DATASHEET
ISL8483E, ISL8485E
ESD Protected to ±15kV, 5V, Low Power, High Speed or Slew Rate Limited
RS-485/RS-422 Transceivers
The
ISL8483E
and
ISL8485E
are ESD protected, BiCMOS 5V
powered, single transceivers that meet both the RS-485 and
RS-422 standards for balanced communication. Each driver
output/receiver input is protected against ±15kV ESD strikes,
without latch-up. Unlike competitive devices, this Intersil
family is specified for 10% tolerance supplies (4.5V to 5.5V).
The
ISL8483E
uses 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
ISL8485E,
which features higher slew rates.
Both devices present a “single unit load” to the RS-485 bus,
which allows up to 32 transceivers on the network.
Receiver (Rx) inputs feature a “fail-safe if open” design, which
ensures a logic high Rx output if Rx inputs are floating.
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.
These half duplex configurations multiplex the Rx inputs and
Tx outputs to allow transceivers with Rx and Tx disable
functions in 8 Ld packages.
FN6048
Rev.12.00
Aug 31, 2017
Features
• Pb-Free (RoHS compliant)
• Extended industrial temperature options (+125°C)
• RS-485 I/O pin ESD protection . . . . . . . . . . . . . . ±15kV HBM
- Class 3 ESD level on all other pins. . . . . . . . . . . >7kV HBM
• Specified for 10% tolerance supplies
• High data rate version (ISL8485E). . . . . . . . . . up to 10Mbps
• Slew rate limited version for error free data transmission
(ISL8483E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to 250kbps
• Single unit load allows up to 32 devices on the bus
• 1nA low current Shutdown mode (ISL8483E)
• Low quiescent current:
- 160µA (ISL8483E)
- 500µA (ISL8485E)
• -7V to +12V common-mode input voltage range
• Three-state Rx and Tx outputs
• 30ns propagation delays, 5ns skew (ISL8485E)
• Operate from a single +5V supply (10% tolerance)
• Current limiting and thermal shutdown for driver overload
protection
Related Literature
• For a full list of related documents, visit our website
-
ISL8483E
and
ISL8485E
product pages
Applications
• Factory automation
• Security networks
• Building environmental control systems
• Industrial/process control networks
• Level translators (such as RS-232 to RS-422)
• RS-232 “extension cords”
TABLE 1. SUMMARY OF FEATURES
NO. OF
DEVICES
ALLOWED
ON BUS
32
32
PART
NUMBER
ISL8483E
ISL8485E
HALF/FULL
DUPLEX
Half
Half
DATA RATE
(Mbps)
0.25
10
SLEW-RATE
LIMITED?
Yes
No
RECEIVER/DRIVER
ENABLE?
Yes
Yes
QUIESCENT I
CC
(µA)
160
500
LOW POWER
SHUTDOWN?
Yes
No
PIN
COUNT
8
8
FN6048 Rev.12.00
Aug 31, 2017
Page 1 of 15
ISL8483E, ISL8485E
Ordering Information
PART NUMBER
(Notes
4, 5)
ISL8483EIBZ (Note
3)
ISL8483EIPZ (No longer available,
recommended replacement:
ISL8487EIPZ)
ISL8485EABZ (Note
2)
ISL8485ECBZ (Note
2)
ISL8485EIBZ (Note
2)
ISL8485EIPZ
NOTES:
1. Pb-free PDIPs can be used for through hole wave solder processing only. They are not intended for use in reflow solder processing applications.
2. Add “-T” suffix for 2.5k unit tape and reel option. Refer to
TB347
for details on reel specifications.
3. Add “-T” suffix for 2.5k unit or “-T7A” suffix for 250 unit tape and reel options. Refer to
TB347
for details on reel specifications
4. 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.
5. For Moisture Sensitivity Level (MSL), refer to the product information pages for the
ISL8483E
and the
ISL8485E.
For more information on MSL, refer
to
TB363.
PART MARKING
8483EIBZ
ISL8483EIPZ
TEMP. RANGE (°C)
-40 to +85
-40 to +85
PACKAGE
(RoHS COMPLIANT)
8 Ld SOIC
8 Ld PDIP (Note
1)
PKG. DWG. #
M8.15
E8.3
8485EABZ
8485ECBZ
8485EIBZ
ISL8485EIPZ
-40 to +125
0 to +70
-40 to +85
-40 to +85
8 Ld SOIC
8 Ld SOIC
8 Ld SOIC
8 Ld PDIP (Note
1)
M8.15
M8.15
M8.15
E8.3
Pin Configuration
ISL8483E, ISL8485E
(8 LD PDIP, SOIC)
TOP VIEWt
RO
RE
DE
DI
1
2
3
4
D
8
7
6
5
V
CC
B/Z
A/Y
GND
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 *
RE
0
0
0
0
1
1
DE
0
0
0
0
0
1
RECEIVING
INPUTS
A-B
V
AB
≥
0.2V
OUTPUT
RO
1
0.2V > V
AB
> -0.2V Undetermined
V
AB
≤
-0.2V
Inputs Open
X
X
0
1
High-Z*
High-Z
*Shutdown mode for ISL8483E (see
Note 12)
*Shutdown mode for ISL8483E (see
Note 12)
FN6048 Rev.12.00
Aug 31, 2017
Page 2 of 15
ISL8483E, ISL8485E
Pin Descriptions
PIN
RO
RE
DE
DI
GND
A/Y
B/Z
V
CC
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. If A and B are unconnected (floating), RO is high.
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.
±15kV HBM ESD protected, RS-485, RS-422 level noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0;
pin is an output (Y) if DE = 1.
±15kV HBM ESD protected, RS-485, RS-422 level inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is
an output (Z) if DE = 1.
System power supply input (4.5V to 5.5V).
Typical Operating Circuits
ISL8483E, ISL8485E
+5V
+
8
V
CC
1
2
3
4
RO
RE
DE
DI
R
B/Z
A/Y
7
6
R
T
R
T
7
6
B/Z
A/Y
+
8
V
CC
D
DI
DE
RE
RO
4
3
2
1
+5V
0.1µF
0.1µF
D
GND
5
GND
5
R
FN6048 Rev.12.00
Aug 31, 2017
Page 3 of 15
ISL8483E, ISL8485E
Absolute Maximum Ratings
V
CC
to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (V
CC
+0.5V)
Input/Output Voltages
A/Y, B/Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V
RO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (V
CC
+0.5V)
Short-Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . .See
“Electrical Specifications”
Thermal Information
Thermal Resistance (Typical,
Note 6)
JA
(°C/W)
8 Ld SOIC Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
170
8 Ld PDIP Package* . . . . . . . . . . . . . . . . . . . . . . . . . . . .
140
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see
TB493
*Pb-free PDIPs can be used for through hole wave solder processing only.
They are not intended for use in reflow solder processing applications.
Operating Conditions
Temperature Range
ISL8485ECx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to +70°C
ISL848xEIx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
ISL8485EAx. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°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:
6.
JA
is measured with the component mounted on a low-effective thermal conductivity test board in free air. Refer to
TB379
for details.
Electrical Specifications
Test Conditions: V
CC
= 4.5V to 5.5V; unless otherwise specified. Typical values are at V
CC
= 5V,
T
A
= +25°C, (Note
7)
PARAMETER
DC CHARACTERISTICS
Driver Differential V
OUT
(No Load)
Driver Differential V
OUT
(With Load)
V
OD1
V
OD2
R = 50Ω (RS-422), (Figure
1 on page 6)
R = 27Ω (RS-485), (Figure
1 on page 6)
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 = 27Ω or 50Ω, (Figure
1 on page 6)
Full
Full
Full
Full
-
2
1.5
-
-
3
2.3
0.01
V
CC
-
5
0.2
V
V
V
V
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
(Note
17)
TYP
MAX
(Note
17)
UNIT
V
OC
V
OC
R = 27Ω or 50Ω, (Figure
1 on page 6)
R = 27Ω or 50Ω, (Figure
1 on page 6)
Full
Full
-
-
-
0.01
3
0.2
V
V
V
IH
V
IL
I
IN1
I
IN1
I
IN1
DE, DI, RE
DE, DI, RE
DE, DI, RE (ISL8483E)
DI (ISL8485E)
DE, RE (ISL8485E)
DE = 0V, V
CC
= 0V or 4.5 to 5.5V
V
IN
= 12V
V
IN
= -7V
Full
Full
Full
Full
Full
Full
Full
Full
25
Full
Full
Full
2
-
-2
-2
-25
-
-
-0.2
-
3.5
-
-
-
-
-
-
-
-
-
-
70
-
-
-
-
0.8
2
2
25
1
-0.8
0.2
-
-
0.4
±1
V
V
µA
µA
µA
mA
mA
V
mV
V
V
µA
Input Current (A, B), (Note
15)
I
IN2
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
Receiver Output Low Voltage
Three-State (High Impedance)
Receiver Output Current
V
TH
V
TH
V
OH
V
OL
I
OZR
-7V
V
CM
12V
V
CM
= 0V
I
O
= -4mA, V
ID
= 200mV
I
O
= -4mA, V
ID
= 200mV
0.4V
V
O
2.4V
FN6048 Rev.12.00
Aug 31, 2017
Page 4 of 15
ISL8483E, ISL8485E
Electrical Specifications
Test Conditions: V
CC
= 4.5V to 5.5V; unless otherwise specified. Typical values are at V
CC
= 5V,
T
A
= +25°C, (Note
7)
(Continued)
PARAMETER
Receiver Input Resistance
No-Load Supply Current, (Note
8)
SYMBOL
R
IN
I
CC
TEST CONDITIONS
-7V
V
CM
12V
ISL8485E, DI, RE = 0V or V
CC
DE = V
CC
DE = 0V
ISL8483E, DI, RE = 0V or V
CC
DE = V
CC
DE = 0V
Shutdown Supply Current
Driver Short-Circuit Current,
V
O
= High or Low
Receiver Short-Circuit Current
I
SHDN
I
OSD1
I
OSR
ISL8483E, DE = 0V, RE = V
CC
, DI = 0V or V
CC
DE = V
CC
, -7V
V
Y
or V
Z
12V, (Note
9)
0V
V
O
V
CC
TEMP
(°C)
Full
Full
Full
Full
Full
Full
Full
Full
MIN
(Note
17)
12
-
-
-
-
-
35
7
TYP
-
700
500
470
160
1
-
-
MAX
(Note
17)
-
900
565
650
250
50
250
85
UNIT
kΩ
µA
µA
µA
µA
nA
mA
mA
SWITCHING CHARACTERISTICS (ISL8485E)
Driver Input to Output Delay
Driver Output Skew
Driver Differential Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output High
Driver Disable from Output Low
Receiver Input to Output Delay
Receiver Skew | t
PLH
- t
PHL
|
Receiver Enable to Output High
Receiver Enable to Output Low
Receiver Disable from Output High
Receiver Disable from Output Low
Maximum Data Rate
t
PLH
, t
PHL
R
DIFF
= 54Ω, C
L
= 100pF, (Figure
2 on page 7)
t
SKEW
t
R
, t
F
t
ZH
t
ZL
t
HZ
t
LZ
R
DIFF
= 54Ω, C
L
= 100pF, (Figure
2 on page 7)
R
DIFF
= 54Ω, C
L
= 100pF, (Figure
2 on page 7)
C
L
= 100pF, SW = GND, (Figure
3 on page 7)
C
L
= 100pF, SW = V
CC
, (Figure
3 on page 7)
C
L
= 15pF, SW = GND, (Figure
3 on page 7)
C
L
= 15pF, SW = V
CC
, (Figure
3 on page 7)
Full
Full
Full
Full
Full
Full
Full
Full
25
Full
Full
Full
Full
Full
18
-
3
-
-
-
-
30
-
-
-
-
-
10
30
2
11
17
14
19
13
40
5
9
9
9
9
-
50
10
25
70
70
70
70
150
-
50
50
50
50
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Mbps
t
PLH
, t
PHL
(Figure
4 on page 7)
t
SKD
t
ZH
t
ZL
t
HZ
t
LZ
f
MAX
(Figure
4 on page 7)
C
L
= 15pF, SW = GND, (Figure
5 on page 8)
C
L
= 15pF, SW = V
CC
, (Figure
5 on page 8)
C
L
= 15pF, SW = GND, (Figure
5 on page 8)
C
L
= 15pF, SW = V
CC
, (Figure
5 on page 8)
(Note
16)
SWITCHING CHARACTERISTICS (ISL8483E)
Driver Input to Output Delay
Driver Output Skew
Driver Differential Rise or Fall Time
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output High
Driver Disable from Output Low
Receiver Input to Output Delay
Receiver Skew | t
PLH
- t
PHL
|
Receiver Enable to Output High
Receiver Enable to Output Low
t
PLH
, t
PHL
R
DIFF
= 54Ω, C
L
= 100pF, (Figure
2 on page 7)
t
SKEW
t
R
, t
F
t
ZH
t
ZL
t
HZ
t
LZ
R
DIFF
= 54Ω, C
L
= 100pF, (Figure
2 on page 7)
R
DIFF
= 54Ω, C
L
= 100pF, (Figure
2 on page 7)
C
L
= 100pF, SW = GND, (Figure
3 on page 7),
(Note
10)
C
L
= 100pF, SW = V
CC
, (Figure
3 on page 7),
(Note
10)
C
L
= 15pF, SW = GND, (Figure
3 on page 7)
C
L
= 15pF, SW = V
CC
, (Figure
3 on page 7)
Full
Full
Full
Full
Full
Full
Full
Full
25
Full
Full
250
-
250
250
250
300
300
250
-
-
-
800
160
800
-
-
-
-
350
25
10
10
2000
800
2000
2000
2000
3000
3000
2000
-
50
50
ns
ns
ns
ns
ns
ns
t
PLH
, t
PHL
(Figure
4 on page 7)
t
SKD
t
ZH
t
ZL
(Figure
4 on page 7)
C
L
= 15pF, SW = GND, (Figure
5 on page 8),
(Note
11)
C
L
= 15pF, SW = V
CC
, (Figure
5 on page 8),
(Note
11)
FN6048 Rev.12.00
Aug 31, 2017
Page 5 of 15
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