ISL31483E, ISL31485E
DATASHEET
NOT RECOMMENDED FOR NEW DESIGNS
RECOMMENDED REPLACEMENT PART
ISL32483E, ISL32485E
Fault Protected, Extended CMR, RS-485/RS-422 Transceivers with Cable Invert
The ISL31483E and ISL31485E are fault protected, 5V powered
differential transceivers that exceed the RS-485 and RS-422
standards for balanced communication. The RS-485 transceiver
pins (driver outputs and receiver inputs) are fault protected up to
±60V. Additionally, the extended common mode range allows
these transceivers to operate in environments with common
mode voltages up to ±25V (>2x the RS-485 requirement),
making this fault protected RS-485 family one of the most
robust on the market.
Transmitters deliver an exceptional 2.5V (typical) differential
output voltage into the RS-485 specified 54Ω load. This yields
better noise immunity than standard RS-485 ICs, or allows up
to six 120Ω terminations in star network topologies.
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 (idle) bus.
The ISL31483E and ISL31485E include cable invert functions
that reverse the polarity of the Rx and/or Tx bus pins in case
the cable is misconnected. Unlike competing devices, Rx full
fail-safe operation is maintained even when the Rx input polarity
is switched.
FN7638
Rev 4.00
May 13, 2015
Features
• Fault protected RS-485 bus pins . . . . . . . . . . . . . . up to ±60V
• Extended common mode range. . . . . . . . . . . . . . . . . . . . ±25V
More than twice the range required for RS-485
• Cable invert pins
corrects for reversed cable connections while maintaining
Rx full fail-safe functionality
• Full fail-safe (open, short, terminated) RS-485 receivers
• 1/4 unit load (UL) for up to 128 devices on the bus
• High Rx IOL for opto-couplers in isolated designs
• Hot plug circuitry - Tx and Rx outputs remain three-state
during power-up/power-down
• Slew rate limited RS-485 data rate . . . . . . . . . . . . . . . 1Mbps
• Low quiescent supply current. . . . . . . . . . . . . . . . . . . . 2.3mA
• Ultra low shutdown supply current. . . . . . . . . . . . . . . . . . 10µA
Applications
• Utility meters/automated meter reading systems
• High node count RS-485 systems
• PROFIBUS™ and RS-485 based field bus networks and
factory automation
• Security camera networks
• Building lighting and environmental control systems
• Industrial/process control networks
30
COMMON MODE RANGE
A
20
VOLTAGE (V)
25
VID = ±1V
B
25
15
10
5
RO
0
12
0
-7
-12
-20
-25
-5
TIME (400ns/DIV)
FIGURE 1. EXCEPTIONAL Rx OPERATES AT 1Mbps EVEN WITH
±25V COMMON MODE VOLTAGE
FN7638 Rev 4.00
May 13, 2015
STANDARD RS-485
TRANSCEIVER
CLOSEST
COMPETITOR
ISL3148XE
FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON MODE
RANGE vs STANDARD RS-485 DEVICES
Page 1 of 18
ISL31483E, ISL31485E
Table of Contents
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin Configurations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Truth Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Operating Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Test Circuits and Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver (Rx) Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driver (Tx) Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Overvoltage (Fault) Protection Increases Ruggedness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Widest Common Mode Voltage (CMV) Tolerance Improves Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Invert (Polarity Reversal) Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High VOD Improves Noise Immunity and Flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hot Plug Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Data Rate, Cables and Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Built-in Driver Overload Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Power Shutdown Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
11
11
11
11
11
12
12
12
12
13
Typical Performance Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Die Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Revision History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
About Intersil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Package Outline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
M14.15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
M8.15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
FN7638 Rev 4.00
May 13, 2015
Page 2 of 18
ISL31483E, ISL31485E
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED?
ISL31483E
Full
1
Yes
Yes
ISL31485E
Half
1
Yes
Tx Only
POLARITY
REVERSAL
PINS?
QUIESCENT ICC
(mA)
LOW
POWER
SHDN?
PIN COUNT
Yes
Yes
2.3
Yes
14
Yes
Yes
2.3
No
8
EN PINS? HOT PLUG
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
ISL31483EIBZ
ISL31483 EIBZ
-40 to +85
14 Ld SOIC
M14.15
ISL31485EIBZ
31485 EIBZ
-40 to +85
8 Ld SOIC
M8.15
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 Pbfree 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 product information page for ISL31483E, ISL31485E. For more information on MSL, please see tech
brief TB363
FN7638 Rev 4.00
May 13, 2015
Page 3 of 18
ISL31483E, ISL31485E
Pin Configurations
ISL31485E
(8 LD SOIC)
TOP VIEW
ISL31483E
(14 LD SOIC)
TOP VIEW
RINV 1
RO 2
R
RE 3
DE 4
DI 5
D
14 VCC
RO 1
13 VCC
INV 2
12 A
DE 3
11 B
DI 4
R
D
8
VCC
7
B/Z
6
A/Y
5
GND
10 Z
GND 6
9 Y
GND 7
8 DINV
Pin Descriptions
PIN
NAME
PIN #
PIN #
ISL31483E ISL31485E
DESCRIPTION
RO
2
1
Receiver output. If INV or RINV is low, then: If A - B -10mV, RO is high; if A - B -200mV, RO is low. If INV or RINV is high,
then: If B - A -10mV, RO is high; if B - A -200mV, RO is low. In all cases, RO = High if A and B are unconnected (floating),
or shorted together, or connected to an undriven, terminated bus (i.e., Rx is always failsafe open, shorted and idle, even
if polarity is inverted).
RE
3
-
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. Internally pulled low.
DE
4
3
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high and they are high impedance
when DE is low. Internally pulled high to VCC.
DI
5
4
Driver input. If INV or DINV is low, a low on DI forces output Y low and output Z high, while a high on DI forces output
Y high and output Z low. The output states relative to DI invert if INV or DINV is high.
GND
6, 7
5
Ground connection.
A/Y
-
6
±60V Fault Protected RS-485/RS-422 level I/O pin. If INV is low, A/Y is the non-inverting receiver input and
non-inverting driver output. If INV is high, A/Y is the inverting receiver input and the inverting driver output. Pin is an
input if DE = 0; pin is an output if DE = 1.
B/Z
-
7
±60V Fault Protected RS-485/RS-422 level I/O pin. If INV is low, B/Z is the inverting receiver input and inverting
driver output. If INV is high, B/Z is the non-inverting receiver input and the non-inverting driver output. Pin is an input
if DE = 0; pin is an output if DE = 1.
A
12
-
±60V Fault Protected RS-485/RS-422 level input. If RINV is low, then A is the non-inverting receiver input. If RINV is
high, then A is the inverting receiver input.
B
11
-
±60V Fault Protected RS-485/RS-422 level input. If RINV is low, then B is the inverting receiver input. If RINV is high,
then B is the non-inverting receiver input.
Y
9
-
±60V Fault Protected RS-485/RS-422 level output. If DINV is low, then Y is the non-inverting driver output. If DINV
is high, then Y is the inverting driver output.
Z
10
-
±60V Fault Protected RS-485/RS-422 level. If DINV is low, then Z is the inverting driver output. If DINV is high, then
Z is the non-inverting driver output.
VCC
13, 14
8
System power supply input (4.5V to 5.5V).
INV
-
2
Receiver and driver polarity selection input. When driven high this pin swaps the polarity of the driver output and receiver
input pins. If unconnected (floating) or connected low, normal RS-485 polarity conventions apply. Internally pulled low.
RINV
1
-
Receiver polarity selection input. When driven high this pin swaps the polarity of the receiver input pins. If unconnected
(floating) or connected low, normal RS-485 polarity conventions apply. Internally pulled low.
DINV
8
-
Driver polarity selection input. When driven high this pin swaps the polarity of the driver output pins. If unconnected
(floating) or connected low, normal RS-485 polarity conventions apply. Internally pulled low.
FN7638 Rev 4.00
May 13, 2015
Page 4 of 18
ISL31483E, ISL31485E
Truth Tables
RECEIVING
INPUTS
TRANSMITTING
INPUTS
OUTPUTS
OUTPUT
RE
DE
(Half Duplex)
DE
(Full Duplex)
A-B
INV or
RINV
RO
-0.01V
0
1
RE
DE
DI
INV or DINV
Y
Z
0
0
X
X
1
1
0
1
0
0
0
X
-0.2V
0
0
0
0
X
0.01V
1
1
0
0
X
0.2V
1
0
0
0
X
Inputs
Open or
Shorted
X
1
1
0
0
X
X
High-Z*
1
1
1
X
X
High-Z
X
1
0
0
0
1
X
1
1
1
0
1
X
1
0
1
1
0
0
0
X
X
High-Z
High-Z
1
0
X
X
High-Z*
High-Z*
NOTE: *Low Power Shutdown Mode (See Note 11), except for ISL31485E.
NOTE: *Low Power Shutdown Mode (See Note 11), except for ISL31485E.
Typical Operating Circuits
+5V
+5V
+
8
0.1µF
0.1µF
+
8
VCC
VCC
2
INV
1 RO
R
A/Y
6
B/Z
7
RT
RT
7
B/Z
6
A/Y
RO 1
R
DE 3
3 DE
4 DI
DI 4
D
D
GND
GND
5
INV
2
5
NOTE: The IC on the left has the cable connections
swapped, so the INV pin is strapped high to invert its Rx and
Tx polarity.
FIGURE 3. ISL31485E HALF DUPLEX EXAMPLE
+5V
+5V
+
13, 14
1
RINV
2 RO
VCC
R
B 11
0.1µF
0.1µF
RT
+
13, 14
VCC
9 Y
A 12
D
10 Z
3 RE
DE 4
4 DE
5 DI
8
DI 5
Y 9
Z 10
D
DINV
RT
RE 3
11 B
12 A
GND
GND
R
RO 2
RINV
DINV
1
8
6, 7
6, 7
NOTE: The IC on the left has the cable connections swapped, so the INV
pins (1, 8) are strapped high to invert its Rx and Tx polarity.
FIGURE 4. ISL31483E FULL DUPLEX EXAMPLE
FN7638 Rev 4.00
May 13, 2015
Page 5 of 18
ISL31483E, ISL31485E
Absolute Maximum Ratings
Thermal Information
VCC to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, INV, RINV, DINV, DE, RE. . . . . . . . . . . . . . . . . . . . -0.3V to (VCC + 0.3V)
Input/Output Voltages
A/Y, B/Z, A, B, Y, Z. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±60V
A/Y, B/Z, A, B, Y, Z (Transient Pulse Through 100Ω, Note 15). . . . ±80V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VCC +0.3V)
Short-circuit Duration
Y, Z. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Latch-up per JESD78, Level 2, Class A . . . . . . . . . . . . . . . . . . . . . . . +125°C
Thermal Resistance (Typical)
JA (°C/W) JC (°C/W)
8 Ld SOIC Package (Notes 4, 5). . . . . . . . . .
104
47
14 Ld SOIC Package (Notes 4, 5) . . . . . . . .
78
42
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . . -65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .see TB493
Recommended Operating Conditions
Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
Temperature Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Bus Pin Common Mode Voltage Range . . . . . . . . . . . . . . . . . -25V to +25V
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.
NOTES:
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.
5. For JC, the “case temp” location is taken at the package top center.
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = +25°C (Note 6).
Boldface limits apply across the operating temperature range, -40°C to +85°C.
PARAMETER
TEMP
(°C)
MIN
(Note 14)
TYP
MAX
(Note 14)
UNIT
Full
-
-
VCC
V
RL = 100Ω (RS-422)
Full
2.4
3.2
-
V
SYMBOL
TEST CONDITIONS
DC CHARACTERISTICS
Driver Differential VOUT
(No load)
VOD1
Driver Differential VOUT
(Loaded, Figure 5A)
VOD2
Change in Magnitude of Driver
Differential VOUT for
Complementary Output
States
VOD
Driver Differential VOUT with
Common Mode Load
(Figure 5B)
VOD3
Driver Common-Mode VOUT
(Figure 5)
VOC
RL = 54Ω (RS-485)
Full
1.5
2.5
VCC
V
RL = 54Ω (PROFIBUS, VCC ≥ 5V)
Full
2.0
2.5
-
V
RL = 21Ω (Six 120Ω terminations for Star
Configurations, VCC ≥ 4.75V)
Full
0.8
1.3
-
V
RL = 54Ω or 100Ω (Figure 5A)
Full
-
-
0.2
V
RL = 60Ω, -7V ≤ VCM ≤ 12V
Full
1.5
2.1
VCC
RL = 60Ω, -25V ≤ VCM ≤ 25V (VCC ≥ 4.75V)
Full
1.7
2.3
RL = 21Ω, -15V ≤ VCM ≤ 15V (VCC ≥ 4.75V)
Full
0.8
1.1
-
V
RL = 54Ω or 100Ω
Full
-1
-
3
V
V
V
RL = 60Ω or 100Ω, -20V ≤ VCM ≤ 20V
Full
-2.5
-
5
V
Change in Magnitude of Driver
Common-mode VOUT for
Complementary Output
States
DVOC
RL = 54Ω or 100Ω (Figure 5A)
Full
-
-
0.2
V
Driver Short-circuit Current
IOSD
DE = VCC, -25V ≤ VO ≤ 25V (Note 8)
Full
-250
-
250
mA
IOSD1
At first fold-back, 22V ≤ VO ≤ -22V
Full
-83
83
mA
IOSD2
At second fold-back, 35V ≤ VO ≤ -35V
Full
-13
13
mA
Logic Input High Voltage
VIH
DE, DI, RE, INV, RINV, DINV
Full
2.5
-
-
V
Logic Input Low Voltage
VIL
DE, DI, RE, INV, RINV, DINV
Full
-
-
0.8
V
Logic Input Current
IIN1
DI
Full
-1
-
1
µA
DE, RE, INV, RINV, DINV
Full
-15
6
15
µA
FN7638 Rev 4.00
May 13, 2015
Page 6 of 18
ISL31483E, ISL31485E
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = +25°C (Note 6).
Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
Input/Output Current
(A/Y, B/Z)
Input Current (A, B)
(Full Duplex Versions Only)
Output Leakage Current (Y, Z)
(Full Duplex Versions Only)
Receiver Differential
Threshold Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
SYMBOL
IIN2
TEST CONDITIONS
MIN
(Note 14)
TYP
MAX
(Note 14)
UNIT
VIN = 12V
Full
-
110
250
µA
VIN = -7V
Full
-200
-75
-
µA
VIN = ±25V
Full
-800
±240
800
µA
VIN = ±60V
(Note 17)
Full
-6
±0.7
6
mA
VIN = 12V
Full
-
90
125
µA
VIN = -7V
Full
-100
-70
-
µA
VIN = ±25V
Full
-500
±200
500
µA
VIN = ±60V
(Note 17)
Full
-3
±0.5
3
mA
VIN = 12V
Full
-
20
200
µA
VIN = -7V
Full
-100
-5
-
µA
VIN = ±25V
Full
-500
±40
500
µA
VIN = ±60V
(Note 17)
Full
-3
±0.15
3
mA
A-B if INV or RINV = 0; B-A if INV or RINV = 1,
-25V ≤ VCM ≤ 25V
Full
-200
-100
-10
mV
V TH
-25V ≤ VCM ≤ 25V
25
-
25
-
mV
VOH1
VID = -10mV
IO = -2mA
Full
VCC - 0.5
4.75
-
V
IO = -8mA
Full
2.8
4.2
-
V
IIN3
IOZD
V TH
DE = 0V, VCC = 0V or
5.5V
TEMP
(°C)
VCC = 0V or 5.5V
RE = 0V, DE = 0V,
VCC = 0V or 5.5V
VOH2
Receiver Output Low Voltage
VOL
IO = 6mA, VID = -200mV
Full
-
0.27
0.4
V
Receiver Output Low Current
IOL
VO = 1V, VID = -200mV
Full
15
22
-
mA
Three-state (High Impedance)
Receiver Output Current
IOZR
0V ≤ VO ≤ VCC (Note 16)
Full
-1
0.01
1
µA
Receiver Short-circuit Current
IOSR
0V ≤ VO ≤ VCC
Full
±12
-
±110
mA
DE = VCC, RE = 0V or VCC, DI = 0V or VCC
Full
-
2.3
4.5
mA
DE = 0V, RE = VCC, DI = 0V or VCC (Note 16)
Full
-
10
50
µA
Human Body Model
(Tested per JESD22-A114E)
25
-
±2
-
kV
Machine Model
(Tested per JESD22-A115-A)
25
-
±700
-
V
Full
-
70
125
ns
SUPPLY CURRENT
No-load Supply Current
(Note 7)
Shutdown Supply Current
ICC
ISHDN
ESD PERFORMANCE
All Pins
DRIVER SWITCHING CHARACTERISTICS
Driver Differential Output
Delay
tPLH, tPHL
RD = 54Ω, CD = 50pF No CM Load
(Figure 6)
-25V ≤ VCM ≤ 25V
Driver Differential Output
Skew
tSKEW
RD = 54Ω, CD = 50pF No CM Load
(Figure 6)
-25V ≤ VCM ≤ 25V
(Note 18)
Driver Differential Rise or Fall
Time
tR, tF
Maximum Data Rate
fMAX
RD = 54Ω, CD = 50pF No CM Load
(Figure 6)
-25V ≤ VCM ≤ 25V
Full
-
-
350
ns
Full
-
4.5
15
ns
Full
-
-
25
ns
Full
70
170
300
ns
Full
70
-
550
ns
CD = 820pF (Figure 8)
Full
1
4
-
Mbps
tZH
SW = GND (Figure 7), (Note 9)
Full
-
-
350
ns
Driver Enable to Output Low
tZL
SW = VCC (Figure 7), (Note 9)
Full
-
-
300
ns
Driver Disable from Output
Low
tLZ
SW = VCC (Figure 7)
Full
-
-
120
ns
Driver Enable to Output High
FN7638 Rev 4.00
May 13, 2015
Page 7 of 18
ISL31483E, ISL31485E
Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are at VCC = 5V, TA = +25°C (Note 6).
Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
PARAMETER
Driver Disable from Output
High
Time to Shutdown
TEMP
(°C)
MIN
(Note 14)
TYP
MAX
(Note 14)
UNIT
SW = GND (Figure 7)
Full
-
-
120
ns
SYMBOL
tHZ
tSHDN
TEST CONDITIONS
(Notes 11, 16)
Full
60
160
600
ns
Driver Enable from Shutdown
to Output High
tZH(SHDN)
SW = GND (Figure 7),
(Notes 11, 12, 16)
Full
-
-
2000
ns
Driver Enable from Shutdown
to Output Low
tZL(SHDN)
SW = VCC (Figure 7),
(Notes 11, 12, 16)
Full
-
-
2000
ns
RECEIVER SWITCHING CHARACTERISTICS
Maximum Data Rate
fMAX
-25V ≤ VCM ≤ 25V (Figure 9)
Full
1
15
-
Mbps
-15V ≤ VCM ≤ 15V (Figure 9)
Full
1
12
-
Mbps
-25V ≤ VCM ≤ 25V (Figure 9)
Full
-
90
150
ns
(Figure 9)
Full
-
4
10
ns
Receiver Input to Output Delay
tPLH, tPHL
Receiver Skew | tPLH - tPHL |
tSKD
Receiver Enable to Output Low
tZL
RL = 1kΩ, CL = 15pF, SW = VCC (Figure 10),
(Notes 10, 16)
Full
-
-
50
ns
Receiver Enable to Output High
tZH
RL = 1kΩ, CL = 15pF, SW = GND (Figure 10),
(Notes 10, 16)
Full
-
-
50
ns
Receiver Disable from Output
Low
tLZ
RL = 1kΩ, CL = 15pF, SW = VCC (Figure 10)
(Note 16)
Full
-
-
50
ns
Receiver Disable from Output
High
tHZ
RL = 1kΩ, CL = 15pF, SW = GND (Figure 10)
(Note 16)
Full
-
-
50
ns
(Notes 11, 16)
Full
60
160
600
ns
Receiver Enable from
Shutdown to Output High
tZH(SHDN)
RL = 1kΩ, CL = 15pF, SW = GND (Figure 10),
(Notes 11, 13, 16)
Full
-
-
2000
ns
Receiver Enable from
Shutdown to Output Low
tZL(SHDN)
RL = 1kΩ, CL = 15pF, SW = VCC (Figure 10),
(Notes 11, 13, 16)
Full
-
-
2000
ns
Time to Shutdown
tSHDN
NOTES:
6. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise
specified.
7. Supply current specification is valid for loaded drivers when DE = 0V.
8. Applies to peak current. See “Typical Performance Curves” beginning on page 14 for more information
9. Keep RE = 0 to prevent the device from entering SHDN.
10. The RE signal high time must be short enough (typically 600ns to ensure that the device enters SHDN.
13. Set the RE signal high time >600ns to ensure that the device enters SHDN.
14. 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.
15. Tested according to TIA/EIA-485-A, Section 4.2.6 (±80V for 15ms at a 1% duty cycle).
16. Does not apply to the ISL31485E. The ISL31485E has no Rx enable function and thus no SHDN function.
17. See “Caution” statement under the “Recommended Operating Conditions” section on page 6.
18. This parameter is not production tested.
FN7638 Rev 4.00
May 13, 2015
Page 8 of 18
ISL31483E, ISL31485E
Test Circuits and Waveforms
VCC
RL/2
DE
Z
DI
Z
DI
VOD
D
375Ω
RL/2
DE
VCC
VCM
VOD
D
Y
Y
VOC
RL/2
VOC
RL/2
375Ω
FIGURE 5B. VOD AND VOC WITH COMMON MODE LOAD
FIGURE 5A. VOD AND VOC
FIGURE 5. DC DRIVER TEST CIRCUITS
3V
DI
50%
50%
0V
VCC
tPHL
tPLH
375Ω*
DE
OUT (Z)
VOH
OUT (Y)
VOL
Z
DI
CD
D
RD
Y
SIGNAL
GENERATOR
VCM
375Ω*
DIFF OUT (Y - Z)
*ONLY USED FOR COMMON
MODE LOAD TESTS
90%
+VOD
90%
10%
10%
tR
-VOD
tF
SKEW = |tPLH - tPHL|
FIGURE 6A. TEST CIRCUIT
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE
Z
DI
110Ω
VCC
D
SIGNAL
GENERATOR
SW
Y
GND
CL
3V
DE
(Note 11)
tZH, tZH(SHDN)
(Note 11)
PARAMETER
OUTPUT
RE
DI
SW
CL (pF)
tHZ
Y/Z
X
1/0
GND
50
tLZ
Y/Z
X
0/1
VCC
50
tZH
Y/Z
0 (Note 9)
1/0
GND
100
tZL
Y/Z
0 (Note 9)
0/1
VCC
100
tZH(SHDN)
Y/Z
1 (Note 12)
1/0
GND
100
tZL(SHDN)
Y/Z
1 (Note 12)
0/1
VCC
100
FIGURE 7A. TEST CIRCUIT
50%
50%
0V
tHZ
OUTPUT HIGH
VOH - 0.5V
2.3V
OUT (Y, Z)
VOH
0V
tZL, tZL(SHDN)
tLZ
(Note 11)
VCC
OUT (Y, Z)
2.3V
VOL + 0.5V
OUTPUT LOW
VOL
FIGURE 7B. MEASUREMENT POINTS
FIGURE 7. DRIVER ENABLE AND DISABLE TIMES
FN7638 Rev 4.00
May 13, 2015
Page 9 of 18
ISL31483E, ISL31485E
Test Circuits and Waveforms (Continued)
VCC
DE
3V
+
Z
DI
54Ω
D
DI
VOD
CD
Y
0V
-
SIGNAL
GENERATOR
+VOD
DIFF OUT (Y - Z)
-VOD
FIGURE 8A. TEST CIRCUIT
0V
FIGURE 8B. MEASUREMENT POINTS
FIGURE 8. DRIVER DATA RATE
RE
R
A
SIGNAL
GENERATOR
B
15pF
B
VCM + 750mV
VCM
RO
VCM
VCM - 750mV
A
tPLH
SIGNAL
GENERATOR
tPHL
VCC
50%
RO
VCM
50%
0V
FIGURE 9B. MEASUREMENT POINTS
FIGURE 9A. TEST CIRCUIT
FIGURE 9. RECEIVER PROPAGATION DELAY AND DATA RATE
(Note 11)
RE
3V
B
A
1kΩ
RO
R
SIGNAL
GENERATOR
15pF
VCC
SW
RE
50%
0V
GND
tZH, tZH(SHDN)
(Note 11)
DE
A
SW
tHZ
0
+1.5V
GND
tLZ
0
-1.5V
VCC
(Note 11)
tZH (Note 10)
0
+1.5V
GND
RO
tZL (Note 10)
0
-1.5V
VCC
tZH(SHDN) (Note 13)
0
+1.5V
GND
tZL(SHDN) (Note 13)
0
-1.5V
VCC
FIGURE 10A. TEST CIRCUIT
tHZ
OUTPUT HIGH
VOH - 0.5V
1.5V
RO
PARAMETER
50%
VOH
0V
tZL, tZL(SHDN)
tLZ
VCC
1.5V
VOL + 0.5V
OUTPUT LOW
VOL
FIGURE 10B. MEASUREMENT POINTS
FIGURE 10. RECEIVER ENABLE AND DISABLE TIMES
FN7638 Rev 4.00
May 13, 2015
Page 10 of 18
ISL31483E, ISL31485E
Application Information
The RS-485 and RS-422 are differential (balanced) data
transmission standards used for long haul or noisy environments.
The RS-422 is a subset of RS-485, so RS-485 transceivers are
also RS-422 compliant. The RS-422 is a point-to-multipoint
(multidrop) standard, which allows only one driver and up to 10
(assuming one unit load devices) receivers on each bus. The
RS-485 is a true multipoint standard, which allows up to 32 one
unit load devices (any combination of drivers and receivers) on
each bus. To allow for multipoint operation, the RS-485
specification requires that drivers must handle bus contention
without sustaining any damage.
Another important advantage of RS-485 is the extended
Common Mode Range (CMR), which specifies that the driver
outputs and receiver inputs withstand signals that range from
+12V to -7V. The RS-422 and RS-485 are intended for runs as
long as 4000, so the wide CMR is necessary to handle ground
potential differences, as well as voltages induced in the cable by
external fields.
The ISL3148xE is a family of ruggedized RS-485 transceivers
that improves on the RS-485 basic requirements and therefore
increases system reliability. The CMR increases to ±25V, while
the RS-485 bus pins (receiver inputs and driver outputs) include
fault protection against voltages and transients up to ±60V.
Additionally, larger than required differential output voltages
(VOD) increase noise immunity.
Receiver (Rx) Features
These devices utilize a differential input receiver for maximum
noise immunity and common mode rejection. Input sensitivity is
better than ±200mV, as required by the RS-422 and RS-485
specifications.
Receiver input (load) current surpasses the RS-422 specification
of 3mA and is four times lower than the RS-485 “Unit Load (UL)”
requirement of 1mA maximum. Thus, these products are known
as “one-quarter UL” transceivers and there can be up to 128 of
these devices on a network while still complying with the RS-485
loading specification.
The Rx functions with common mode voltages as great as ±25V,
making them ideal for industrial, or long networks where induced
voltages are a realistic concern.
All the receivers include a “full fail-safe” function that guarantees
a high level receiver output if the receiver inputs are unconnected
(floating), shorted together, or connected to a terminated bus
with all the transmitters disabled (i.e., an idle bus).
Rx outputs feature high drive levels (typically 22mA at VOL = 1V) to
ease the design of optically coupled isolated interfaces. Except for
the ISL31485E, Rx outputs are three-statable via the active low
RE input.
The Rx includes noise filtering circuitry to reject high frequency
signals and typically rejects pulses narrower than 50ns
(equivalent to 20Mbps).
FN7638 Rev 4.00
May 13, 2015
Driver (Tx) Features
The RS-485/RS-422 driver is a differential output device that
delivers at least 1.5V across a 54Ω load (RS-485) and at least
2.4V across a 100Ω load (RS-422). The drivers feature low
propagation delay skew to maximize bit width and to minimize
EMI and all drivers are three-statable via the active high DE input.
The driver outputs are slew rate limited to minimize EMI and to
minimize reflections in unterminated or improperly terminated
networks.
High Overvoltage (Fault) Protection
Increases Ruggedness
The ±60V (referenced to the IC GND) fault protection on the
RS-485 pins, makes these transceivers some of the most rugged
on the market. This level of protection makes the ISL3148xE
perfect for applications where power (e.g., 24V and 48V supplies)
must be routed in the conduit with the data lines, or for outdoor
applications where large transients are likely to occur. When
power is routed with the data lines, even a momentary short
between the supply and data lines will destroy an unprotected
device. The ±60V fault levels of this family are at least five times
higher than the levels specified for standard RS-485 ICs. The
ISL3148xE protection is active whether the Tx is enabled or
disabled and even if the IC is powered down.
If transients or voltages (including overshoots and ringing)
greater then ±60V are possible, then additional external
protection is required.
Widest Common Mode Voltage (CMV)
Tolerance Improves Operating Range
The RS-485 networks operating in industrial complexes, or over
long distances, are susceptible to large CMV variations. Either of
these operating environments may suffer from large
node-to-node ground potential differences, or CMV pickup from
external electromagnetic sources and devices with only the
minimum required +12V to -7V CMR may malfunction. The
ISL3148xE’s extended ±25V CMR is the widest available,
allowing operation in environments that would overwhelm lesser
transceivers. Additionally, the Rx will not phase invert
(erroneously change state) even with CMVs of ±40V, or
differential voltages as large as 40V.
Cable Invert (Polarity Reversal) Function
With large node count RS-485 networks, it is common for some
cable data lines to be wired backwards during installation. When
this happens the node is unable to communicate over the
network. Once a technician finds the miswired node, he must
then rewire the connector which is time consuming.
The ISL31483E and ISL31485E simplify this task by including
cable invert pins (INV, DINV, RINV) that allow the technician to
invert the polarity of the Rx input and/or the Tx output pins
simply by moving a jumper to change the state of the invert
pin(s). When the invert pin(s) is low, the IC operates like any
standard RS-485 transceiver and the bus pins have their normal
polarity definition of A and Y being noninverting and B and Z
being inverting. With the invert pin high, the corresponding bus
Page 11 of 18
ISL31483E, ISL31485E
pins reverse their polarity, so B and Z are now noninverting and A
and Y become inverting.
High VOD Improves Noise Immunity and
Flexibility
The ISL3148xE driver design delivers larger differential output
voltages (VOD) than the RS-485 standard requires, or than most
RS-485 transmitters can deliver. The typical ±2.5V VOD provides
more noise immunity than networks built using many other
transceivers.
Another advantage of the large VOD is the ability to drive more
than two bus terminations, which allows for utilizing the
ISL3148xE in “star” and other multi-terminated, nonstandard
network topologies.
Figure 12, details the transmitter’s VOD vs IOUT characteristic and
includes load lines for four (30Ω) and six (20Ω) 120Ω
terminations. Figure 12 shows that the driver typically delivers
±1.3V into six terminations and the “Electrical Specification” on
page 6 guarantees a VOD of ±0.8V at 21Ω over the full
temperature range. The RS-485 standard requires a minimum
1.5V VOD into two terminations, but the ISL3148xE deliver
RS-485 voltage levels with 2x to 3x the number of terminations.
Hot Plug Function
When a piece of equipment powers up, there is a period of time
where the processor or ASIC driving the RS-485 control lines (DE,
RE) is unable to ensure that the RS-485 Tx and Rx outputs are
kept disabled. If the equipment is connected to the bus, a driver
activating prematurely during power-up may crash the bus. To
avoid this scenario, the ISL3148xE devices incorporate a “Hot
Plug” function. Circuitry monitoring VCC ensures that, during
power-up and power-down, the Tx and Rx outputs remain disabled,
regardless of the state of DE and RE, if VCC is less than ≈3.5V. This
gives the processor/ASIC a chance to stabilize and drive the RS-485
control lines to the proper states. Figure 11 illustrates the power-up
and power-down performance of the ISL3148xE compared to an
RS-485 IC without the Hot Plug feature.
FN7638 Rev 4.00
May 13, 2015
2.5
VCC
VCC (V)
2.8V
5.0
0
5.0
RL = 1kΩ
2.5
0
A/Y
ISL3148XE
RL = 1kΩ
RO
ISL3148XE
5.0
2.5
0
TIME (40µs/DIV)
RECEIVER OUTPUT (V)
The full duplex ISL31483E includes two invert pins that allow for
separate control of the Rx and Tx polarities. If only the Rx cable is
miswired, then only the RINV pin need be driven to a logic 1. If
the Tx cable is miswired, then DINV must be connected to a logic
high. The two half duplex versions have only one logic pin (INV)
that, when high, switches the polarity of both the Tx and the Rx
blocks.
RE = GND
3.5V
DRIVER Y OUTPUT (V)
Intersil’s unique cable invert function is superior to that found on
competing devices because the Rx full failsafe function is
maintained even when the Rx polarity is reversed. Competitor
devices implement the Rx invert function simply by inverting the
Rx output. This means that with the Rx inputs floating or shorted
together, the Rx appropriately delivers a logic 1 in normal
polarity, but outputs a logic low when the IC is operated in the
inverted mode. Intersil’s innovative Rx design guarantees that
with the Rx inputs floating, or shorted together (VID = 0V), the Rx
output remains high regardless of the state of the invert pins.
DE, DI = VCC
FIGURE 11. HOT PLUG PERFORMANCE ISL3148XE vs ISL83088E
WITHOUT HOT PLUG CIRCUITRY
Data Rate, Cables and Terminations
The RS-485/RS-422 are intended for network lengths up to
4000, but the maximum system data rate decreases as the
transmission length increases. These 1Mbps versions can
operate at full data rates with lengths up to 800’ (244m). Jitter is
the limiting parameter at this data rate, so employing encoded
data streams (e.g., Manchester coded or Return to Zero) may
allow increased transmission distances.
Twisted pair is the cable of choice for RS-485/RS-422 networks.
Twisted pair cables tend to pick up noise and other
electromagnetically induced voltages as common mode signals,
which are effectively rejected by the differential receivers in
these ICs. Proper termination is imperative to minimize
reflections and terminations are recommended unless power
dissipation is an overriding concern. In point-to-point, or
point-to-multipoint (single driver on bus like RS-422) networks,
the main cable should be terminated in its characteristic
impedance (typically 120Ω) at the end farthest from the driver. In
multi-receiver applications, stubs connecting receivers to the
main cable should be kept as short as possible. Multipoint
(multi-driver) systems require that the main cable be terminated
in its characteristic impedance at both ends. Stubs connecting a
transceiver to the main cable should be kept as-short-as
possible.
Built-in Driver Overload Protection
As stated previously, the RS-485 specification requires that
drivers survive worst case bus contentions undamaged. These
transceivers meet this requirement via driver output short-circuit
current limits and on-chip thermal shutdown circuitry.
The driver output stages incorporate a double foldback
short-circuit current limiting scheme which ensures that the
output current never exceeds the RS-485 specification, even at
the common mode and fault condition voltage range extremes.
The first foldback current level (≈70mA) is set to ensure that the
driver never folds back when driving loads with common mode
voltages up to ±25V. The very low second foldback current
setting (≈9mA) minimizes power dissipation if the Tx is enabled
when a fault occurs.
Page 12 of 18
ISL31483E, ISL31485E
In the event of a major short-circuit condition, devices also include
a thermal shutdown feature that disables the drivers whenever the
die temperature becomes excessive. This eliminates the power
dissipation, allowing the die to cool. The drivers automatically
reenable after the die temperature drops about 15°C. If the
contention persists, the thermal shutdown/re-enable cycle repeats
until the fault is cleared. Receivers stay operational during thermal
shutdown.
Low Power Shutdown Mode
These CMOS transceivers all use a fraction of the power required
by competitive devices, but they also include a shutdown feature
(except the ISL31485E) that reduces the already low quiescent
ICC to a 10µA trickle. These devices enter shutdown whenever
the receiver and driver are simultaneously disabled (RE = VCC
and DE = GND) for a period of at least 600ns. Disabling both the
driver and the receiver for less than 60ns guarantees that the
transceiver will not enter shutdown.
Note that receiver and driver enable times increase when the
transceiver enables from shutdown. Refer to Notes 9, 10, 11, 12
and 13, at the end of the “Electrical Specification” table on
page 8, for more information.
FN7638 Rev 4.00
May 13, 2015
Page 13 of 18
ISL31483E, ISL31485E
Typical Performance Curves
VCC = 5V, TA = +25°C; Unless Otherwise Specified.
3.6
80
DIFFERENTIAL OUTPUT VOLTAGE (V)
DRIVER OUTPUT CURRENT (mA)
90
RD = 30Ω
70
RD = 54Ω
60
+25°C
+85°C
50
40
RD = 100Ω
30
20
10
0
0
1
2
3
4
DIFFERENTIAL OUTPUT VOLTAGE (V)
3.4
RD = 100Ω
3.2
3.0
2.8
RD = 54Ω
2.6
2.4
2.2
-40
5
FIGURE 12. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT
VOLTAGE
-25
0
25
50
TEMPERATURE (°C)
75
85
FIGURE 13. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
150
2.45
+85°C
2.40
100
DE = VCC, RE = X
OUTPUT CURRENT (mA)
2.35
ICC (mA)
2.30
2.25
DE = GND, RE = GND
2.20
2.15
2.10
-25
0
25
50
TEMPERATURE (°C)
75
-50
+25°C
Y OR Z = HIGH
+85°C
0
10
20
30
40
50
OUTPUT VOLTAGE (V)
FIGURE 15. DRIVER OUTPUT CURRENT vs SHORT-CIRCUIT
VOLTAGE
800
70
60
600
VOL, +25°C
50
BUS PIN CURRENT (µA)
RECEIVER OUTPUT CURRENT (mA)
0
-150
-60 -50 -40 -30 -20 -10
85
FIGURE 14. SUPPLY CURRENT vs TEMPERATURE
VOL, +85°C
40
30
20
10
0
-10
VOH, +85°C
VOH, +25°C
0
1
2
3
4
5
RECEIVER OUTPUT VOLTAGE (V)
FIGURE 16. RECEIVER OUTPUT CURRENT vs RECEIVER OUTPUT
VOLTAGE
FN7638 Rev 4.00
May 13, 2015
400
200
Y or Z
0
-200
A/Y or B/Z
-400
-20
-30
+25°C
-100
2.05
2.00
-40
Y OR Z = LOW
50
-600
-70
-50
-30
-10 0 10
30
50
70
BUS PIN VOLTAGE (V)
FIGURE 17. BUS PIN CURRENT vs BUS PIN VOLTAGE
Page 14 of 18
60
ISL31483E, ISL31485E
Typical Performance Curves
VCC = 5V, TA = +25°C; Unless Otherwise Specified. (Continued)
4.0
85
RD = 54Ω, CD = 50pF
RD = 54Ω, CD = 50pF
PROPAGATION DELAY (ns)
80
3.5
70
SKEW (ns)
75
tPLH
65
3.0
tPHL
60
2.5
55
|tPLH - tPHL|
75
85
VOLTAGE (V)
FIGURE 18. DRIVER DIFFERENTIAL PROPAGATION DELAY vs
TEMPERATURE
25
20
15
10
5
0
5
0
-5
-10
-15
-20
-25
A
B
VID = ±1V
RO
RO
A
B
TIME (400ns/DIV)
FIGURE 20. RECEIVER PERFORMANCE WITH ±25V CMV
0
50
25
TEMPERATURE (°C)
-25
FIGURE 19. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE
RD = 54Ω, CD = 50pF
5
DI
0
5
0
3
2
1
0
-1
-2
-3
RO
A/Y - B/Z
TIME (400ns/DIV)
FIGURE 21. DRIVER AND RECEIVER WAVEFORMS
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
PROCESS:
Si Gate BiCMOS
FN7638 Rev 4.00
May 13, 2015
85
75
Page 15 of 18
DRIVER INPUT (V)
25
0
50
TEMPERATURE (°C)
RECEIVER OUTPUT (V)
-25
2.0
-40
DRIVER OUTPUT (V)
50
-40
ISL31483E, ISL31485E
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have
the latest Rev.
DATE
REVISION
CHANGE
May 13, 2015
FN7638.4
Changed "MAX" on “Driver Differential Rise or Fall Time” on page 7 from 400 to 550.
February 9, 2015
FN7638.3
Removed references to '480E and '486E in title and rest of document.
Description on page 1, removed the last paragraph ("The '480E and '486E feature a logic . . . ")
Under "Features", in the 3rd bullet removed references to '480E and removed the 4th bullet ("Logic Supply (VL)
. . . ")
On page 4, removed the '480E (col 2) and '486E (cols 5, 6, 7) entries from the "Pin Description" table and
removed the "VL" "PD" and "NC" rows from this table.
On page 6, removed row labeled "RO (480E, 496E)" in "Abs Max" table, removed all three 10 and 12 LD pkg
entries from the "Thermal Info" section, removed Notes 5 and 7 and renumber all notes and note references.
Stamped data sheet "Not recommended for New Designs. For an exact replacement, please see the ISL32483E,
ISL32485E Series data sheet".
Removed MSOP and TDFN from “Thermal Information” and (2) PODs.
Thermal Information on page 6: 8 Ld SOIC Package, changed theta JA from 116 to 104.
Thermal Information on page 6: 14 Ld SOIC Package, changed theta JA from 88 to 78 and theta JC from 38 to
42.
On page 3, in Table 1 and the "Ordering Information " table, removed the devices marked "Coming Soon" (480E
and 486E versions). Also removed unneeded PODs.
January 7, 2011
FN7638.2
Changed Note 17 to Note 15 in “Absolute Maximum Ratings” on page 6
Changed Notes 10 and 13 to Notes 9 and 12 in Figure 7A on page 9
Changed Note 14 to Note 13 in Figure 10A on page 10
Deleted Note 17 (See Figure 9 for more information and for performance over-temperature)
Changed TYP on “Driver Differential Rise or Fall Time” on page 7 from 230 to 170
Added Figure 15 “DRIVER OUTPUT CURRENT vs SHORT-CIRCUIT VOLTAGE”
Updated “Package Outline Drawing” on page 18. Updated to new POD format by removing table and moving
dimensions onto drawing and adding land pattern.
September 8, 2010
FN7638.1
Corrected test conditions for “Receiver Output High Voltage” for “VOH5” on page 7 from “IO = -500mA” to
“IO = -500µA”
Jun 25, 2010
FN7638.0
Initial Release
About Intersil
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address some of the largest markets within the industrial and infrastructure, mobile computing and high-end consumer markets.
For the most updated datasheet, application notes, related documentation and related parts, please see the respective product
information page found at www.intersil.com.
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Reliability reports are also available from our website at www.intersil.com/support
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Intersil products are manufactured, assembled and tested utilizing ISO9001 quality systems as noted
in the quality certifications found at www.intersil.com/en/support/qualandreliability.html
Intersil products are sold by description only. Intersil may modify the circuit design and/or specifications of products at any time without notice, provided that such
modification does not, in Intersil's sole judgment, affect the form, fit or function of the product. Accordingly, the reader is cautioned to verify that datasheets are
current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its
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For information regarding Intersil Corporation and its products, see www.intersil.com
FN7638 Rev 4.00
May 13, 2015
Page 16 of 18
ISL31483E, ISL31485E
Package Outline Drawing
M14.15
14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
Rev 1, 10/09
8.65
A 3
4
0.10 C A-B 2X
6
14
DETAIL"A"
8
0.22±0.03
D
6.0
3.9
4
0.10 C D 2X
0.20 C 2X
7
PIN NO.1
ID MARK
5
0.31-0.51
B 3
(0.35) x 45°
4° ± 4°
6
0.25 M C A-B D
TOP VIEW
0.10 C
1.75 MAX
H
1.25 MIN
0.25
GAUGE PLANE C
SEATING PLANE
0.10 C
0.10-0.25
1.27
SIDE VIEW
(1.27)
DETAIL "A"
(0.6)
NOTES:
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2. Dimensioning and tolerancing conform to ASME Y14.5m-1994.
3. Datums A and B to be determined at Datum H.
(5.40)
4. Dimension does not include interlead flash or protrusions.
Interlead flash or protrusions shall not exceed 0.25mm per side.
5. The pin #1 identifier may be either a mold or mark feature.
(1.50)
6. Does not include dambar protrusion. Allowable dambar protrusion
shall be 0.10mm total in excess of lead width at maximum condition.
7. Reference to JEDEC MS-012-AB.
TYPICAL RECOMMENDED LAND PATTERN
FN7638 Rev 4.00
May 13, 2015
Page 17 of 18
ISL31483E, ISL31485E
Package Outline Drawing
M8.15
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
Rev 4, 1/12
DETAIL "A"
1.27 (0.050)
0.40 (0.016)
INDEX
6.20 (0.244)
5.80 (0.228)
AREA
0.50 (0.20)
x 45°
0.25 (0.01)
4.00 (0.157)
3.80 (0.150)
1
2
8°
0°
3
0.25 (0.010)
0.19 (0.008)
SIDE VIEW “B”
TOP VIEW
2.20 (0.087)
SEATING PLANE
5.00 (0.197)
4.80 (0.189)
1.75 (0.069)
1.35 (0.053)
1
8
2
7
0.60 (0.023)
1.27 (0.050)
3
6
4
5
-C-
1.27 (0.050)
0.51(0.020)
0.33(0.013)
SIDE VIEW “A
0.25(0.010)
0.10(0.004)
5.20(0.205)
TYPICAL RECOMMENDED LAND PATTERN
NOTES:
1. Dimensioning and tolerancing per ANSI Y14.5M-1994.
2. Package length does not include mold flash, protrusions or gate burrs.
Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006
inch) per side.
3. Package width does not include interlead flash or protrusions. Interlead
flash and protrusions shall not exceed 0.25mm (0.010 inch) per side.
4. The chamfer on the body is optional. If it is not present, a visual index
feature must be located within the crosshatched area.
5. Terminal numbers are shown for reference only.
6. The lead width as measured 0.36mm (0.014 inch) or greater above the
seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch).
7. Controlling dimension: MILLIMETER. Converted inch dimensions are not
necessarily exact.
8. This outline conforms to JEDEC publication MS-012-AA ISSUE C.
FN7638 Rev 4.00
May 13, 2015
Page 18 of 18
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