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ISL83070E, ISL83071E, ISL83072E, ISL83073E,
ISL83075E, ISL83076E, ISL83077E, ISL83078E
Data Sheet
October 5, 2012
FN6115.5
±15kV ESD Protected, 3.3V, Full Fail-safe,
Low Power, High Speed or Slew Rate
Limited, RS-485/RS-422 Transceivers
The Intersil ISL8307XE are BiCMOS 3.3V powered, single
transceivers that meet both the RS-485 and RS-422
standards for balanced communication. These devices have
very low bus currents (+125mA/-100mA), so they present a
true “1/8 unit load” to the RS-485 bus. This allows up to 256
transceivers on the network without violating the RS-485
specification’s 32 unit load maximum, and without using
repeaters. For example, in a remote utility meter reading
system, individual meter readings are routed to a
concentrator via an RS-485 network, so the high allowed
node count minimizes the number of repeaters required.
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic high Rx output if Rx inputs are floating,
shorted, or terminated but undriven.
Hot Plug circuitry ensures that the Tx and Rx outputs remain
in a high impedance state while the power supply stabilizes.
The ISL83070E through ISL83075E utilize slew rate limited
drivers which reduce EMI, and minimize reflections from
improperly terminated transmission lines, or unterminated
stubs in multidrop and multipoint applications. Slew rate limited
versions also include receiver input filtering to enhance noise
immunity in the presence of slow input signals.
The ISL83070E, ISL83071E, ISL83073E, ISL83076E,
ISL83077E
are configured for full duplex (separate Rx input
and Tx output pins) applications. The half duplex versions
multiplex the Rx inputs and Tx outputs to allow transceivers
with output disable functions in 8 lead packages.
Features
• Pb-Free (RoHS Compliant)
• RS-485 I/O Pin ESD Protection
. . . . . . . . . . . . . ±
15kV HBM
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
• Full Fail-safe (Open, Short, Terminated/Floating)
Receivers
• Hot Plug - Tx and Rx Outputs Remain Three-state During
Power-up (Only Versions with Output Enable Pins)
• True 1/8 Unit Load Allows up to 256 Devices on the Bus
• Single 3.3V Supply
• High Data Rates . . . . . . . . . . . . . . . . . . . . . . up to 20Mbps
• Low Quiescent Supply Current . . . . . . . . . . .800
μ
A (Max)
- Ultra Low Shutdown Supply Current . . . . . . . . . . .10nA
• -7V to +12V Common Mode Input/Output Voltage Range
• Half and Full Duplex Pinouts
• Three State Rx and Tx Outputs Available
• Current Limiting and Thermal Shutdown for driver
Overload Protection
• Tiny MSOP package offering saves 50% board space
Applications
• Automated Utility Meter Reading Systems
• High Node Count Systems
• Field Bus Networks
• Security Camera Networks
• Building Environmental Control/ Lighting Systems
• Industrial/Process Control Networks
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
ISL83070E
ISL83071E
ISL83072E
ISL83073E
ISL83075E
ISL83076E
ISL83077E
ISL83078E
HALF/FULL DATA RATE
DUPLEX
(Mbps)
FULL
FULL
HALF
FULL
HALF
FULL
FULL
HALF
0.25
0.25
0.25
0.5
0.5
20
20
20
SLEW-RATE
LIMITED?
YES
YES
YES
YES
YES
NO
NO
NO
HOT
PLUG?
YES
NO
YES
YES
YES
YES
NO
YES
# DEVICES
ON BUS
256
256
256
256
256
256
256
256
RX/TX
ENABLE?
YES
NO
YES
YES
YES
YES
NO
YES
QUIESCENT
I
CC
(μA)
510
510
510
510
510
510
510
510
LOW POWER
SHUTDOWN?
YES
NO
YES
YES
YES
YES
NO
YES
PIN
COUNT
14
8
8
14
8
14
8
8
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 Inc. 2005-2007, 2012. 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.
ISL83070E, ISL83071E, ISL83072E, ISL83073E, ISL83075E, ISL83076E, ISL83077E, ISL83078E
Pinouts
ISL83072E, ISL83075E, ISL83078E
(8 LD MSOP, SOIC)
TOP VIEW
RO 1
RE 2
DE 3
DI 4
D
8
7
6
5
V
CC
B/Z
A/Y
GND
ISL83071E, ISL83077E
(8 LD SOIC)
TOP VIEW
V
CC
1
RO 2
DI 3
GND 4
D
8
7
6
5
A
B
Z
Y
ISL83070E, ISL83073E, ISL83076E
(14 LD SOIC)
TOP VIEW
NC 1
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
D
R
14 V
CC
13 NC
12 A
11 B
10 Z
9 Y
8 NC
R
R
Ordering Information
PART NUMBER
PART
(Notes 1, 2, 3) MARKING
ISL83070EIBZA 83070EIBZ
TEMP.
RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
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*
-40 to 85 14 Ld SOIC M14.15
M8.15
M8.15
ISL83071EIBZA 83071 EIBZ -40 to 85 8 Ld SOIC
ISL83072EIBZA 83072 EIBZ -40 to 85 8 Ld SOIC
ISL83072EIUZA 3072Z
ISL83073EIBZA 83073EIBZ
-40 to 85 8 Ld MSOP M8.118
-40 to 85 14 Ld SOIC M14.15
M8.15
ISL83075EIBZA 83075 EIBZ -40 to 85 8 Ld SOIC
ISL83075EIUZA 3075Z
ISL83076EIBZA 83076EIBZ
-40 to 85 8 Ld MSOP M8.118
-40 to 85 14 Ld SOIC M14.15
M8.15
M8.15
NOTE: *Shutdown Mode (See Note 10), except for ISL83071E/77E
ISL83077EIBZA 83077 EIBZ -40 to 85 8 Ld SOIC
ISL83078EIBZA 83078 EIBZ -40 to 85 8 Ld SOIC
ISL83078EIUZA 3078Z
NOTES:
RECEIVING
INPUTS
RE
0
0
0
1
1
DE
DE
Half Duplex Full Duplex
0
0
0
0
1
X
X
X
0
1
A-B
≥
-0.05V
≤
-0.2V
Inputs
Open/Shorted
X
X
OUTPUT
RO
1
0
1
High-Z*
High-Z
-40 to 85 8 Ld MSOP M8.118
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
ISL83070E, ISL83071E, ISL83072E,
ISL83073E, ISL83075E, ISL83076E, ISL83077E, ISL83078E.
For more information on MSL please see tech brief
TB363.
NOTE: *Shutdown Mode (See Note 10), except for ISL83071E/77E
2
FN6115.5
October 5, 2012
ISL83070E, ISL83071E, ISL83072E, ISL83073E, ISL83075E, ISL83076E, ISL83077E, ISL83078E
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
≥
-50mV, RO is high; If A - B
≤
-200mV, RO is low; RO = High if A and B are unconnected (floating) or shorted.
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. If the Rx enable function isn’t
required, connect RE directly to GND or through a 1kΩ to 3kΩ resistor to GND.
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high, and are high impedance when DE is low. If the
Tx enable function isn’t required, connect DE to V
CC
through a 1kΩ to 3kΩ resistor.
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.
±15kV
HBM ESD Protected RS-485/RS-422 level, noninverting receiver input and noninverting driver output. Pin is an input if DE =
0; pin is an output if DE = 1.
±15kV
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.
±15kV
HBM ESD Protected RS-485/RS-422 level, noninverting receiver input.
±15kV
HBM ESD Protected RS-485/RS-422 level, inverting receiver input.
±15kV
HBM ESD Protected RS-485/RS-422 level, noninverting driver output.
±15kV
HBM ESD Protected RS-485/RS-422 level, inverting driver output.
System power supply input (3.0V to 3.6V).
No Connection.
3
FN6115.5
October 5, 2012
ISL83070E, ISL83071E, ISL83072E, ISL83073E, ISL83075E, ISL83076E, ISL83077E, ISL83078E
Typical Operating Circuits
+3.3V
+
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
+3.3V
ISL83072E, ISL83075E, ISL83078E
+3.3V
+
1
V
CC
2 RO
A 8
R
B 7
R
T
R
T
5
6
0.1µF
0.1µF
+
+3.3V
1
V
CC
Y
Z
D
DI 3
3 DI
Z 6
D
GND
4
Y 5
7 B
8 A
GND
4
R
RO 2
ISL83071E, ISL83077E
+3.3V
+
14
V
CC
2 RO
3 RE
4 DE
5 DI
Z 10
D
GND
6, 7
Y 9
R
T
R
A 12
B 11
0.1µF
R
T
0.1µF
+
+3.3V
14
9 Y
10 Z
V
CC
D
DI 5
DE 4
RE 3
11 B
12 A
GND
6, 7
R
RO 2
ISL83070E, ISL83073E, ISL83076E
4
FN6115.5
October 5, 2012
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