1
®
FN6085.6
ISL83080E, ISL83082E, ISL83083E,
ISL83085E, ISL83086E, ISL83088E
±15kV ESD Protected, 5V, Full Fail-Safe,
Fractional (1/8) Unit Load, RS-485/RS-422
Transceivers
The ISL8308XE are BiCMOS, ESD protected, 5V powered,
single transceivers that meet both the RS-485 and RS-422
standards for balanced communication. Each driver output,
and receiver input, is protected against
±
15kV ESD strikes
without latch-up, and unlike competitive products, this Intersil
family is specified for 10% tolerance supplies (4.5V to 5.5V).
These devices have very low bus currents (+125
µA/-75µA),
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. Data for all
meters is then read out from the concentrator via a single
access port, or a wireless link.
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.
The ISL83080E, ISL83082E, ISL83083E, ISL83085E 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.
Hot Plug circuitry ensures that the Tx and Rx outputs remain
in a high impedance state until the power supply has
stabilized, and the Tx outputs are fully short circuit protected.
The ISL83080E, ISL83083E, ISL83086E 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 Plus Anneal Available (RoHS Compliant)
(See Ordering Info)
· RS-485 I/O Pin ESD Protection . . . . . . . . . .
±
15kV HBM
Class 3 ESD Protection (HBM) on all Pins. . . . . . . . >7kV
· Full Fail-safe (Open, Short, Terminated and Floating)
Receivers
· Hot Plug Circuitry (ISL83080E, ISL83082E, ISL83083E,
ISL83085E)
- Tx and Rx Outputs Remain Three-state During Power-
up/Power-down
· True 1/8 Unit Load Allows up to 256 Devices on the Bus
· Specified for Single 5V, 10% Tolerance, Supplies
· High Data Rates . . . . . . . . . . . . . . . . . . . . . up to 10Mbps
· Low Quiescent Supply Current . . . . . . . . . . . . . . . 530
µ
A
Ultra Low Shutdown Supply Current . . . . . . . . . . . . 70nA
· -7V to +12V Common Mode Input Voltage Range
· Half and Full Duplex Pinouts
· Three-State Rx and Tx Outputs
· Current Limiting and Thermal Shutdown for driver
Overload Protection
Applications
· Automated Utility Meter Reading Systems
· High Node Count Systems
· Factory Automation
· Field Bus Networks
· Security Camera Networks
· Building Environmental Control Systems
· Industrial/Process Control Networks
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED?
HOT PLUG
# DEVICES
ON BUS
Rx/Tx
ENABLE?
QUIESCENT
I
CC
(
µ
A)
LOW POWER
SHUTDOWN?
PIN
COUNT
ISL83080E
Full
0.115
Yes
Yes
256
Yes
530
Yes
14
ISL83082E
Half
0.115
Yes
Yes
256
Yes
530
Yes
8
ISL83083E
Full
0.5
Yes
Yes
256
Yes
530
Yes
14
ISL83085E
Half
0.5
Yes
Yes
256
Yes
530
Yes
8
ISL83086E
Full
10
No
No
256
Yes
530
Yes
14
ISL83088E
Half
10
No
No
256
Yes
530
Yes
8
Data Sheet
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2004-2005. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
September 12, 2005
2
FN6085.6
September 12, 2005
Pinouts
ISL83082E, ISL83085E, ISL83088E
(MSOP, SOIC)
TOP VIEW
ISL83080E, ISL83083E, ISL83086E
(SOIC)
TOP VIEW
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
CC
B/Z
A/Y
GND
D
R
NC
RO
RE
DE
DI
GND
GND
V
CC
NC
A
B
Z
Y
NC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
D
R
Ordering Information
(Note 1)
PART NO. (BRAND)
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL83080EIB
(83080EIB)
-40 to 85
14 Ld SOIC
M14.15
ISL83080EIBZ
(83080EIBZ, Note 2)
-40 to 85
14 Ld SOIC
(Pb-Free)
M14.15
ISL83082EIB
(83082EIB)
-40 to 85
8 Ld SOIC
M8.15
ISL83082EIBZ
(83082EIBZ, Note 2)
-40 to 85
8 Ld SOIC
(Pb-Free)
M8.15
ISL83082EIU (3082E)
-40 to 85
8 Ld MSOP
M8.118
ISL83082EIUZ
(3082Z, Note 2)
-40 to 85
8 Ld MSOP
(Pb-free)
M8.118
ISL83083EIB
(83083EIB)
-40 to 85
14 Ld SOIC
M14.15
ISL83083EIBZ
(83083EIBZ, Note 2)
-40 to 85
14 Ld SOIC
(Pb-Free)
M14.15
ISL83085EIB
(83085EIB)
-40 to 85
8 Ld SOIC
M8.15
ISL83085EIBZ
(83085EIBZ, Note 2)
-40 to 85
8 Ld SOIC
(Pb-Free)
M8.15
ISL83085EIU (3085E)
-40 to 85
8 Ld MSOP
M8.118
ISL83085EIUZ
(3085Z, Note 2)
-40 to 85
8 Ld MSOP
(Pb-free)
M8.118
ISL83086EIB
(83086EIB)
-40 to 85
14 Ld SOIC
M14.15
ISL83086EIBZ
(83086EIBZ, Note 2)
-40 to 85
14 Ld SOIC
(Pb-Free)
M14.15
ISL83088EIB
(83088EIB)
-40 to 85
8 Ld SOIC
M8.15
ISL83088EIBZ
(83088EIBZ, Note 2)
-40 to 85
8 Ld SOIC
(Pb-Free)
M8.15
ISL83088EIU (3088E)
-40 to 85
8 Ld MSOP
M8.118
ISL83088EIUZ
(3088Z, Note 2)
-40 to 85
8 Ld MSOP
(Pb-free)
M8.118
NOTES:
1. Units also available in Tape and Reel; Add "-T" to suffix.
2. Intersil Pb-free products employ special Pb-free material sets; molding
compounds/die attach materials and 100% matte tin plate termination
finish, which are 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.
Ordering Information
(Note 1)
(Continued)
PART NO. (BRAND)
TEMP.
RANGE (°C)
PACKAGE
PKG.
DWG. #
ISL83080E, ISL83082E, ISL83083E, ISL83085E, ISL83086E, ISL83088E
3
FN6085.6
September 12, 2005
Truth Tables
TRANSMITTING
INPUTS
OUTPUTS
RE
DE
DI
Z
Y
X
1
1
0
1
X
1
0
1
0
0
0
X
High-Z
High-Z
1
0
X
High-Z *
High-Z *
NOTE: *Shutdown Mode (See Note 9).
RECEIVING
INPUTS
OUTPUT
RE
DE
Half Duplex
DE
Full Duplex
A-B
RO
0
0
X
-0.05V
1
0
0
X
-0.2V
0
0
0
X
Inputs
Open/Shorted
1
1
0
0
X
High-Z *
1
1
1
X
High-Z
NOTE: *Shutdown Mode (See Note 9).
Pin Descriptions
PIN
FUNCTION
RO
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.
RE
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high.
DE
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low.
DI
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.
GND
Ground connection.
A/Y
±
15kV HBM ESD Protected RS-485/422 level, noninverting receiver input and noninverting driver output. Pin is an input if DE = 0;
pin is an output if DE = 1.
B/Z
±
15kV HBM ESD Protected RS-485/422 level, Inverting receiver input and inverting driver output. Pin is an input if DE = 0; pin is an
output if DE = 1.
A
±
15kV HBM ESD Protected RS-485/422 level, noninverting receiver input.
B
±
15kV HBM ESD Protected RS-485/422 level, inverting receiver input.
Y
±
15kV HBM ESD Protected RS-485/422 level, noninverting driver output.
Z
±
15kV HBM ESD Protected RS-485/422 level, inverting driver output.
V
CC
System power supply input (4.5V to 5.5V).
NC
No Connection.
ISL83080E, ISL83082E, ISL83083E, ISL83085E, ISL83086E, ISL83088E
4
FN6085.6
September 12, 2005
Typical Operating Circuit
ISL83082E, ISL83085E, ISL83088E
ISL83080E, ISL83083E, ISL83086E
0.1
µ
F
+
D
R
7
6
8
1
2
3
4
5
V
CC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
0.1
µ
F
+
D
R
6
7
8
1
2
3
4
5
V
CC
GND
RO
RE
DE
DI
A/Y
B/Z
+5V
R
T
R
T
0.1
µ
F
+
D
R
12
11
10
9
14
2
3
4
5
6, 7
V
CC
GND
RO
RE
DE
DI
A
B
Y
Z
+5V
0.1
µ
F
+
D
R
12
11
10
9
14
2
3
4
5
6, 7
V
CC
GND
RO
RE
DE
DI
A
B
Y
Z
+5V
R
T
R
T
ISL83080E, ISL83082E, ISL83083E, ISL83085E, ISL83086E, ISL83088E
5
FN6085.6
September 12, 2005
Absolute Maximum Ratings
Thermal Information
V
CC
to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
CC
+ 0.3V)
Input/Output Voltages
A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -9V to +13V
A, B, Y, Z (Transient Pulse Through 100
) . . . . . . . . . . . . .
±
25V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
CC
+0.3V)
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Thermal Resistance (Typical, Note 3)
JA
(°C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . .
105
8 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . .
140
14 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . .
128
Maximum Junction Temperature (Plastic Package) . . . . . . . 150°C
Maximum Storage Temperature Range . . . . . . . . . . . -65°C to 150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . 300°C
(Lead Tips Only)
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . -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:
3.
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: V
CC
= 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at V
CC
= 5V, T
A
= 25°C
(Note 4)
PARAMETER
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
DC CHARACTERISTICS
Driver Differential V
OUT
(no load)
V
OD1
Full
-
-
V
CC
V
Driver Differential V
OUT
(with load)
V
OD2
R
L
= 100
(RS-422) (Figure 1A)
Full
2
2.9
-
V
R
L
= 54
(RS-485) (Figure 1A)
Full
1.5
2.4
V
CC
V
R
L
= 60
, -7V
V
CM
12V (Figure 1B)
Full
1.5
2.6
-
V
Change in Magnitude of Driver
Differential V
OUT
for
Complementary Output States
V
OD
R
L
= 54
or 100
(Figure 1A)
Full
-
0.01
0.2
V
Driver Common-Mode V
OUT
V
OC
R
L
= 54
or 100
(Figure 1A)
Full
-
2.85
3
V
Change in Magnitude of Driver
Common-Mode V
OUT
for
Complementary Output States
V
OC
R
L
= 54
or 100
(Figure 1A)
Full
-
0.01
0.1
V
Logic Input High Voltage
V
IH
DE, DI, RE
Full
2
-
-
V
Logic Input Low Voltage
V
IL
DE, DI, RE
Full
-
-
0.8
V
DI Input Hysteresis Voltage
V
HYS
25
-
100
-
mV
Logic Input Current
I
IN1
DE, DI, RE
Full
-2
-
2
µ
A
Input Current (A, B)
I
IN2
DE = 0V, V
CC
= 0V or 5.5V
V
IN
= 12V
Full
-
70
125
µ
A
V
IN
= -7V
Full
-75
55
-
µ
A
Output Leakage Current (Y, Z)
(Full Duplex Versions Only)
I
IN3
RE = 0V, DE = 0V, V
CC
= 0V
or 5.5V
V
IN
= 12V
Full
-
7
125
µ
A
V
IN
= -7V
Full
-75
11
-
µ
A
Output Leakage Current (Y, Z)
in Shutdown Mode (Full Duplex)
I
IN3
RE = V
CC
, DE = 0V, V
CC
= 0V
or 5.5V
V
IN
= 12V
Full
-
0
20
µ
A
V
IN
= -7V
Full
-20
9
-
µ
A
Driver Short-Circuit Current,
V
O
= High or Low
I
OSD1
DE = V
CC
, -7V
V
Y
or V
Z
12V (Note 6)
Full
-
-
±
250
mA
Receiver Differential Threshold
Voltage
V
TH
-7V
V
CM
12V
Full
-200
-90
-50
mV
Receiver Input Hysteresis
V
TH
V
CM
= 0V
25
-
20
-
mV
ISL83080E, ISL83082E, ISL83083E, ISL83085E, ISL83086E, ISL83088E
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