ISL3295EIHZ-T [RENESAS]
±16.5kV ESD Protected, SOT-23, 20Mbps, RS-485/RS-422 Transmitter; SOT6; Temp Range: See Datasheet;
| 型号： | ISL3295EIHZ-T |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | ±16.5kV ESD Protected, SOT-23, 20Mbps, RS-485/RS-422 Transmitter; SOT6; Temp Range: See Datasheet 驱动 信息通信管理 光电二极管 接口集成电路 驱动器 |
| 文件： | 总17页 (文件大小：929K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATASHEET
ISL3295E, ISL3298E
±16.5kV ESD Protected, +125°C, 3.0V to 5.5V, SOT-23/TDFN Packaged, Low
Power, RS-485/RS-422 Transmitters
FN6544
Rev.4.00
Oct 9, 2019
The ISL3295E and ISL3298E are ±16.5kV HBM ESD Protected
Features
(7kV IEC61000 contact), 3.0V to 5.5V powered, single
• High ESD protection on RS-485 outputs . . . . ±16.5kV HBM
- IEC61000-4-2 contact test method . . . . . . . . . . . . . . . ±7kV
- Class 3 ESD level on all other pins. . . . . . . . . . . .>8kV HBM
transmitters for balanced communication using the RS-485
and RS-422 standards. These drivers have very low output
leakage current (±40µA), so they present less than a “1/8 unit
load” to the RS-485 bus. This allows more than 256
transmitters on the network without violating the RS-485
specification’s 32 unit load maximum, and without using
repeaters.
• Specified for +125°C operation (V ≤ 3.6V only)
CC
• Logic supply pin (V ) eases operation in mixed supply
L
systems (ISL3298E only)
Hot Plug circuitry ensures that the Tx outputs remain in a high
impedance state while the power supply stabilizes.
• Hot plug - Tx outputs remain three-state during power-up
• Low Tx leakage allows >256 devices on the bus
• High data rates. . . . . . . . . . . . . . . . . . . . . . . . . . up to 20Mbps
Drivers on the ISL3295E and ISL3298E are not limited, so they
can achieve the 20Mbps data rate. They are offered in industrial
and extended industrial (-40°C to +125°C) temperature
ranges.
• Low quiescent supply current. . . . . . . . . . . . . . . 150µA (max)
- Very low shutdown supply current . . . . . . . . . . . 1µA (max)
• -7V to +12V common-mode output voltage range
A 26% smaller footprint is available with the ISL3298E TDFN
(V ≤ 3.6V only)
CC
package. This device also features a logic supply pin (V ) that
L
sets the switching points of the DE and DI inputs to be
compatible with a lower supply voltage in mixed voltage
systems.
• Current limiting and thermal shutdown for driver overload
protection (V ≤ 3.6V only)
CC
• Tri-statable Tx outputs
For companion single RS-485 receivers in micro packages,
please see the ISL3280E, ISL3281E, ISL3282E, ISL3283E,
ISL3284E datasheet.
• 5V tolerant logic inputs when V ≤5V
CC
• Pb-free (RoHS compliant)
Related Literature
For a full list of related documents, visit our website
Applications
• Clock distribution
• ISL3295E and ISL3298E device pages
• High node count systems
• Space constrained systems
• Security camera networks
• Building environmental control/lighting systems
• Industrial/process control networks
TABLE 1. SUMMARY OF FEATURES
DATA
TX
MAXIMUM
RATE SLEW RATE HOT
V
ENABLE? QUIESCENT LOW POWER
PIN
L
PART NUMBER
FUNCTION (Mbps) LIMITED? PLUG? PIN? (Note 11)
I
(µA)
SHUTDOWN?
YES
COUNT
CC
150
150
ISL3295E
ISL3298E
1 Tx
1 Tx
20
20
NO
NO
YES
NO
YES
YES
6 Ld SOT
YES YES
YES
8 Ld TDFN
FN6544 Rev.4.00
Oct 9, 2019
Page 1 of 17
ISL3295E, ISL3298E
Pin Configurations
ISL3295E
(6 LD SOT-23)
TOP VIEW
ISL3298E
(8 LD TDFN)
TOP VIEW
DI
1
2
3
6
5
4
Y
V
V
Z
Y
1
2
3
4
8
7
6
5
L
CC
V
D
GND
Z
CC
DE
DI
DE
D
GND
GND
NOTE: BOTH GND PINS MUST BE CONNECTED
Truth Tables
Pin Descriptions
TRANSMITTING
PIN
NAME
FUNCTION
INPUTS
OUTPUTS
DE
Driver output enable. The driver outputs, Y and Z, are enabled by
bringing DE high, and are high impedance when DE is low. If the
DE (Note 11)
DI
Z
0
1
Y
driver enable function isn’t needed, connect DE to V (or V )
1
1
0
X
1
0
CC
L
through a 1kΩ to 3kΩ resistor.
1
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.
0
High-Z *
High-Z *
NOTE: *Shutdown Mode
GND Ground connection. This is also the potential of the TDFN
thermal pad.
Y
±15kV HBM, ±7kV IEC61000 (contact method) ESD Protected
RS-485/422 level, noninverting transmitter output.
Z
±15kV HBM, ±7kV IEC61000 (contact method) ESD Protected
RS-485/422 level, inverting transmitter output.
V
System power supply input (3.0V to 5.5V). On devices with a V
L
CC
pin powered from a separate supply, power-up V first.
CC
V
Logic-level supply which sets the V /V levels for the DI and DE
IL IH
L
pins (ISL3298E only). If V and V are different supplies,
L
CC
power-up this supply after V , and keep V ≤ V
.
CC CC
L
FN6544 Rev.4.00
Oct 9, 2019
Page 2 of 17
ISL3295E, ISL3298E
Ordering Information
PART NUMBER
(Notes 1, 3)
PART MARKING
TEMP. RANGE
(°C)
TAPE AND REEL
(UNITS) (Note 2)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
(Note 4)
ISL3295EFHZ-T
295F
-40 to +125
-40 to +125
-40 to +85
-40 to +85
-40 to +125
3k
250
3k
6 Ld SOT-23
P6.064
P6.064
P6.064
P6.064
L8.2x3A
ISL3295EFHZ-T7A
ISL3295EIHZ-T
ISL3295EIHZ-T7A
ISL3298EFRTZ-T
NOTES:
295F
295I
295I
98F
6 Ld SOT-23
6 Ld SOT-23
6 Ld SOT-23
8 Ld TDFN
250
6k
1. These 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). 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.
2. See TB347 for details about reel specifications.
3. For Moisture Sensitivity Level (MSL), see the ISL3295E and ISL3298E device pages. For more information about MSL, see TB363.
4. SOT-23 “PART MARKING” is branded on the bottom side.
FN6544 Rev.4.00
Oct 9, 2019
Page 3 of 17
ISL3295E, ISL3298E
Typical Operating Circuits
+3.3V TO 5V
+3.3V
2
+
+
0.1µF
0.1µF
1
V
V
CC
CC
ISL3281E
ISL329xE
R
6
4
T
6
4
Y
Z
A
B
RO
RE
3
5
1
3
DI
R
D
DE
GND
2
GND
5
FIGURE 1. NETWORK WITH ENABLES
+3.3V TO 5V
1
+3.3V
1kΩ TO 3kΩ
Note 10
+
+
0.1µF
0.1µF
2
3
V
V
CC
CC
ISL3280E
ISL329xE
DE
R
6
Y
Z
5
4
T
A
RO
3
1
DI
R
4
B
D
GND
2
GND
5
FIGURE 2. NETWORK WITHOUT ENABLE
2.5V +3.3V TO 5V
+3.3V
8
1.8V
1
+
+
0.1µF
0.1µF
4
6
V
V
V
V
L
CC
L
CC
V
V
CC
CC
ISL3282E
R
ISL3298E
D
LOGIC
DEVICE
(µP, ASIC,
UART)
LOGIC
R
DEVICE
(µP, ASIC,
UART)
5
8
T
6
7
Y
A
B
RO
RE
1
7
3
2
DI
Z
DE
GND
2
GND
4, 5
NOTE: IF POWERED FROM SEPARATE SUPPLIES,
POWER-UP V BEFORE V
CC
L
FIGURE 3. NETWORK WITH VL PIN FOR INTERFACING TO LOWER VOLTAGE LOGIC DEVICES
FN6544 Rev.4.00
Oct 9, 2019
Page 4 of 17
ISL3295E, ISL3298E
Absolute Maximum Ratings
Thermal Information
V
V
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
Thermal Resistance (Typical)
6 Ld SOT-23 Package (Note 5) . . . . . . . . . .
8 Ld TDFN Package (Notes 6, 7). . . . . . . . .
θJA (°C/W) θJC (°C/W)
CC
to GND (ISL3298E Only) . . . . . . . . . . . . . . . . . . . . . -0.3V to (V + 0.3V)
177
65
N/A
8
L
CC
Input Voltages
DI, DE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
Output Voltages
Maximum Junction Temperature (Plastic Package) . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
Y, Z (V ≤ 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +13V
CC
Y, Z (V > 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to V +0.5V
CC
CC
Short-circuit Duration
Operating Conditions
Y, Z (V ≤ 3.6V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
CC
Y, Z (V > 3.6V, (Note 13). . . . . . . . . . . . . . . . . . . . . . . . . 1s at <300mA
Temperature Range
CC
ESD Rating . . . . . . . . . . . . . . . . . . See Electrical Specifications on page 6
F Suffix (V ≤ 3.6V only). . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +125°C
CC
I Suffix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions can adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
5. θ is measured with the component mounted on a high-effective thermal conductivity test board in free air. See TB379 for details.
JA
6. θ is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See TB379.
JA
7. For θ , the “case temp” location is the center of the exposed metal pad on the package underside.
JC
Electrical Specifications Test Conditions: V = 3.0V to 5.5V, V = V (ISL3298E only), typicals are at T = +25°C, unless otherwise
CC
L
CC
A
specified. (Note 8)
TEMP
(°C)
MIN
(Note 12)
TYP
(Note 14)
MAX
(Note 12)
PARAMETER
DC CHARACTERISTICS
Driver Differential V
SYMBOL
TEST CONDITIONS
UNIT
V
R
= 100Ω (RS-422)
V
V
V
V
≥ 3.15V
≥ 4.5V
≥ 3.0V
≥ 4.5V
Full
Full
Full
Full
Full
Full
Full
2
3
2.3
3.8
2
-
-
V
V
V
V
OUT
OD
L
CC
CC
CC
CC
(Figure 4A)
R
= 54Ω (RS-485)
1.5
2.5
-
V
V
V
L
CC
(Figure 4A)
3.4
-
CC
No load
CC
-
R
R
= 60Ω, -7V ≤ V ≤ 12V (Figure 4B)
1.5
-
2, 3.4
0.01
V
V
L
L
CM
Change in Magnitude of Driver
Differential V for
ΔV
= 54Ω or 100Ω (Figure 4A)
0.2
OD
OUT
Complementary Output States
Driver Common-mode V
OUT
V
R
= 54Ω or 100Ω
V
V
≤ 3.6V
≤ 5.5V
Full
Full
Full
-
-
-
2
-
3
V
V
V
OC
L
CC
(Figure 4A)
3.2
0.2
CC
Change in Magnitude of Driver
Common-mode V for
ΔV
R
= 54Ω or 100Ω (Figure 4A)
0.01
OC
L
L
OUT
Complementary Output States
Input High Voltage (DI, DE)
V
V
V
V
V
V
V
= V if ISL3298E
CC
V
V
≤ 3.6V
≤ 5.5V
Full
Full
Full
Full
Full
25
2.2
3
-
-
-
-
-
-
-
-
-
-
-
V
V
V
V
V
V
IH1
IH2
IH3
IH4
IH5
IH6
CC
CC
2.7V ≤ V < 3.0V (ISL3298E only)
2
L
2.3V ≤ V < 2.7V (ISL3298E only)
1.65
L
1.6V ≤ V < 2.3V (ISL3298E only)
0.7*V
-
L
L
1.35V ≤ V < 1.6V (ISL3298E only)
0.5*V
L
L
FN6544 Rev.4.00
Oct 9, 2019
Page 5 of 17
ISL3295E, ISL3298E
Electrical Specifications Test Conditions: V = 3.0V to 5.5V, V = V (ISL3298E only), typicals are at T = +25°C, unless otherwise
CC
L
CC
A
specified. (Note 8) (Continued)
TEMP
(°C)
MIN
(Note 12)
TYP
(Note 14)
MAX
(Note 12)
PARAMETER
SYMBOL
TEST CONDITIONS
UNIT
V
Input Low Voltage (DI, DE)
V
V
V
V
V
V
V
= V if ISL3298E
Full
Full
Full
Full
25
-
-
-
-
-
0.8
0.8
IL1
IL2
IL3
IL4
IL5
L
L
CC
≥ 2.7V (ISL3298E only)
-
V
2.3V ≤ V < 2.7V (ISL3298E only)
-
0.65
V
L
1.6V ≤ V < 2.3V (ISL3298E only)
-
0.22*V
V
L
L
1.35V ≤ V < 1.6V (ISL3298E only)
-
0.3*V
-
V
L
L
Logic Input Current
I
DI = DE = 0V or V (Note 11)
CC
Full
Full
Full
Full
-2
-
0.1
-10
-
2
µA
µA
µA
mA
mA
°C
IN
Output Leakage Current
(Y, Z, Note 11)
I
DE = 0V,
= 0V, 3.6V, or 5.5V
V
V
= 12V
= -7V
-
40
OZ
IN
IN
V
CC
-40
-
Driver Short-circuit Current,
I
DE = V , -7V ≤ V ≤ 12V, V ≤ 3.6V
CC CC
-
-
-
±250
±450
-
OSD1
O
V
= High or Low (Note 9)
O
DE = V , 0V ≤ V ≤ V , V > 3.6V (Note 13) Full
-
CC
O
CC CC
Thermal Shutdown Threshold
SUPPLY CURRENT
T
Full
160
SD
No-load Supply Current
Shutdown Supply Current
ESD PERFORMANCE
RS-485 Pins (Y, Z)
I
DI = 0V or V
DE = V
CC
Full
Full
-
-
120
150
1
µA
µA
CC
CC
I
DE = 0V, DI = 0V or V
CC
0.01
SHDN
Human Body Model, from bus pins to GND
IEC61000 Contact, from bus pins to GND
HBM, per MIL-STD-883 Method 3015
Machine Model
25
25
25
25
-
-
-
-
±16.5
±7
-
-
-
-
kV
kV
kV
V
All Pins
±8
±400
DRIVER SWITCHING CHARACTERISTICS
Maximum Data Rate
f
V
= ±1.5V, C = 360pF (Figure 7)
Full
Full
25
20
-
29, 23
32
36
40
-
-
Mbps
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MAX
OD
D
Driver Single-ended Output
Delay
t
R
C
= 54Ω,
V
V
V
V
= V
CC
15
42
SD
DIFF
= 50pF (Figure 5)
L
L
L
L
D
≥ 1.8V
= 1.5V
= 1.35V
-
-
-
-
-
-
-
-
-
-
-
-
-
25
-
25
-
Part-to-part Output Delay Skew
t
R
R
= 54Ω, C = 50pF (Figure 5, Note 10)
Full
Full
25
25
SKPP
DIFF
DIFF
D
Driver Single-ended Output
Skew
t
= 54Ω,
V
V
V
V
V
V
V
V
= V
CC
3
7
SSK
L
L
L
L
L
L
L
L
C
= 50pF (Figure 5)
D
≥ 1.8V
= 1.5V
= 1.35V
3
-
25
4
-
25
5
-
Driver Differential Output Delay
t
R
C
= 54Ω,
= V
CC
Full
25
29, 22
32
36
42
42
DD
DIFF
= 50pF (Figure 5)
D
≥ 1.8V
= 1.5V
= 1.35V
-
-
-
25
25
FN6544 Rev.4.00
Oct 9, 2019
Page 6 of 17
ISL3295E, ISL3298E
Electrical Specifications Test Conditions: V = 3.0V to 5.5V, V = V (ISL3298E only), typicals are at T = +25°C, unless otherwise
CC
L
CC
A
specified. (Note 8) (Continued)
TEMP
(°C)
MIN
(Note 12)
TYP
(Note 14)
MAX
(Note 12)
PARAMETER
SYMBOL
TEST CONDITIONS
UNIT
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Driver Differential Output Skew
t
R
= 54Ω,
V
V
V
V
V
V
V
= V ≤ 3.6V
CC
Full
25
-
-
-
-
-
-
-
-
-
-
-
0.5
2
3
DSK
DIFF
= 50pF (Figure 5)
L
L
L
L
L
L
L
C
D
= V = 5V
CC
-
≥ 1.8V
≥ 1.5V
= 1.35V
25
0.5, 1
1, 2
-
-
25
25
2, 4
-
Driver Differential Rise or Fall
Time
t , t
R
= 54Ω,
= V
CC
Full
25
9
15
-
R
F
DIFF
= 50pF (Figure 5)
C
D
≥ 1.35V
9
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output High
Driver Disable from Output Low
NOTES:
t
R
R
R
R
= 500Ω, C = 50pF, SW = GND (Figure 6)
Full
Full
Full
Full
100, 60
60, 35
30, 22
25, 20
250
250
60
60
ZH
L
L
L
L
L
t
= 500Ω, C = 50pF, SW = V (Figure 6)
CC
ZL
L
t
= 500Ω C = 50pF, SW = GND (Figure 6)
L
HZ
t
= 500Ω, C = 50pF, SW = V (Figure 6)
CC
LZ
L
8. 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.
9. Applies to peak current. See “Typical Performance Curves” on page 11 for more information.
10. t
is the magnitude of the difference in propagation delays of the specified terminals of two units tested with identical test conditions (such as
SKPP
, temperature).
V
CC
11. If the driver enable function is not needed, connect DE to V (or V ) through a 1kΩ to 3kΩ resistor.
CC
12. Parts are 100% tested at +25°C. Over-temperature limits established by characterization and are not production tested.
13. Due to the high short-circuit current at V > 3.6V, the outputs must not be shorted outside the range of GND to V or damage may occur. To prevent
L
C
C
C
C
excessive power dissipation that may damage the output, the short-circuit current should be limited to ≤300mA during testing. It is best to use an
external resistor for this purpose, because the current limiting on the V supply may respond too slowly to protect the output.
O
14. Typicals are measured at V = 3.3V for parameters specified with 3V ≤ V ≤ 3.6V, and are measured at V = 5V for parameters specified with
CC CC CC
4.5V ≤ V ≤ 5.5V. If V isn’t specified, then a single “TYP” entry applies to both V = 3.3V and 5V, and two entries separated by a comma refer to
CC CC CC
V
= 3.3V and 5V, respectively.
CC
Test Circuits and Waveforms
R /2
L
375Ω
DE
DI
DE
DI
V
OR V
V
OR V
CC
L
CC L
Z
Y
Z
Y
V
CM
R
= 60Ω
V
V
OD
L
D
D
OD
-7V TO +12V
375Ω
V
R /2
L
OC
FIGURE 4B. V WITH COMMON-MODE LOAD
OD
FIGURE 4A. V AND V
OD OC
FIGURE 4. DC DRIVER TEST CIRCUITS
FN6544 Rev.4.00
Oct 9, 2019
Page 7 of 17
ISL3295E, ISL3298E
Test Circuits and Waveforms(Continued)
3V OR V
0V
L
DI
50%
SD1
50%
SD2
DE
t
t
V
OR V
L
CC
V
OH
OUT (Z)
OUT (Y)
Z
Y
DI
50%
50%
R
CD
DIFF
D
V
OL
t
t
DDLH
DDHL
SIGNAL
GENERATOR
+V
OD
90%
50%
10%
90%
50%
10%
DIFF OUT (Y - Z)
-V
OD
t
t
R
F
t
= |t
- t
SD1(Y) SD2(Y)
| OR |t
- t
SD1(Z) SD2(Z)
|
t
= |t
DSK
- t |
DDLH DDHL
SSK
FIGURE 5A. TEST CIRCUIT
FIGURE 5. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
FIGURE 5B. MEASUREMENT POINTS
DE
DI
3V OR V
Z
Y
L
500Ω
V
CC
DE
50%
50%
HZ
D
GND
SW
SIGNAL
GENERATOR
0V
50pF
t
ZH
t
OUTPUT HIGH
50%
V
OH
V
- 0.25V
OH
OUT (Y, Z)
OUT (Y, Z)
0V
PARAMETER
OUTPUT
Y/Z
DI
SW
GND
t
1/0
0/1
1/0
0/1
HZ
t
ZL
t
LZ
t
Y/Z
V
CC
GND
LZ
V
CC
OL
t
Y/Z
ZH
50%
t
Y/Z
V
V
+ 0.25V
V
ZL
CC
OL
OUTPUT LOW
FIGURE 6A. TEST CIRCUIT
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. DRIVER ENABLE AND DISABLE TIMES
DE
DI
V
OR V
L
3V OR V
0V
CC
+
L
Z
DI
V
C
54Ω
D
OD
-
D
Y
SIGNAL
GENERATOR
+V
OD
DIFF OUT (Y - Z)
0V
-V
OD
FIGURE 7B. MEASUREMENT POINTS
FIGURE 7A. TEST CIRCUIT
FIGURE 7. DRIVER DATA RATE
FN6544 Rev.4.00
Oct 9, 2019
Page 8 of 17
ISL3295E, ISL3298E
powered DI or DE input. Connecting the V pin to the power
L
Application Information
supply of the logic device (as shown in Figure 8) reduces the DI
and DE input switching points to values compatible with the logic
device’s output levels. Tailoring the logic pin input switching
points and output levels to the supply voltage of the UART, ASIC,
or µcontroller eliminates the need for a level shifter/translator
between the two ICs.
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
transmitters and receivers are also RS-422 compliant. 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. 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.
V
= +3.3V
V
= +2V
CC
CC
V
V
≥ 2V
IH
IH
T
XD
DI
V
≤ 2V
≤ 2V
OH
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. 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.
≥ 2V
DEN
DE
V
OH
GND
GND
ISL3295E
= +3.3V
UART/PROCESSOR
= +2V
Driver Features
V
V
CC
CC
These RS-485/RS-422 drivers are differential output devices that
delivers at least 1.5V across a 54Ω load (RS-485) and at least 2V
across a 100Ω load (RS-422). The drivers feature low
propagation delay skew to maximize bit width and to minimize
EMI.
V
L
V
= 1.4V
T
IH
XD
DI
V
≤ 2V
≤ 2V
OH
All drivers are tri-statable via the active high DE input. If the Tx
V
= 1.4V
IH
enable function is not needed, tie DE to V (or V ) through a 1kΩ
DEN
DE
CC
L
V
OH
to 3kΩ resistor.
GND
GND
The outputs of the ISL3295E and ISL3298E drivers are not slew
rate limited, so faster output transition times allow data rates of
at least 20Mbps.
ISL3298E
UART/PROCESSOR
FIGURE 8. USING V PIN TO ADJUST LOGIC LEVELS
L
Wide Supply Range
The ISL3295E and ISL3298E are optimized for 3.3V operation,
but can be operated with supply voltages as high as 5.5V. These
devices meet the RS-422 and RS-485 specifications for supply
voltages less than 4V, and are RS-422 and RS-485 compatible
for supplies greater than 4V. Operation at +125°C requires
V can be anywhere from V down to 1.35V, but the input
CC
L
switching points may not provide enough noise margin and
20Mbps data rates may not be achievable, when V < 1.5V.
L
Table 2 indicates typical V and V values for various V settings
IH IL
L
so you can ascertain whether or not a particular V voltage meets
L
V
≤ 3.6V, while 5V operation requires adding output current
CC
his needs.
limiting resistors (as described in the “Driver Overload
Protection” on page 10) if output short-circuits (for example,
from bus contention) are a possibility.
TABLE 2. V AND V vs V FOR V = 3.3V OR 5V
IH
IL
L
CC
V
(V)
V
(V)
V (V)
IL
L
IH
1.35
1.5
0.7
0.8
0.9
1.1
1.3
1.5
2.7
0.4
0.5
0.7
1.0
1.1
1.4
2.3
5.5V Tolerant Logic Pins
Logic input pins (DI, DE) contain no ESD nor parasitic diodes to
1.8
V
(nor to V ), so they withstand input voltages exceeding 5.5V
CC
regardless of the V and V voltages.
L
2.3
CC
L
2.7
Logic Supply (V Pin, ISL3298E)
L
3.3
Note: If powered from separate supplies, power-up V before
CC
5.0 (i.e., V
)
CC
powering up the V supply and keep V ≤ V
.
L
L
CC
The V supply current (I ) is typically much less than 20µA, as
shown in Figure 12 on page 11, when DE and DI are
The ISL3298E includes a V pin that powers the logic inputs (DI
L
L
L
and DE). This pin interfaces with “logic” devices such as UARTs,
ASICs, and µcontrollers, and today most of these devices use
power supplies significantly lower than 3.3V. Thus, the logic
above/below V /V .
IH IL
device’s low V might not exceed the V of a 3.3V or 5V
OH
IH
FN6544 Rev.4.00
Oct 9, 2019
Page 9 of 17
ISL3295E, ISL3298E
Hot Plug Function
Driver Overload Protection
When a piece of equipment powers up, there is a period of time
where the processor or ASIC driving the RS-485 control line (DE)
is unable to ensure that the RS-485 Tx outputs are kept disabled.
If the equipment is connected to the bus, a driver activating
prematurely during power-up can crash the bus. To avoid this
scenario, the ISL329xE family incorporates a “Hot Plug” function.
As stated previously, the RS-485 specification requires that
drivers survive worst case bus contentions undamaged. These
drivers meet this requirement, for V ≤ 3.6V, via driver output
CC
short-circuit current limits and on-chip thermal shutdown
circuitry.
The driver output stages incorporate short-circuit current limiting
circuitry, which ensures that the output current never exceeds the
During power-up, circuitry monitoring V ensures that the Tx
CC
outputs remain disabled for a period of time, regardless of the state
of DE. This gives the processor/ASIC a chance to stabilize and drive
the RS-485 control lines to the proper states.
RS-485 specification, for V ≤ 3.6V, even at the common-mode
CC
voltage range extremes. Additionally, these devices utilize a
foldback circuit which reduces the short-circuit current and thus
the power dissipation, whenever the contending voltage exceeds
ESD Protection
either V or GND.
CC
All pins on these devices include class 3 (8kV) Human Body
Model (HBM) ESD protection structures, but the RS-485 pins
(driver outputs) incorporate advanced structures allowing them
to survive ESD events in excess of ±16.5kV HBM and ±7kV to
the IEC61000 contact test method. 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 might destroy unprotected ICs.
These new ESD structures protect the device whether or not it is
powered up and without degrading the RS-485 common-mode
range of -7V to +12V. This built-in ESD protection eliminates the
need for board level protection structures (such as transient
suppression diodes) and the associated, undesirable capacitive
load they present.
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 +20°C. If the
contention persists, the thermal shutdown/reenable cycle repeats
until the fault is cleared.
At V > 3.6V, the instantaneous short-circuit current is high
CC
enough that output stage damage can occur during short-circuit
conditions to voltages outside of GND to V , before the
CC
short-circuit limiting and thermal shutdown activate. For
V
= 5V operation, if output short-circuits are a possibility (for
CC
example, due to bus contention), it is recommended that a 5Ω
resistor be inserted in series with each output. This resistor limits
the instantaneous current below levels that can cause damage.
Data Rate, Cables and Terminations
The driver V at V = 5V is so large that this small added
resistance has little impact.
OD CC
The length of RS-485/RS-422 networks operating at 20Mbps is
limited to less than 100'. 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.
High Temperature Operation
Due to power dissipation and instantaneous output short-circuit
current levels at V = 5V, these transmitters may not be
CC
operated at +125°C with V > 3.6V.
CC
Proper termination is imperative to minimize reflections. In
point-to-point, or point-to-multipoint (single driver on bus)
networks, the main cable should be terminated in its
characteristic impedance (typically 120Ω) at the end farthest
from the driver. In multireceiver applications, stubs connecting
receivers to the main cable should be kept as short as possible.
Multipoint (multidriver) systems require that the main cable be
terminated in its characteristic impedance at both ends. Stubs
connecting a transmitter or receiver to the main cable should be
kept as short as possible.
At V = 3.6V, even the SOT-23 versions may be operated at
CC
+125°C, while driving a 100’, double terminated, CAT 5 cable at
20Mbps, without triggering the thermal SHDN circuit.
Low Power Shutdown Mode
These BiCMOS transmitters all use a fraction of the power
required by their bipolar counterparts, but they also include a
shutdown feature that reduces the already low quiescent I to a
CC
1µA trickle. These devices enter shutdown whenever the driver
disables (DE = GND).
FN6544 Rev.4.00
Oct 9, 2019
Page 10 of 17
ISL3295E, ISL3298E
Typical Performance Curves
V
= V = 3.3V, T = +25°C, unless otherwise specified.
CC
L
A
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
240
220
200
180
160
140
120
100
80
60
40
20
0
R
= 100Ω
DIFF
VCC = 5V
R
= 54Ω
DIFF
VCC = 3.3V
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
-40
10
60
TEMPERATURE (°C)
110 125
-15
35
85
DIFFERENTIAL OUTPUT VOLTAGE (V)
FIGURE 9. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT
VOLTAGE
FIGURE 10. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
40
100
90
80
70
60
50
40
30
20
10
V
CC
= 3.3V
35
30
25
20
15
10
5
V
= 3.3V
L
V
= 2.5V
L
V
≤ 2V
3
L
DE = V
85
= V
L
CC
0
0
0
1
2
4
5
6
7
7.5
-40
10
60
TEMPERATURE (°C)
110 125
-15
35
DI VOLTAGE (V)
FIGURE 11. SUPPLY CURRENT vs TEMPERATURE
FIGURE 12. V SUPPLY CURRENT vs LOGIC PIN VOLTAGE
L
50
45
40
35
30
25
20
4.5
4.0
3.5
3.0
V
= 1.35V, t
DDLH
L
V
= 1.35V, t
DDHL
L
V
= 1.5V, t
, t
DDLH DDHL
L
V
= 1.35V
= 1.5V
L
2.5
2.0
1.5
1.0
0.5
0
V
= 1.8V, t
, t
L
DDLH DDHL
V
L
V
= V , t
, t
L
CC DDLH DDHL
V
≥ 1.8V
35
L
-40
-15
10
35
60
85
110 125
-40
-15
10
60
85
110 125
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 13. DRIVER DIFFERENTIAL PROPAGATION DELAY vs
TEMPERATURE
FIGURE 14. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE
FN6544 Rev.4.00
Oct 9, 2019
Page 11 of 17
ISL3295E, ISL3298E
V
= V = 3.3V, T = +25°C, unless otherwise specified. (Continued)
CC
L
A
200
150
100
50
6
5
4
3
2
1
0
V
= 1.35V
L
V
= 1.5V
Y OR Z = LOW
L
0
V
≥ 1.8V
L
-50
-100
-150
Y OR Z = HIGH
-7 -6
-4
-2
0
2
4
6
8
10
12
-40
-15
10
35
60
85
110 125
OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
FIGURE 16. DRIVER OUTPUT CURRENT vs SHORT-CIRCUIT
VOLTAGE
FIGURE 15. DRIVER SINGLE-ENDED SKEW vs TEMPERATURE
R
= 54Ω, C = 50pF
R
= 54Ω, C = 50pF
DIFF D
DIFF
D
3
0
3
0
DI
Z
DI
Y
3.0
1.5
3.0
1.5
Y
Z
0
0
3
2
3
2
1
1
Y - Z
Y - Z
0
0
-1
-2
-3
-1
-2
-3
TIME (10ns/DIV)
TIME (10ns/DIV)
FIGURE 18. DRIVER WAVEFORMS, HIGH-TO-LOW
FIGURE 17. DRIVER WAVEFORMS, LOW-TO-HIGH
V
= 1.35V
R
= 54Ω C = 50pF
V
= 1.35V
DI
R
= 54Ω, C = 50pF
DIFF D
L
DIFF
D
L
3
0
3
0
DI
3.0
1.5
3.0
1.5
Z
Y
Y
Z
0
0
3
2
3
2
1
1
Y - Z
0
0
Y - Z
-1
-2
-3
-1
-2
-3
TIME (10ns/DIV)
TIME (10ns/DIV)
FIGURE 19. DRIVER WAVEFORMS, LOW-TO-HIGH
FIGURE 20. DRIVER WAVEFORMS, HIGH-TO-LOW
FN6544 Rev.4.00
Oct 9, 2019
Page 12 of 17
ISL3295E, ISL3298E
Die Characteristics
SUBSTRATE AND TDFN THERMAL PAD POTENTIAL
(POWERED UP):
GND
TRANSISTOR COUNT:
516
PROCESS:
Si Gate BiCMOS
FN6544 Rev.4.00
Oct 9, 2019
Page 13 of 17
ISL3295E, ISL3298E
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to the web to make sure that
you have the latest revision.
DATE
REVISION
FN6544.4
CHANGE
Oct 9, 2019
Updated links throughout.
Removed ISL3293E, ISL3294E, ISL3296E, and ISL3297E information from document.
Updated Pin Configuration diagrams
Updated ordering information table by adding tape and reel quantity column and updating notes.
Updated Figure 9.
Removed About Intersil section
Updated Disclaimer.
Sep 25, 2015
Jul 27, 2015
FN6544.3
FN6544.2
On page 1, table 1, for ISL3293E entry, added "Recommended replacement: ISL32613E" after "No longer
available or supported". For ISL3294E entry, added "Recommended replacement: ISL32614E" after "No
longer available or supported".
On page 3, "Ordering Information" table, for ISL3293E entries (rows 1 and 2), added "Recommended
replacement: ISL32613E" after "No longer available or supported". For ISL3294E entries (rows 3 and 4),
added "Recommended replacement: ISL32614E" after "No longer available or supported".
Table 1 Summary of Features on page 1, added “No longer available or supported” to ISL3293E, ISL3294E,
ISL3296E, ISL3297E.
Ordering Information table on page 3, added “No longer available or supported” to the following parts:
ISL3293E and ISL3294E (1st 4 rows) and to ISL3296E and ISL3297E (rows 7-10).
Electrical Spec table, added “(Parts no longer available or supported)” to DRIVER SWITCHING
CHARACTERISTICS sections on page 6 (for parts ISL3293E, ISL3296E and ISL3294E, ISL3297E).
POD on page 16, updated from ref 1 to rev 2. Changes since rev 1:
Tiebar Note updated
From: Tiebar shown (if present) is a non-functional feature.
To: Tiebar shown (if present) is a non-functional feature and may be located on any of the 4 sides (or ends).
Dec 11, 2014
Sep 19, 2007
FN6544.1
FN6544.0
Updated entire datasheet to Intersil new standard.
Added text in several places to clarify that VL can be connected to Vcc.
Updated PODs P6.064 and L8.2x3A to latest revisions with changes as follows:
Updated to new POD format by removing table listing dimensions and moving dimensions onto drawing.
Added Typical Recommended Land Pattern.
Initial Release.
FN6544 Rev.4.00
Oct 9, 2019
Page 14 of 17
ISL3295E, ISL3298E
For the most recent package outline drawing, see P6.064.
Package Outline Drawings
P6.064
6 LEAD SMALL OUTLINE TRANSISTOR PLASTIC PACKAGE
Rev 4, 2/10
0-8°
1.90
0.95
0.08-0.22
D
A
6
5
4
1.60 +0.15/-0.10
2.80
3
3
(0.60)
PIN 1
INDEX AREA
1
2
3
0.20
2x
C
SEE DETAIL X
END VIEW
B
0.40 ±0.10
0.20 M
3
A-B
C
D
TOP VIEW
10° TYP
(2 PLCS)
3
2.90 ±0.10
(0.25)
GAUGE
PLANE
1.45 MAX
1.15 +0.15/-0.25
C
0.10
C
SEATING PLANE
0.00-0.15
0.45±0.1
4
SIDE VIEW
DETAIL "X"
(0.95)
(0.60)
(1.20)
NOTES:
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
(2.40)
2. Dimensioning and tolerancing conform to ASME Y14.5M-1994.
3. Dimension is exclusive of mold flash, protrusions or gate burrs.
4. Foot length is measured at reference to guage plane.
Package conforms to JEDEC MO-178AB.
5.
TYPICAL RECOMMENDED LAND PATTERN
FN6544 Rev.4.00
Oct 9, 2019
Page 15 of 17
ISL3295E, ISL3298E
L8.2x3A
For the most recent package outline drawing, see L8.2x3A.
8 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE WITH E-PAD
Rev 2, 05/15
6
0.25
2.00
PIN #1 INDEX AREA
A
B
0.50
6
PIN 1
INDEX AREA
(4X)
0.15
(8x0.40)
1.65 +0.1/ -0.15
TOP VIEW
BOTTOM VIEW
(8x0.25)
PACKAGE
OUTLINE
(6x0.50)
SEE DETAIL "X"
C
BASE PLANE
SEATING PLANE
0.05
0.08 C
SIDE VIEW
5
0.20 REF
(8x0.40)
(8x0.20)
C
1.65
2.00
0.05
TYPICAL RECOMMENDED LAND PATTERN
DETAIL "X"
NOTES:
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2. Dimensioning and tolerancing conform to ASME Y14.5m-1994.
3.
Unless otherwise specified, tolerance : Decimal ± 0.05
4. Dimension b applies to the metallized terminal and is measured
between 0.20mm and 0.32mm from the terminal tip.
Tiebar shown (if present) is a non-functional feature and may
be located on any of the 4 sides (or ends).
5.
6.
The configuration of the pin #1 identifier is optional, but must be
located within the zone indicated. The pin #1 indentifier may be
either a mold or mark feature.
FN6544 Rev.4.00
Oct 9, 2019
Page 16 of 17
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