3
V
TH
V
TH
V
OH
V
OL
DE, DI, RE
DE, DI, RE
DE, DI
RE
Full
Full
Full
Full
V
IN
= 12V
V
IN
= -7V
Full
Full
Full
Full
Full
Full
Full
+25
Full
Full
2
-
-2
-25
-
-
-
-20
-
-1
-0.2
-
V
CC
-
0.4
-
-
-
-
-
0.6
-0.3
14
-11
0.03
-0.01
-
50
-
-
-
0.8
2
25
1
-0.8
20
-
1
-
0.2
-
-
0.4
V
V
µA
µA
mA
mA
µA
µA
µA
µA
V
mV
V
V
Input Current (A, B)
DE = 0V, V
CC
= 0V or 3.6V
Output Leakage Current (Y, Z)
(ISL83491)
Output Leakage Current (Y, Z)
in Shutdown Mode (ISL83491)
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
RE = 0V, DE = 0V, V
CC
= 0V or 3.6V V
IN
= 12V
V
IN
= -7V
RE = V
CC
, DE = 0V, V
CC
= 0V or 3.6V V
IN
= 12V
V
IN
= -7V
-7V ≤ V
CM
≤ 12V
V
CM
= 0V
I
O
= -4mA, V
ID
= 200mV
I
O
= -4mA, V
ID
= 200mV
FN6052 Rev 4.00
Jul 27, 2018
Page 5 of 19
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