DATASHEET
ISL4485E
FN6049
Rev 4.00
Oct 8, 2018
±15kV ESD Protected, 20Mbps, 5V, Low Power, RS-485/RS-422 Transceiver
Features
The ISL4485E is a high speed, BiCMOS 5V powered, single
transceiver that meets 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 device is
specified for 10% tolerance supplies (4.5V to 5.5V).
• Pb-free available (RoHS compliant)
• High data rates . . . . . . . . . . . . . . . . . . . . . . up to 20Mbps
• RS-485 I/O pin ESD protection . . . . . . . . . . . 15kV HBM
- Class 3 ESD level on all other pins . . . . . . . >7kV HBM
The excellent differential output voltage coupled with high
drive-current output stages allow 20Mbps operation over
twisted pair networks up to 450ft in length. The 25kΩ
receiver input resistance presents a single unit load to the
RS-485 bus, allowing up to 32 transceivers on the network.
• Operates from a single +5V supply (10% tolerance)
• 1 unit load allows up to 32 devices on the bus
• Low quiescent current . . . . . . . . . . . . . . . . . . . . . . 700µA
• -7V to +12V common-mode input voltage range
The receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high Rx output if the Rx inputs are
floating.
• Three state Rx and Tx outputs
• 30ns propagation delays, 2ns skew
The 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.
• Current limiting and thermal shutdown for driver overload
protection
Applications
The half duplex configuration multiplexes the Rx inputs and
Tx outputs to allow transceivers with Rx and Tx disable
functions in 8 Ld packages.
• SCSI “fast 20” drivers and receivers
Related Literature
• Building environmental control systems
For a full list of related documents, visit our website:
• Industrial/process control networks
• ISL4485E product page
• Level translators
• Data loggers
• Security networks
Typical Operating Circuit
ISL4485E
5V
8
R PU
5V
100nF
V CC
100nF
RB
1 RO
8
R PU
V CC
RO 1
A/Y 6
6 A/Y
2 RE
RE 2
R T2
3 DE
V FS
R T1
B/Z 7
DE 3
7 B/Z
4 DI
DI 4
RB
GND
GND
5
5
To calculate the resistor values, refer to TB509.
FN6049 Rev 4.00
Oct 8, 2018
Page 1 of 13
ISL4485E
Ordering Information
PART NUMBER
(Notes 2, 3)
PART MARKING
TEMP. RANGE (°C)
TAPE AND REEL
(UNITS) (Note 1)
ISL4485EIBZ
4485EIBZ
-40 to +85
-
ISL4485EIBZ-T
4485EIBZ
-40 to +85
2.5k
PACKAGE
(RoHS COMPLIANT)
PKG. DWG. #
8 Ld SOIC (Pb-free)
M8.15
8 Ld SOIC Tape & Reel
(Pb-free)
M8.15
NOTE:
1. Refer to TB347 for details about reel specifications.
2. These 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. 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), refer to the ISL4485E product information page. For more information, refer to TB363.
Truth Tables
RECEIVING
TRANSMITTING
INPUTS
INPUTS
OUTPUTS
OUTPUT
RE
DE
DI
B/Z
A/Y
RE
DE
A-B
RO
X
1
1
0
1
0
0
≥ +0.2V
1
X
1
0
1
0
0
0
≤ -0.2V
0
X
0
X
High-Z
High-Z
0
0
Inputs Open
1
1
X
X
High-Z
Pinout
TOP VIEW
RO 1
R
RE 2
DE 3
DI 4
D
8
VCC
7
B/Z
6
A/Y
5
GND
Pin Descriptions
PIN
FUNCTION
RO
Receiver output: RO is high if A > B by at least 0.2V; RO is low if A < B by 0.2V or more; RO = high if A and B are unconnected (floating).
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, noninverting receiver input and noninverting driver output. Pin is an input (A) if DE = 0; pin is an output (Y)
if DE = 1.
B/Z
±15kV HBM ESD protected, inverting receiver input and inverting driver output. Pin is an input (B) if DE = 0; pin is an output (Z) if
DE = 1.
VCC
System power supply input (4.5V to 5.5V).
FN6049 Rev 4.00
Oct 8, 2018
Page 2 of 13
ISL4485E
Absolute Maximum Ratings
Thermal Information
VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VCC +0.5V)
Input / Output Voltages
A / Y, B / Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +12.5V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to (VCC +0.5V)
Short-Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . See “Electrical Specifications”
Thermal Resistance (Typical, Note 4)
JA (°C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Maximum Junction Temperature (Plastic Package) . . . . . . . . . 150
Maximum Storage Temperature Range . . . . . . . . . . . . -65°C to +150
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . . 300
(Lead Tips Only)
Operating Conditions
Temperature Range
ISL4485EIBZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to 85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” can permanently damage 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:
4. JA is measured with the component mounted on a low-effective thermal conductivity test board in free air. See TB379 for details.
Electrical Specifications
PARAMETER
Test Conditions: VCC = 4.5V to 5.5V; unless otherwise specified.
Typicals are at VCC = 5V, TA = +25°C, Note 5
SYMBOL
TEST CONDITIONS
TEMP
(oC)
MIN
TYP
MAX
UNIT
DC CHARACTERISTICS
Driver Differential VOUT (no load)
VOD1
Driver Differential VOUT (with load)
VOD2
Change in Magnitude of Driver
Differential VOUT for
Complementary Output States
Driver Common-Mode VOUT
Change in Magnitude of Driver
Common-Mode VOUT for
Complementary Output States
Full
-
-
VCC
V
R = 50Ω (RS-422), (Figure 1)
Full
2
3
-
V
R = 27Ω (RS-485), (Figure 1)
Full
1.5
2.3
5
V
VOD
R = 27Ω or 50Ω, (Figure 1)
Full
-
0.01
0.2
V
VOC
R = 27Ω or 50Ω, (Figure 1)
Full
-
-
3
V
VOC
R = 27Ω or 50Ω, (Figure 1)
Full
-
0.01
0.2
V
Logic Input High Voltage
VIH
DE, DI, RE
Full
2
-
-
V
Logic Input Low Voltage
VIL
DE, DI, RE
Full
-
-
0.8
V
Logic Input Current
IIN1
DE, DI, RE
Input Current (A, B), (Note 8)
IIN2
DE = 0V, VCC = 0V or
4.5V to 5.5V
Receiver Differential Threshold
Voltage
VTH
Full
-25
-
25
µA
VIN = 12V
Full
-
-
1
mA
VIN = -7V
Full
-
-
-0.8
mA
-7V ≤ VCM ≤ 12V
Full
-0.2
-
0.2
V
Receiver Input Hysteresis
VTH
VCM = 0V
25
-
70
-
mV
Receiver Output High Voltage
VOH
IO = -4mA, VID = 200mV
Full
3.5
4
-
V
Receiver Output Low Voltage
VOL
IO = -4mA, VID = 200mV
Full
-
0.1
0.4
V
Three-State (High Impedance)
Receiver Output Current
IOZR
0.4V ≤ VO ≤ 2.4V
Full
-
-
1
µA
Receiver Input Resistance
RIN
-7V ≤ VCM ≤ 12V
No-Load Supply Current, (Note 6)
ICC
DI, RE = 0V or VCC
Driver Short-Circuit Current,
VO = High or Low
FN6049 Rev 4.00
Oct 8, 2018
IOSD1
Full
12
25
-
kΩ
DE = VCC
Full
-
700
900
µA
DE = 0V
Full
-
500
565
µA
Full
35
-
250
mA
DE = VCC, -7V ≤ VY or VZ ≤ 12V, (Note 7)
Page 3 of 13
ISL4485E
Electrical Specifications
PARAMETER
Receiver Short-Circuit Current
Test Conditions: VCC = 4.5V to 5.5V; unless otherwise specified.
Typicals are at VCC = 5V, TA = +25°C, Note 5 (Continued)
TEMP
(oC)
MIN
TYP
MAX
UNIT
Full
7
-
85
mA
tPLH, tPHL RDIFF = 54Ω, CL = 100pF, (Figure 2)
Full
15
30
50
ns
tSKEW
RDIFF = 54Ω, CL = 100pF, (Figure 2)
Full
-
1.3
5
ns
tR, tF
RDIFF = 54Ω, CL = 100pF, (Figure 2)
Full
3
11
25
ns
SYMBOL
IOSR
TEST CONDITIONS
0V ≤ VO ≤ VCC
SWITCHING CHARACTERISTICS
Driver Input to Output Delay
Driver Output Skew
Driver Differential Rise or Fall Time
Driver Enable to Output High
tZH
CL = 100pF, SW = GND, (Figure 3)
Full
-
17
30
ns
Driver Enable to Output Low
tZL
CL = 100pF, SW = VCC, (Figure 3)
Full
-
14
30
ns
Driver Disable from Output High
tHZ
CL = 15pF, SW = GND, (Figure 3)
Full
-
19
30
ns
Driver Disable from Output Low
tLZ
CL = 15pF, SW = VCC, (Figure 3)
Full
-
13
30
ns
fMAXD
VOD ≥ 1.5V, (Figure 4, Note 9)
Full
20
-
-
Mbps
Full
20
40
70
ns
Figure 5
Full
-
3
10
ns
tZH
CL = 15pF, SW = GND, (Figure 6)
Full
-
9
25
ns
Receiver Enable to Output Low
tZL
CL = 15pF, SW = VCC, (Figure 6)
Full
-
9
25
ns
Receiver Disable from Output High
tHZ
CL = 15pF, SW = GND, (Figure 6)
Full
-
9
25
ns
Receiver Disable from Output Low
tLZ
CL = 15pF, SW = VCC, (Figure 6)
Full
-
9
25
ns
CL = 15pF, VID ≥ 1.5V (Note 9)
Full
20
-
-
Mbps
Human Body Model
25
-
±15
-
kV
25
-
>±7
-
kV
Driver Maximum Data Rate
Receiver Input to Output Delay
Receiver Skew | tPLH - tPHL |
Receiver Enable to Output High
Receiver Maximum Data Rate
tPLH, tPHL Figure 5
tSKD
fMAXR
ESD PERFORMANCE
RS-485 Pins (A/Y, B/Z)
All Other Pins
NOTE:
5. 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.
6. Supply current specification is valid for loaded drivers when DE = 0V.
7. Applies to peak current. See “Typical Performance Curves” for more information.
8. Devices meeting these limits are denoted as “single unit load (1 UL)” transceivers. The RS-485 standard allows up to 32 unit loads on the bus.
9. Guaranteed by characterization, but not tested.
Test Circuits and Waveforms
VCC
R
DE
DI
Z
VOD
D
Y
R
VOC
FIGURE 1. DRIVER VOD AND VOC
FN6049 Rev 4.00
Oct 8, 2018
Page 4 of 13
ISL4485E
Test Circuits and Waveforms (Continued)
3V
DI
1.5V
1.5V
0V
tPLH
tPHL
VOH
VCC
CL = 100pF
DE
50%
OUT (Y)
50%
VOL
Z
DI
tPHL
RDIFF
D
Y
tPLH
VOH
CL = 100pF
OUT (Z)
SIGNAL
GENERATOR
50%
50%
VOL
90%
DIFF OUT (Y - Z)
+VOD
90%
10%
10%
tR
-VOD
tF
SKEW = |CROSSING PT. OF Y & Z - CROSSING PT. OF Y & Z
FIGURE 2B. MEASUREMENT POINTS
FIGURE 2A. TEST CIRCUIT
FIGURE 2. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
3V
DE
DI
SIGNAL
GENERATOR
Z
500Ω
VCC
D
SW
Y
DE
1.5V
1.5V
0V
GND
tZH
CL
OUTPUT HIGH
tHZ
VOH - 0.5V
OUT (Y, Z)
VOH
2.3V
0V
PARAMETER OUTPUT
RE
DI
SW
CL (pF)
tHZ
Y/Z
X
1/0
GND
15
tLZ
Y/Z
X
0/1
VCC
15
tZH
Y/Z
X
1/0
GND
100
tZL
Y/Z
X
0/1
VCC
100
FIGURE 3A. TEST CIRCUIT
tZL
tLZ
VCC
OUT (Y, Z)
2.3V
OUTPUT LOW
VOL + 0.5V V
OL
FIGURE 3B. MEASUREMENT POINTS
FIGURE 3. DRIVER ENABLE AND DISABLE TIMES
FN6049 Rev 4.00
Oct 8, 2018
Page 5 of 13
ISL4485E
Test Circuits and Waveforms (Continued)
3V
DI
VCC
DE
0V
+
Z
DI
CD = 200pF
60Ω
D
VOD
Y
-
+VOD
DIFF OUT (Y - Z)
-VOD
0V
SIGNAL
GENERATOR
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4A. TEST CIRCUIT
FIGURE 4. DRIVER DATA RATE
3V
RE
15pF
B
+1.5V
R
A
A
1.5V
RO
1.5V
0V
tPLH
tPHL
VCC
SIGNAL
GENERATOR
50%
RO
50%
0V
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5A. TEST CIRCUIT
FIGURE 5. RECEIVER PROPAGATION DELAY
RE
B
R
SIGNAL
GENERATOR
1kΩ
RO
VCC
SW
A
3V
RE
1.5V
1.5V
GND
0V
15pF
tZH
OUTPUT HIGH
VOH - 0.5V
RO
PARAMETER
DE
A
SW
tHZ
0
+1.5V
GND
tLZ
0
-1.5V
VCC
tZH
0
+1.5V
GND
tZL
0
-1.5V
VCC
tHZ
0V
tZL
tLZ
VCC
RO
1.5V
OUTPUT LOW
FIGURE 6A. TEST CIRCUIT
VOH
1.5V
VOL + 0.5V V
OL
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. RECEIVER ENABLE AND DISABLE TIMES
FN6049 Rev 4.00
Oct 8, 2018
Page 6 of 13
ISL4485E
Application Information
RS-485 and RS-422 are differential (balanced) data
transmission standards for use in long haul or noisy
environments. RS-422 is a subset of RS-485, so RS-485
transceivers are also RS-422 compliant. RS-422 is a
point-to-multipoint (multidrop) standard that allows only one
driver and up to 10 receivers on each bus (assuming one unit
load devices). RS-485 is a true multipoint standard that 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.
An important advantage of RS-485 is the extended
Common-Mode Range (CMR). The CMR specifies that the
driver outputs and receiver inputs withstand signals that range
from +12V to -7V. RS-422 and RS-485 are intended for runs as
long as 4000ft, so the wide CMR is necessary to handle
ground potential differences and voltages induced in the cable
by external fields.
Receiver Features
The ISL4485E uses a differential input receiver for maximum
noise immunity and common-mode rejection. Input sensitivity is
200mV, as required by the RS-422 and RS-485 specifications.
Receiver input impedance surpasses the RS-422 specification
of 4kΩ and meets the RS-485 unit load requirement of 12kΩ
minimum.
Receiver inputs function with common-mode voltages as great
as 7V outside the power supplies (+12V and -7V), making
them ideal for long networks in which induced voltages are a
realistic concern.
The receiver includes a “fail-safe if open” function that
guarantees a high level receiver output if the receiver inputs
are unconnected (floating). The output is three-statable using
the active low RE input, and the receiver meets the 20Mbps
data rate.
Driver Features
The RS-485/422 driver is a differential output device that
delivers at least 1.5V across a 54Ω load (RS-485) and at least
2V across a 100Ω load (RS-422). The ISL4485E driver
features low propagation delay skew to maximize bit width and
to minimize EMI, and the outputs are three-statable using the
active high DE input.
The ISL4485E driver outputs are not slew rate limited, so faster
output transition times allow data rates up to 20Mbps.
Data Rate, Cables, and Terminations
Twisted pair cable is the cable of choice for RS-485/422
networks. Twisted pair cables pick up noise and other
electromagnetically induced voltages as common-mode
signals that are effectively rejected by the differential receivers
in these ICs.
FN6049 Rev 4.00
Oct 8, 2018
RS-485/422 are intended for network lengths up to 4000ft, but
the maximum transmission length decreases as the data rate
increases. According to guidelines in the RS-422 specification,
a 20Mbps network should be limited to less than 50ft of
24 AWG twisted pair. However, the ISL4485E's large
differential voltage swing, fast transition times, and high
drive-current output stages allow operation at 20Mbps in
RS-485/422 networks as long as 450ft. Figure 7 on page 8
details ISL4485E operation at 20Mbps driving 300ft of CAT 5
cable terminated in 120Ω at the driver and the receiver (that is,
double terminated). The acceptance criteria for this test was
the ability of the driver to deliver a 1.5V differential signal to the
receiver at the end of the cable (|A-B| ≥ 1.5V). If a more liberal
acceptance criteria is used, the distance can be further
extended. For example, Figure 8 on page 8 illustrates the
performance in the same configuration but with a cable length
of 450ft and an acceptance criteria of no more than 6dB
attenuation across the cable (|A-B| = |Y-Z|/2).
Driver differential output voltage decreases with increasing
differential load capacitance, so maintaining a 1.5V differential
output requires a data rate reduction as shown in Figure 9 on
page 8.
To minimize reflections, proper termination is imperative when
using this 20Mbps device. In point-to-point or
point-to-multipoint (single driver on bus) networks, terminate
the main cable in its characteristic impedance (typically 120Ω)
at the end farthest from the driver. In multi-receiver
applications, keep stubs connecting receivers to the main
cable as short as possible (preferably less than 12in).
Multipoint (multi-driver) systems require that the main cable be
terminated in its characteristic impedance at both ends. Keep
stubs connecting a transceiver to the main cable as short as
possible.
Built-In Driver Overload Protection
The RS-485 specification requires that drivers survive worst
case bus contentions undamaged. The ISL4485E device
meets this requirement with driver output short-circuit current
limits and on-chip thermal shutdown circuitry.
The driver output stages incorporate short-circuit current
limiting circuitry, ensuring that the output current never
exceeds the RS-485 specification even at the common-mode
voltage range extremes. These devices also use a foldback
circuit that reduces the short-circuit current (and the power
dissipation) when the contending voltage exceeds either
supply.
In the event of a major short-circuit condition, this device’s
thermal shutdown feature 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
condition persists, the thermal shutdown/reenable cycle
repeats until the fault is cleared. Receivers stay operational
during thermal shutdown.
Page 7 of 13
ISL4485E
ESD Protection
All pins on these interface devices include class 3 Human
Body Model (HBM) ESD protection structures, but the RS-485
pins (driver outputs and receiver inputs) incorporate advanced
structures allowing them to survive ESD events in excess of
15kV HBM. The RS-485 pins are particularly vulnerable to
ESD damage because they typically connect to an exposed
port on the exterior of the finished product. Simply touching the
port pins or connecting a cable can cause an ESD event that
destroys unprotected ICs. The ISL4485E ESD structures
protect the device whether or not it is powered up, protect
without allowing any latchup mechanism to activate, and
without degrading the RS-485 CMR of -7V to +12V. This
built-in ESD protection eliminates the need for board level
(~450ns)
1.5
0
A-B
-1.5
-3
DI
5
0
5
RO
0
DRIVER+CABLE DELAY
3
DRIVER INPUT (V)
RO
DRIVER+CABLE DELAY
The RS-485 pin survivability on this high ESD device has been
characterized to be in excess of 15kV, for discharges to GND.
RECEIVER OUTPUT (V)
5
DRIVER INPUT (V)
5
0
3
This test method emulates the ESD event delivered to an IC
during human handling. The tester delivers the charge stored
on a 100pF capacitor through a 1.5kΩ current limiting resistor
into the pin under test. The HBM method determines an IC’s
ability to withstand the ESD events typically present during
handling and manufacturing.
VCC = 5V, TA = 25oC, Unless Otherwise Specified
DI
0
Human Body Model Testing
RECEIVER INPUT (V)
RECEIVER INPUT (V)
RECEIVER OUTPUT (V)
Typical Performance Curves
protection structures (for example, transient suppression
diodes) and the associated undesirable capacitive load that
they cause.
(~650ns)
1.5
0
A-B
-1.5
-3
TIME (20ns/DIV)
TIME (20ns/DIV)
FIGURE 7. DRIVER AND RECEIVER WAVEFORMS DRIVING
300FT OF CABLE (DOUBLE TERMINATED)
FIGURE 8. DRIVER AND RECEIVER WAVEFORMS DRIVING
450FT OF CABLE (DOUBLE TERMINATED)
750
30
RDIFF = 54Ω
700
25
20
ICC (A)
DATA RATE (Mbps)
DE = VCC, RE = X
650
15
600
550
10
500
DE = GND, RE = X
5
450
0
500 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
DIFFERENTIAL CAPACITANCE (pF)
FIGURE 9. DATA RATE vs DIFFERENTIAL CAPACITANCE
FN6049 Rev 4.00
Oct 8, 2018
400
-40
-25
0
25
50
75
TEMPERATURE (°C)
FIGURE 10. SUPPLY CURRENT vs TEMPERATURE
Page 8 of 13
85
ISL4485E
(Continued) VCC = 5V, TA = 25oC, Unless Otherwise Specified
90
3.6
80
3.4
DIFFERENTIAL OUTPUT VOLTAGE (V)
DRIVER OUTPUT CURRENT (mA)
Typical Performance Curves
70
60
50
40
30
20
10
0
0
1
2
3
4
3.2
RDIFF = 100Ω
3
2.8
2.6
2.4
RDIFF = 54Ω
2.2
2
-40
5
-25
DIFFERENTIAL OUTPUT VOLTAGE (V)
25
50
75
85
TEMPERATURE (°C)
FIGURE 11. DRIVER OUTPUT CURRENT vs DIFFERENTIAL
OUTPUT VOLTAGE
FIGURE 12. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
40
3
35
2.5
tPHLY - tPLHZ
tPHLY
30
tPHLZ
tPLHZ
SKEW (ns)
PROPAGATION DELAY (ns)
0
tPLHY
25
tPLHY - tPHLZ
2
1.5
CROSSING PT. OF Y & Z - CROSSING PT. OF Y & Z
25
-40
-25
0
25
50
TEMPERATURE (°C)
FIGURE 13. DRIVER PROPAGATION DELAY vs
TEMPERATURE
FN6049 Rev 4.00
Oct 8, 2018
75
85
1
-40
-25
0
25
50
75
TEMPERATURE (°C)
FIGURE 14. DRIVER SKEW vs TEMPERATURE
Page 9 of 13
85
ISL4485E
DI
0
5
RO
0
4
3
2
B/Z
A/Y
1
0
RDIFF = 54Ω, CL = 100pF
DI
5
0
RO
0
4
3
A/Y
2
B/Z
1
0
TIME (10ns/DIV)
TIME (10ns/DIV)
FIGURE 15. DRIVER AND RECEIVER WAVEFORMS,
LOW TO HIGH
FIGURE 16. DRIVER AND RECEIVER WAVEFORMS,
HIGH TO LOW
160
140
120
Y OR Z = LOW
OUTPUT CURRENT (mA)
100
80
60
40
20
0
-20
Y OR Z = HIGH
-40
-60
-80
-100
-120
-7 -6
-4
-2
0
2
4
6
OUTPUT VOLTAGE (V)
8
10
12
FIGURE 17. DRIVER OUTPUT CURRENT vs SHORT-CIRCUIT VOLTAGE
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
TRANSISTOR COUNT:
518
PROCESS:
Si Gate CMOS
FN6049 Rev 4.00
Oct 8, 2018
5
Page 10 of 13
DRIVER INPUT (V)
5
RECEIVER OUTPUT (V)
RDIFF = 54Ω, CL = 100pF
DRIVER INPUT (V)
(Continued) VCC = 5V, TA = 25oC, Unless Otherwise Specified
DRIVER OUTPUT (V)
DRIVER OUTPUT (V)
RECEIVER OUTPUT (V)
Typical Performance Curves
ISL4485E
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted.
Please visit our website to make sure you have the latest revision.
DATE
REVISION
CHANGE
Oct 8, 2018
FN6049.4
Updated typical operating circuit on page 1.
Added Related Literature section to page 1.
Removed ISL4485EIB and ISL4485EIB-T from ordering information table on page 2.
Added Tape and Reel column and Notes 1, 2, and 3 to ordering information table on page 2.
Removed Intersil copyright information and added Renesas disclaimer.
Added Revision History to page 11.
Updated package outline drawing from revision 0 to revision 4. Changes between revisions:
-Revision 1: Initial revision
-Revision 1 to revision 2: Updated to new package outline drawing format by removing table, moving
dimensions onto drawing, and adding land pattern
-Revision 2 to revision 3: Changed the following values in Typical Recommended Landing Pattern:
2.41(0.095) to 2.20 (0.087)
0.76(0.030) to 0.60(0.023)
0.200 to 5.20(0.205)
-Revision 3 to revision 4: Changed text in Note 1 from “1982” to “1994”
FN6049 Rev 4.00
Oct 8, 2018
Page 11 of 13
ISL4485E
Package Outline Drawing
M8.15
For the most recent package outline drawing, see 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:
10. Dimensioning and tolerancing per ANSI Y14.5M-1994.
11. 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.
12. Package width does not include interlead flash or protrusions. Interlead
flash and protrusions shall not exceed 0.25mm (0.010 inch) per side.
13. The chamfer on the body is optional. If it is not present, a visual index
feature must be located within the crosshatched area.
14. Terminal numbers are shown for reference only.
15. 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).
16. Controlling dimension: MILLIMETER. Converted inch dimensions are not
necessarily exact.
17. This outline conforms to JEDEC publication MS-012-AA ISSUE C.
FN6049 Rev 4.00
Oct 8, 2018
Page 12 of 13
Notice
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