ISL3158AE
T
E P R OD U C
UCT
OB S O L E T
U T E P R OD
E SUBSTIT
POSSIBL
ISL3158E
DATASHEET
FN6886
Rev 1.00
October 15, 2013
±16.5kV ESD (IEC61000-4-2) Protected, Large Output Swing, 5V, Full Fail-Safe,
1/8 Unit Load, RS-485/RS-422 Transceiver
The ISL3158AE is a BiCMOS, IEC61000 ESD protected, 5V
powered, single transceiver that meets both the RS-485 and
RS-422 standards for balanced communication. Each driver
output and receiver input is protected against ±16.5kV ESD
strikes without latch-up.
The ISL3158AE transmitter delivers exceptional differential
output voltages (2.4V min), into the RS-485 required 54
load, for better noise immunity or to allow up to eight 120
terminations in “star” or other non-standard bus topologies.
This device has very low bus currents (+125
µ
A/-75
µ
A), so it
presents 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.
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic high Rx output if Rx inputs are floating,
shorted, or on a terminated but undriven bus. Rx outputs
feature high drive levels - typically 28mA @ V
OL
= 1V (to
ease the design of optocoupled isolated interfaces).
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 ISL3158AE is a half duplex version. It multiplexes the
Rx inputs and Tx outputs to allow transceivers with output
disable functions in an 8 Ld package.
Features
• High Driver V
OD
. . . . . . . . . . . . . . 2.4V (Min) @ R
D
= 54
- Better Noise Immunity, or Drive Up to 8 Terminations
• IEC61000 ESD Protection on RS-485 I/O Pins . . ±16.5kV
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
• Full Fail-safe (Open, Short, Terminated and Undriven)
Receivers
• High Rx I
OL
to Drive Opto-Couplers for Isolated
Applications
• Hot Plug Circuitry - 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 . . . . . . . . . . . . . . . . 600
µ
A
Ultra Low Shutdown Supply Current . . . . . . . . . . . . .70nA
• -7V to +12V Common Mode Input Voltage Range
• Half Duplex Pinouts
• Pb-free (RoHS compliant)
• Three-State Rx and Tx Outputs
• Current Limiting for Driver Overload Protection
Applications
• Utility Meters and Automated Meter Reading Systems
• High Node Count Systems
• PROFIBUS® and Field Bus Networks, and Factory
Automation
• Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
ISL3158AEM
ISL3158AEMW
HALF/FUL
L DUPLEX
Half
Half
DATA RATE
(Mbps)
10
10
SLEW-RATE
# DEVICES
LIMITED?
HOT PLUG ON BUS
No
No
Yes
Yes
256
256
Rx/Tx
ENABLE?
Yes
Yes
QUIESCENT
I
CC
(µA)
600
600
LOW POWER
PIN
SHUTDOWN? COUNT
Yes
Yes
8
N/A
FN6886 Rev 1.00
October 15, 2013
Page 1 of 16
ISL3158AE
Pinout
ISL3158AE
(8 LD SOIC)
TOP VIEW
RO 1
RE 2
DE 3
DI 4
D
8
7
6
5
V
CC
B/Z
A/Y
GND
R
Ordering Information
PART NUMBER
(Notes 2, 3)
ISL3158AEMBZ (Note 1)
ISL3158AEMW
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
ISL3158AE.
For more information on MSL, please see tech brief
TB363.
PART
MARKING
3158A EMBZ
TEMP. RANGE
(°C)
-55 to +125
-55 to +125
PACKAGE
(Pb-Free)
8 Ld SOIC
Wafer
PKG.
DWG. #
M8.15
FN6886 Rev 1.00
October 15, 2013
Page 2 of 16
ISL3158AE
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
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
NOTE: *Shutdown Mode (See Note 10).
NOTE: *Shutdown Mode (See Note 10).
Pin Descriptions
PIN
RO
RE
DE
DI
GND
A/Y
B/Z
V
CC
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.
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.
±16.5kV IEC61000 ESD Protected RS-485/RS-422 level, non-inverting receiver input and noninverting driver output. Pin is an input
if DE = 0; pin is an output if DE = 1.
±16.5kV IEC61000 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.
System power supply input (4.5V to 5.5V).
FN6886 Rev 1.00
October 15, 2013
Page 3 of 16
ISL3158AE
Typical Operating Circuit
ISL3158AE
+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
FN6886 Rev 1.00
October 15, 2013
Page 4 of 16
ISL3158AE
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -9V to +13V
A/Y, B/Z (Transient Pulse Through 100) . . . . . . . . . . . . . . ±25V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
CC
+0.3V)
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . See Specifications Table
Thermal Information
Thermal Resistance (Typical, Note 4)
JA
(°C/W)
8 Ld SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
120
Maximum Junction Temperature (Plastic Package) . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C
Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . .-55°C to +125°C
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.
NOTE:
4.
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 5). Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified.
Temperature limits established by characterization and are not production tested.
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
TYP
MAX
UNITS
PARAMETER
DC CHARACTERISTICS
Driver Differential V
OUT
(No load)
Driver Differential V
OUT
(Loaded)
V
OD1
V
OD2
R
L
= 100 (RS-422) (Figure 1A)
R
L
= 54 (RS-485) (Figure 1A)
R
L
= 15 (Eight 120 terminations) (Note 13)
R
L
= 60, -7V
V
CM
12V (Figure 1B)
Full
Full
Full
25
Full
Full
-
2.8
2.4
-
2.4
-
-
3.6
3.1
1.65
3
0.01
V
CC
-
V
CC
-
-
0.2
V
V
V
V
V
V
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
DI Input Hysteresis Voltage
Logic Input Current
Input Current (A/Y, B/Z)
V
OD
R
L
= 54 or 100 (Figure 1A)
V
OC
V
OC
R
L
= 54 or 100 (Figure 1A)
R
L
= 54 or 100 (Figure 1A)
Full
Full
-
-
-
0.01
3.15
0.2
V
V
V
IH
V
IL
V
HYS
I
IN1
I
IN2
DE, DI, RE
DE, DI, RE
Full
Full
25
2
-
-
-2
-
-75
-
-200
-
V
CC
- 1.2
-
15
-
-
100
-
70
55
-
-90
20
4.3
0.25
28
-
0.8
-
2
125
-
±250
-50
-
-
0.5
-
V
V
mV
µA
µA
µA
mA
mV
mV
V
V
mA
DE, DI, RE
DE = 0V, V
CC
= 0V or 5.5V V
IN
= 12V
V
IN
= -7V
Full
Full
Full
Full
Full
25
Full
Full
Full
Driver Short-Circuit Current,
V
O
= High or Low
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Receiver Output Low Current
I
OSD1
V
TH
V
TH
V
OH
V
OL
I
OL
DE = V
CC
, -7V
V
Y
or V
Z
12V (Note 7)
-7V
V
CM
12V (Note 15)
V
CM
= 0V
I
O
= -8mA, V
ID
= -50mV
I
O
= -8mA, V
ID
= -200mV
V
O
= 1V, V
ID
= -200mV
FN6886 Rev 1.00
October 15, 2013
Page 5 of 16
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