ISL32450EIBZ [RENESAS]
±60V Fault Protected, 3.3V to 5V, ±20V Common-Mode Range, RS-485/RS-422 Transceivers with Cable Invert and ±15kV ESD;
| 型号： | ISL32450EIBZ |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | ±60V Fault Protected, 3.3V to 5V, ±20V Common-Mode Range, RS-485/RS-422 Transceivers with Cable Invert and ±15kV ESD 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23页 (文件大小：1239K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATASHEET
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
FN7921
Rev.2.00
Aug 31, 2017
±60V Fault Protected, 3.3V to 5V, ±20V Common-Mode Range, RS-485/RS-422
Transceivers with Cable Invert and ±15kV ESD
The ISL3245xE are 3.3V to 5V powered, fault protected,
Features
extended Common-Mode Range (CMR) differential
• Fault protected RS-485 bus pins . . . . . . . . . . . . . . up to ±60V
transceivers for balanced communication. The RS-485 bus
pins (driver outputs and receiver inputs) are protected against
overvoltages up to ±60V, and against ±15kV ESD strikes.
These transceivers operate in environments with common-
mode voltages up to ±20V (exceeds the RS-485 requirement),
making this RS-485 family one of the more robust on the
market.
• Extended common-mode range . . . . . . . . . . . . . . . . . . . ±20V
larger than required for RS-485
• ±15kV HBM ESD protection on RS-485 bus pins
• Wide supply range . . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 5.5V
• Cable invert pin (ISL32457E and ISL32459E only)
corrects for reversed cable connections while maintaining
Rx full fail-safe functionality
Transmitters are RS-485 compliant with V ≥ 4.5V and
CC
deliver a 1.1V differential output voltage into the RS-485
specified 54Ω load even with V = 3V. Receiver (Rx) inputs
• 1/4 unit load for up to 128 devices on the bus
CC
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. Rx full fail-safe operation is maintained even
when the Rx input polarity is switched (cable invert function on
ISL32457E and ISL32459E).
• High transient overvoltage tolerance. . . . . . . . . . . . . . . . ±80V
• Full fail-safe (open, short, terminated) RS-485 receivers
• Choice of RS-485 data rates . . . . . . . . . . . . . . . . . . up to 20Mbps
• Low quiescent supply current . . . . . . . . . . . . . . . . . . . . . 2.1mA
The ISL32457E and ISL32459E include a cable invert function
that reverses the polarity of the Rx and Tx bus pins in case the
cable is misconnected during installation.
Applications
• Utility meters and automated meter reading systems
See Table 1 on page 2 for key features and configurations by
device number.
• Air conditioning systems
• Security camera networks
• Building lighting and environmental control systems
• Industrial and process control networks
Related Literature
• ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E,
ISL32458E, and ISL32459E product pages
20
12
V
= 3V
CC
A
B
20
15
10
5
VID = ±1V
2Mbps
0
-7
RO
0
-20
STANDARD RS-485
TRANSCEIVER
ISL3245XE
TIME (200ns/DIV)
FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON-MODE
RANGE vs STANDARD RS-485 DEVICES
FIGURE 1. EXCEPTIONAL ISL32453E RX OPERATES AT >1Mbps
EVEN WITH ±20V COMMON-MODE VOLTAGE
FN7921 Rev.2.00
Aug 31, 2017
Page 1 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
HALF/FULL
DUPLEX
DATA RATE SLEW-RATE
EN
PINS?
HOT
PLUG
CABLE INVERT
(INV) PIN?
QUIESCENT I
(mA)
LOW POWER
SHDN?
CC
(Mbps)
0.25
0.25
1
LIMITED?
PIN COUNT
ISL32450E
ISL32452E
ISL32453E
ISL32455E
ISL32457E
ISL32458E
ISL32459E
Full
Half
Full
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
No
Yes
No
Yes
2.1
2.1
2.1
2.1
2.1
2.1
2.1
Yes
Yes
Yes
Yes
No
10, 14
Yes
8
Yes
Yes
10, 14
Half
Half
Half
Half
1
Yes
Yes
8
8
8
8
0.25
20
Yes
Tx Only
Yes
No
Yes
No
20
No
Tx Only
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP. RANGE
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
(°C)
ISL32450EIBZ
ISL32450EIUZ
ISL32452EIBZ
ISL32452EIUZ
ISL32453EIBZ
ISL32453EIUZ
ISL32455EIBZ
ISL32455EIUZ
ISL32457EIBZ
ISL32457EIUZ
ISL32458EIBZ
ISL32459EIBZ
NOTES:
ISL32450 EIBZ
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
14 Ld SOIC
M14.15
2450E
10 Ld MSOP
8 Ld SOIC
8 Ld MSOP
14 Ld SOIC
10 Ld MSOP
8 Ld SOIC
8 Ld MSOP
8 Ld SOIC
8 Ld MSOP
8 Ld SOIC
8 Ld SOIC
M10.118
M8.15
32452 EIBZ
2452E
M8.118
M14.15
M10.118
M8.15
ISL32453 EIBZ
2453E
32455 EIBZ
2455E
M8.118
M8.15
32457 EIBZ
2457E
M8.118
M8.15
32458 EIBZ
32459 EIBZ
M8.15
1. Add “-T” suffix for 2.5k unit or “-T7A” suffix for 250 unit tape and reel options. Refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), see the product information pages for ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E,
ISL32459E. For more information on MSL, refer to TB363.
FN7921 Rev.2.00
Aug 31, 2017
Page 2 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Pin Configurations
ISL32450E, ISL32453E
(14 LD SOIC)
ISL32450E, ISL32453E
(10 LD MSOP)
TOP VIEW
TOP VIEW
RO
RE
1
2
3
4
5
V
A
10
9
NC
RO
1
2
3
4
5
6
7
14
V
CC
CC
R
D
13 NC
R
D
8
DE
B
Z
RE
12
11
10
9
A
7
DI
DE
B
6
GND
Y
DI
Z
GND
GND
Y
8
NC
ISL32452E, ISL32455E, ISL32458E
(8 LD SOIC, 8 LD MSOP)
TOP VIEW
ISL32457E, ISL32459E
(8 LD SOIC, 8 LD MSOP)
TOP VIEW
RO
RE
DE
DI
1
2
3
4
8
7
6
5
V
CC
RO
INV
DE
DI
1
2
3
4
8
7
6
5
V
CC
R
D
R
D
B/Z
B/Z
A/Y
A/Y
GND
GND
NOTE: Evaluate creepage and clearance requirements at your maximum fault voltage before using small pitch packages, such as MSOP.
Truth Tables
TRANSMITTING
RECEIVING
INPUTS
INPUTS
OUTPUTS
OUTPUT
RO
RE
X
DE
1
DI
1
0
1
0
X
INV (Note 4)
Y
1
0
0
1
Z
RE
DE
DE
Full
A-B
INV
(Note 4)
(Note 19) Half
0
0
1
1
X
X
0
1
Duplex Duplex
X
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
X
X
X
X
X
X
V
≥ -0.01V
0
0
0
1
1
1
X
1
AB
X
1
1
-0.01V > V > -0.2V
AB
Undetermined
X
1
0
V
≤ -0.2V
0
AB
0
0
High-Z
High-Z
High-Z
High-Z
V
≤ 0.01V
1
AB
1
0
X
0.01V < V < 0.2V
AB
Undetermined
(Note 5) (Note 5)
≥ 0.2V
0
1
NOTES:
Inputs
Open or
Shorted
4. Parts without the INV pin follow the rows with INV = “0” and “X”.
5. Low Power Shutdown mode (see Notes 14 and 19).
1
1
0
1
0
1
X
X
X
High-Z
(Note 5)
X
High-Z
FN7921 Rev.2.00
Aug 31, 2017
Page 3 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Pin Descriptions
ISL32452E,
ISL32455E,
ISL32458E
(8 LD SOIC,
ISL32457E,
ISL32459E
(8 LD SOIC,
8 LD MSOP)
PIN #
ISL32450E,
ISL32453E,
ISL32450E,
ISL32453E,
PIN
(14 LD SOIC) (10 LD MSOP) 8 LD MSOP)
NAME
PIN #
PIN #
PIN #
FUNCTION
RO
2
1
1
1
Receiver output. For parts without the cable invert function - or if INV is low -
then: If A - B ≥ -10mV, RO is high; if A - B ≤ -200mV, RO is low. If INV 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 (that is, Rx is always fail-safe open, shorted and idle,
even if polarity is inverted).
RE
DE
DI
3
4
5
2
3
4
2
3
4
N/A
3
Receiver output enable. RO is enabled when RE is low; RO is high impedance
when RE is high. Internally pulled low.
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.
4
Driver input. For parts without the cable invert function - or if INV 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 is high.
GND
A/Y
6, 7
N/A
5
5
6
5
6
Ground connection.
N/A
±60V fault protected and ±16.5kV ESD protected RS-485/RS-422 I/O pin. For
parts without the cable invert function - or if INV is low - A/Y is the noninverting
receiver input and noninverting 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
N/A
N/A
7
7
±60V fault protected and ±16.5kV ESD protected RS-485/RS-422 I/O pin. For
parts without the cable invert function - or if INV is low - B/Z is the inverting
receiver input and inverting driver output. If INV is high, B/Z is the noninverting
receiver input and the noninverting driver output. Pin is an input if DE = 0; pin
is an output if DE = 1.
A
B
Y
Z
12
11
9
9
8
6
7
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
±60V fault protected and ±15kV ESD protected RS-485/RS-422 noninverting
receiver input.
±60V fault protected and ±15kV ESD protected RS-485/RS-422 inverting
receiver input.
±60V fault protected and ±15kV ESD protected RS-485/RS-422 noninverting
driver output.
10
±60V fault protected and ±15kV ESD protected RS-485/RS-422 inverting
driver output.
V
14
10
8
8
2
System power supply input (3V to 5.5V).
CC
INV
N/A
N/A
N/A
Receiver and driver cable invert (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.
NC
1, 8, 13
N/A
N/A
N/A
No internal connection.
FN7921 Rev.2.00
Aug 31, 2017
Page 4 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Typical Operating Circuits
+3.3V
+3.3V
+
+
0.1μF
0.1μF
14
R
14
CC
V
V
CC
R
T
9
A
B
12
11
Y
Z
DI
2
5
RO
10
D
3
4
RE
DE
DE 4
3
2
RE
RO
R
10
9
11
12
Z
Y
B
A
T
5
DI
R
D
GND
6, 7
GND
6, 7
SOIC PINOUT SHOWN
FIGURE 3. ISL32450E, ISL32453E FULL DUPLEX NETWORK
+3.3V
+3.3V
8
+
+
8
0.1μF
0.1μF
V
V
CC
CC
RO
1
2
4
DI
R
D
RE
DE
R
R
3
2
B/Z
A/Y
7
6
T
7
6
B/Z
A/Y
DE
RE
T
3
4
DI
1
RO
R
D
GND
GND
5
5
FIGURE 4. ISL32452E, ISL32455E, ISL32458E HALF DUPLEX NETWORK
+3.3V
8
+3.3V
+
+
0.1μF
0.1μF
8
V
V
CC
CC
2
1
INV
RO
RO
1
3
R
R
R
T
R
A/Y
B/Z
B/Z
A/Y
7
6
6
7
T
DE
DI
3
4
DE
DI
4
2
D
D
THE IC ON THE LEFT HAS THE CABLE CONNECTIONS
SWAPPED, SO THE INV PIN IS STRAPPED HIGH TO
INVERT THE RX AND TX POLARITY
INV
GND
5
GND
5
FIGURE 5. ISL32457E, ISL32459E HALF DUPLEX NETWORK USING CABLE INVERT FUNCTION
FN7921 Rev.2.00
Aug 31, 2017
Page 5 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Absolute Maximum Ratings
Thermal Information
V
to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Thermal Resistance (Typical)
(°C/W)
108
140
135
88
JC
(°C/W)
47
40
50
39
CC
JA
Input Voltages
8 Ld SOIC Package (Notes 7, 8) . . . . . . . . . .
8 Ld MSOP Package (Notes 7, 8) . . . . . . . . .
10 Ld MSOP Package (Notes 7, 8) . . . . . . . .
14 Ld SOIC Package (Notes 7, 8) . . . . . . . . .
Maximum Junction Temperature (Plastic Package). . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . . . -65°C to +150°C
Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see TB493
DI, DE, RE, INV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V + 0.3V
CC
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 6) . . . . . . . . . . . . . . . . . . . ±80V
RO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V +0.3V)
CC
Short-Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . see “Electrical Specifications”
Latch-Up (per JESD78, Level 2, Class A) . . . . . . . . . . . . . . . . . . . . . +125°C
Recommended Operating Conditions
Supply Voltage (V ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3V or 5V
CC
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Bus Pin Common-Mode Voltage Range. . . . . . . . . . . . . . . . . . -20V to +20V
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:
6. Tested according to TIA/EIA-485-A, Section 4.2.6 (±80V for 15μs at a 1% duty cycle).
7. is measured with the component mounted on a high-effective thermal conductivity test board in free air. Refer to TB379 for details.
JA
8. For , the “case temp” location is taken at the package top center.
JC
Electrical Specifications Test Conditions: V = 3V to 3.6V and 4.5V to 5.5V, unless otherwise specified. Typicals are at the worst case of
CC
V
= 5V or V = 3.3V, T = +25°C (Note 9). Boldface limits apply across the operating temperature range, -40°C to +85°C.
CC
CC A
TEMP
(°C)
MIN
(Note 17)
MAX
(Note 17)
PARAMETER
DC CHARACTERISTICS
SYMBOL
TEST CONDITIONS
TYP
UNIT
Driver Differential V
(No load)
(Loaded,
V
Full
Full
Full
Full
Full
-
2
-
3
V
V
V
V
V
V
OUT
OD1
CC
Driver Differential V
Figure 6A)
V
R = 100Ω (RS-422), V ≥ 4.5V
CC
-
OUT
OD2
L
R = 54Ω (RS-485)
V
≥ 4.5V
≥ 3V
1.7
1.1
-
2.3
1.3
-
V
V
L
CC
CC
CC
V
CC
Change in Magnitude of Driver
Differential V for Complementary
V
R = 54Ω or 100Ω (Figure 6A)
0.2
OD
L
OUT
Output States
Driver Differential V
with
Common-Mode Load (Figure 6B)
V
R = 60Ω, -20V ≤ V ≤ 20V, V ≥ 4.5V
CM CC
Full
Full
Full
1.5
-1
-
-
-
-
-
V
V
V
OUT
OD3
L
Driver Common-Mode V
(Figure 6A)
V
R = 54Ω or 100Ω
3
OUT
OC
L
Change in Magnitude of Driver
Common-Mode V for
V
R = 54Ω or 100Ω (Figure 6A)
0.2
OC
L
OUT
Complementary Output States
Driver Short-Circuit Current
I
DE = V , -20V ≤ V ≤ 20V (Note 11)
CC
Full
Full
Full
Full
Full
Full
Full
-250
-83
-13
2.35
-
-
-
250
83
13
-
mA
mA
mA
V
OSD
O
I
I
At first fold-back, 24V ≤ V ≤ -24V
O
OSD1
At second fold-back, 35V ≤ V ≤ -35V
-
OSD2
O
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
V
DE, DI, RE, INV (See Figure 33)
-
IH
V
DE, DI, RE, INV
DI
-
0.8
1
V
IL
I
-1
-
μA
μA
IN1
DE, RE, INV
-15
6
15
FN7921 Rev.2.00
Aug 31, 2017
Page 6 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Electrical Specifications Test Conditions: V = 3V to 3.6V and 4.5V to 5.5V, unless otherwise specified. Typicals are at the worst case of
CC
V
= 5V or V = 3.3V, T = +25°C (Note 9). Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
CC
CC A
TEMP
(°C)
MIN
(Note 17)
MAX
(Note 17)
PARAMETER
SYMBOL
TEST CONDITIONS
TYP
UNIT
μA
Input/Output Current (A/Y, B/Z)
I
DE = 0V, V = 0V or
CC
V
V
V
V
V
V
V
V
V
V
V
V
V
V
= 12V
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
-
-
250
-
IN2
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
CC
CC
3.6V or 5.5V
= -7V
-200
-800
-6
-
μA
= ±20V
-
850
6
μA
= ±60V, (Note 18)
= 12V
-
mA
μA
Input Current (A, B)
(Full Duplex Versions Only)
I
V
= 0V or 3.6V or
-
-
125
-
IN3
CC
5.5V
= -7V
-100
-500
-3
-
μA
= ±20V
-
500
3
μA
= ±60V, (Note 18)
= 12V
-
mA
μA
Output Leakage Current (Y, Z)
(Full Duplex Versions Only)
I
RE = 0V, DE = 0V,
-
-
200
-
OZD
V
= 0V or 3.6V or
CC
5.5V
= -7V
-100
-500
-3
-
μA
= ±20V
-
500
3
μA
= ±60V, (Note 18)
≤ 3.6V
-
mA
mV
mV
Receiver Differential Threshold
Voltage
V
-20V ≤ V ≤ 20V,
-200
-250
-120
-180
-10
-10
TH
CM
(For ISL32457E and
ISL32459E only, A-B
if INV = 0; B-A if
INV = 1)
≥ 4.5V
Receiver Input Hysteresis
V
-20V ≤ V ≤ 20V
CM
+25
Full
Full
Full
Full
Full
-
2.4
2.4
-
30
-
-
mV
V
TH
OH1
OH2
Receiver Output High Voltage
V
V
V
= -10mV
I
I
= -4mA, V ≥ 3V
CC
-
ID
O
O
= -8mA, V ≥ 4.5V
CC
-
-
V
Receiver Output Low Voltage
V
I
I
= 4mA, V ≥ 3V V = -200mV
CC ID
-
-
0.4
0.4
1
V
OL
O
O
,
= 5mA, V ≥ 4.5V V = -250mV
-
V
CC
CC
, ID
Three-State (High Impedance)
I
0V ≤ V ≤ V
-1
0.01
μA
OZR
O
Receiver Output Current (Note 19)
Receiver Short-Circuit Current
SUPPLY CURRENT
I
0V ≤ V ≤ V
Full
-
-
±115
mA
OSR
O
CC
No-Load Supply Current (Note 10)
Shutdown Supply Current (Note 19)
ESD PERFORMANCE
I
DE = V , RE = 0V or V , DI = 0V or V
CC CC CC
Full
Full
-
-
2.1
10
4.5
35
mA
CC
I
DE = 0V, RE = V , DI = 0V or V
CC
μA
SHDN
CC
All Pins
Human Body Model
+25
-
±8
-
kV
(ISL32450E, ISL32452E, ISL32453E,
ISL32455E, ISL32457E; Tested per
JESD22-A114E)
Human Body Model
(ISL32458E, ISL32459E; Tested per
JESD22-A114E)
+25
+25
-
-
±3
-
-
kV
V
Machine Model
±700
(Tested per JESD22-A115-A)
RS-485 Pins (A, B, Y, Z,
A/Y, B/Z)
Human Body Model, Full Duplex
From Bus Pins to
+25
+25
-
-
±15
-
-
kV
kV
Half Duplex
GND
±16.5
FN7921 Rev.2.00
Aug 31, 2017
Page 7 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Electrical Specifications Test Conditions: V = 3V to 3.6V and 4.5V to 5.5V, unless otherwise specified. Typicals are at the worst case of
CC
V
= 5V or V = 3.3V, T = +25°C (Note 9). Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
CC
CC A
TEMP
(°C)
MIN
(Note 17)
MAX
(Note 17)
PARAMETER
SYMBOL
TEST CONDITIONS
TYP
UNIT
DRIVER SWITCHING CHARACTERISTICS (250kbps VERSIONS; ISL32450E, ISL32452E, ISL32457E)
Driver Differential Output Delay
Driver Differential Output Skew
Driver Differential Rise or Fall Time
Maximum Data Rate
t
t
R
R
R
= 54Ω, C = 50pF (Figure 7)
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
-
280
1000
100
1500
-
ns
ns
PLH, PHL
D
D
D
D
D
t
= 54Ω, C = 50pF (Figure 7)
-
4
SKEW
D
t , t
= 54Ω, C = 50pF (Figure 7)
250
650
ns
R
F
D
f
C
= 820pF (Figure 9)
250
-
kbps
ns
MAX
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output Low
Driver Disable from Output High
Time to Shutdown
t
SW = GND (Figure 8), (Note 12)
SW = V (Figure 8), (Note 12)
-
-
1600
1600
300
300
600
3000
ZH
t
-
-
ns
ZL
LZ
HZ
CC
t
SW = V (Figure 8)
CC
-
-
ns
t
SW = GND (Figure 8)
-
60
-
-
160
-
ns
t
(Notes 14, 19)
ns
SHDN
Driver Enable from Shutdown to
Output High
t
SW = GND (Figure 8), (Notes 14, 15, 19)
ns
ZH(SHDN)
Driver Enable from Shutdown to
Output Low
t
SW = V (Figure 8), (Notes 14, 15, 19)
CC
Full
-
-
3000
ns
ZL(SHDN)
DRIVER SWITCHING CHARACTERISTICS (1Mbps VERSIONS; ISL32453E, ISL32455E)
Driver Differential Output Delay
Driver Differential Output Skew
Driver Differential Rise or Fall Time
Maximum Data Rate
t
t
R
R
R
= 54Ω, C = 50pF (Figure 7)
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
-
70
200
25
ns
ns
PLH, PHL
D
D
D
D
D
t
= 54Ω, C = 50pF (Figure 7)
-
4
SKEW
D
t , t
= 54Ω, C = 50pF (Figure 7)
50
130
300
-
ns
R
F
D
f
C
= 820pF (Figure 9)
1
-
Mbps
ns
MAX
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output Low
Driver Disable from Output High
Time to Shutdown
t
SW = GND (Figure 8), (Note 12)
SW = V (Figure 8), (Note 12)
-
-
300
300
300
300
600
3000
ZH
t
-
-
ns
ZL
LZ
HZ
CC
t
SW = V (Figure 8)
CC
-
-
ns
t
SW = GND (Figure 8)
(Note 14)
-
60
-
-
160
-
ns
t
ns
SHDN
Driver Enable from Shutdown to
Output High
t
SW = GND (Figure 8), (Notes 14, 15)
ns
ZH(SHDN)
Driver Enable from Shutdown to
Output Low
t
SW = V (Figure 8), (Notes 14, 15)
CC
Full
-
-
3000
ns
ZL(SHDN)
DRIVER SWITCHING CHARACTERISTICS (20Mbps VERSIONS; ISL32458E, ISL32459E)
Driver Differential Output Delay
Driver Differential Output Skew
Driver Differential Rise or Fall Time
Maximum Data Rate
t
t
R
R
R
= 54Ω, C = 50pF (Figure 7)
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
-
28
45
9
ns
ns
PLH, PHL
D
D
D
D
D
t
= 54Ω, C = 50pF (Figure 7)
-
3
SKEW
D
t , t
= 54Ω, C = 50pF (Figure 7)
-
17
35
ns
R
F
D
f
C
= 470pF (Figure 9)
20
-
-
Mbps
ns
MAX
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable from Output Low
Driver Disable from Output High
Time to Shutdown
t
SW = GND (Figure 8), (Note 12)
SW = V (Figure 8), (Note 12)
-
-
180
180
300
300
600
3000
ZH
t
-
-
ns
ZL
LZ
HZ
CC
t
SW = V (Figure 8)
CC
-
-
ns
t
SW = GND (Figure 8)
-
60
-
-
160
-
ns
t
(Notes 14, 19)
ns
SHDN
Driver Enable from Shutdown to
Output High
t
SW = GND (Figure 8), (Notes 14, 15, 19)
ns
ZH(SHDN)
FN7921 Rev.2.00
Aug 31, 2017
Page 8 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Electrical Specifications Test Conditions: V = 3V to 3.6V and 4.5V to 5.5V, unless otherwise specified. Typicals are at the worst case of
CC
V
= 5V or V = 3.3V, T = +25°C (Note 9). Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
CC
CC A
TEMP
(°C)
MIN
(Note 17)
MAX
(Note 17)
PARAMETER
SYMBOL
TEST CONDITIONS
SW = V (Figure 8), (Notes 14, 15, 19)
TYP
-
UNIT
ns
Driver Enable from Shutdown to
Output Low
t
Full
-
3000
ZL(SHDN)
CC
RECEIVER SWITCHING CHARACTERISTICS (250kbps VERSIONS; ISL32450E, ISL32452E, ISL32457E)
Maximum Data Rate
f
(Figure 10)
(Figure 10)
(Figure 10)
Full
Full
Full
Full
250
-
240
6
-
kbps
ns
MAX
Receiver Input to Output Delay
t
PLH PHL
, t
-
-
-
325
25
80
Receiver Skew |t
- t
|
t
ns
PLH PHL
SKD
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable from Output Low
Receiver Disable from Output High
Time to Shutdown
t
R = 1kΩ, C = 15pF, SW = V (Figure 11),
CC
-
ns
ZL
L
L
(Notes 13, 19)
t
R = 1kΩ, C = 15pF, SW = GND (Figure 11),
Full
Full
Full
-
-
-
-
-
-
80
80
80
ns
ns
ns
ZH
L
L
(Notes 13, 19)
t
R = 1kΩ, C = 15pF, SW = V (Figure 11),
LZ
L
L
CC
(Note 19)
t
R = 1kΩ, C = 15pF, SW = GND (Figure 11),
HZ
L
L
(Note 19)
t
(Notes 14, 19)
R = 1kΩ, C = 15pF, SW = GND (Figure 11),
Full
Full
60
160
-
600
ns
ns
SHDN
Receiver Enable from Shutdown to
Output High
t
ZH(SHDN)
-
2500
L
L
(Notes 14, 16, 19)
Receiver Enable from Shutdown to
Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 11),
(Notes 14, 16, 19)
Full
-
-
2500
ns
ZL(SHDN)
L
L
CC
RECEIVER SWITCHING CHARACTERISTICS (1Mbps VERSIONS; ISL32453E, ISL32455E)
Maximum Data Rate
f
(Figure 10)
(Figure 10)
(Figure 10)
Full
Full
Full
Full
1
-
-
115
4
-
Mbps
ns
MAX
Receiver Input to Output Delay
t
PLH PHL
, t
200
20
80
Receiver Skew |t
- t
|
t
-
ns
PLH PHL
SKD
Receiver Enable to Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 11),
-
-
ns
ZL
L
L
CC
(Note 13)
Receiver Enable to Output High
t
R = 1kΩ, C = 15pF, SW = GND (Figure 11),
Full
-
-
80
ns
ZH
L
L
(Note 13)
Receiver Disable from Output Low
Receiver Disable from Output High
Time to Shutdown
t
R = 1kΩ, C = 15pF, SW = V (Figure 11)
CC
Full
Full
Full
Full
-
-
80
80
ns
ns
ns
ns
LZ
L
L
t
R = 1kΩ, C = 15pF, SW = GND (Figure 11)
-
60
-
-
160
-
HZ
L
L
t
(Note 14)
600
2500
SHDN
Receiver Enable from Shutdown to
Output High
t
ZH(SHDN)
R = 1kΩ, C = 15pF, SW = GND (Figure 11),
L L
(Notes 14, 16)
Receiver Enable from Shutdown to
Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 11),
(Notes 14, 16)
Full
-
-
2500
ns
ZL(SHDN)
L
L
CC
RECEIVER SWITCHING CHARACTERISTICS (20Mbps VERSIONS; ISL32458E, ISL32459E)
Maximum Data Rate
f
(Figure 10)
(Figure 10)
(Figure 10)
Full
Full
Full
Full
20
-
40
3
-
Mbps
ns
MAX
Receiver Input to Output Delay
t
, t
-
-
-
80
9
PLH PHL
Receiver Skew |t
- t
|
t
ns
PLH PHL
SKD
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable from Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 11),
CC
-
80
ns
ZL
L
L
(Notes 13, 19)
t
R = 1kΩ, C = 15pF, SW = GND (Figure 11),
Full
Full
-
-
-
-
80
80
ns
ns
ZH
L
L
(Notes 13, 19)
t
R = 1kΩ, C = 15pF, SW = V (Figure 11),
LZ
L
L
CC
(Note 19)
FN7921 Rev.2.00
Aug 31, 2017
Page 9 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Electrical Specifications Test Conditions: V = 3V to 3.6V and 4.5V to 5.5V, unless otherwise specified. Typicals are at the worst case of
CC
V
= 5V or V = 3.3V, T = +25°C (Note 9). Boldface limits apply across the operating temperature range, -40°C to +85°C. (Continued)
CC
CC A
TEMP
(°C)
MIN
(Note 17)
MAX
(Note 17)
PARAMETER
SYMBOL
TEST CONDITIONS
TYP
-
UNIT
ns
Receiver Disable from Output High
t
R = 1kΩ, C = 15pF, SW = GND (Figure 11),
Full
-
80
HZ
L
L
(Note 19)
Time to Shutdown
t
(Notes 14, 19)
R = 1kΩ, C = 15pF, SW = GND (Figure 11),
Full
Full
60
160
-
600
ns
ns
SHDN
Receiver Enable from Shutdown to
Output High
t
-
2500
ZH(SHDN)
L
L
(Notes 14, 16, 19)
Receiver Enable from Shutdown to
Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 11),
(Notes 14, 16, 19)
Full
-
-
2500
ns
ZL(SHDN)
L
L
CC
NOTES:
9. 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.
10. Supply current specification is valid for loaded drivers when DE = 0V.
11. Applies to peak current. See “Typical Performance Curves” beginning on page 15 for more information.
12. Keep RE = 0 to prevent the device from entering SHDN (does not apply to the ISL32457E and ISL32459E).
13. The RE signal high time must be short enough (typically <100ns) to prevent the device from entering SHDN.
14. Transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 60ns, the parts are guaranteed not to enter
shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See “Low Power Shutdown Mode” on
page 14
15. Keep RE = VCC, and set the DE signal low time >600ns to ensure that the device enters SHDN.
16. Set the RE signal high time >600ns to ensure that the device enters SHDN.
17. Compliance to data sheet limits is assured by one or more methods: production test, characterization and/or design.
18. See “Caution” statement below the “Recommended Operating Conditions” on page 6.
19. Does not apply to the ISL32457E and ISL32459E. These transceivers have no Rx enable function, and thus no SHDN function.
Test Circuits and Waveforms
R /2
L
R /2
L
375Ω
375Ω
DE
DI
DE
DI
V
V
CC
CC
Z
Y
Z
Y
V
CM
V
V
D
OD
D
OD
V
R /2
L
R /2
L
OC
FIGURE 6A. V AND V
OD OC
FIGURE 6B. V WITH COMMON-MODE LOAD
OD
FIGURE 6. DC DRIVER TEST CIRCUITS
FN7921 Rev.2.00
Aug 31, 2017
Page 10 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Test Circuits and Waveforms(Continued)
3V
0V
DI
50%
50%
DE
t
t
PHL
PLH
V
CC
V
V
Z
Y
OH
OL
OUT (Z)
OUT (Y)
DI
R
C
D
D
D
SIGNAL
GENERATOR
+V
OD
90%
10%
90%
10%
DIFF OUT (Y - Z)
-V
OD
t
t
R
F
SKEW = |t |
- t
PLH PHL
FIGURE 7A. TEST CIRCUIT
FIGURE 7. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
FIGURE 7B. MEASUREMENT POINTS
DE
DI
Z
Y
110Ω
V
CC
D
3V
0V
GND
SW
SIGNAL
GENERATOR
DE
50%
50%
Note 14
C
L
t
, t
ZH ZH(SHDN)
t
HZ
Note 14
OUTPUT HIGH
V
OH
V
- 0.5V
OH
PARAMETER
OUTPUT
Y/Z
RE
DI
SW
C
(pF)
50%
L
OUT (Y, Z)
0V
t
X
1/0
0/1
1/0
0/1
1/0
0/1
GND
50
50
HZ
t
, t
t
Y/Z
X
V
ZL ZL(SHDN)
t
LZ
LZ
CC
Note 14
V
CC
OL
t
Y/Z
0 (Note 12)
0 (Note 12)
1 (Note 15)
1 (Note 15)
GND
100
100
100
100
ZH
OUT (Y, Z)
50%
OUTPUT LOW
t
Y/Z
V
ZL
CC
V
+ 0.5V
OL
V
t
Y/Z
GND
ZH(SHDN)
t
Y/Z
V
CC
ZL(SHDN)
FIGURE 8B. MEASUREMENT POINTS
FIGURE 8. DRIVER ENABLE AND DISABLE TIMES
FIGURE 8A. TEST CIRCUIT
3V
DE
DI
V
CC
+
DI
Z
0V
V
54Ω
D
OD
-
C
D
Y
+V
OD
-V
SIGNAL
GENERATOR
DIFF OUT (Y - Z)
0V
OD
FIGURE 9B. MEASUREMENT POINTS
FIGURE 9A. TEST CIRCUIT
FIGURE 9. DRIVER DATA RATE
FN7921 Rev.2.00
Aug 31, 2017
Page 11 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Test Circuits and Waveforms(Continued)
RE
B
A
+2.25V
15pF
1.5V
1.5V
B
RO
R
+750mV
A
t
t
PHL
PLH
SIGNAL
GENERATOR
SIGNAL
GENERATOR
V
CC
50%
50%
RO
+1.5V
0V
FIGURE 10A. TEST CIRCUIT
FIGURE 10B. MEASUREMENT POINTS
FIGURE 10. RECEIVER PROPAGATION DELAY AND DATA RATE
RE
V
CC
B
A
1kΩ
Note 14
RO
R
3V
0V
GND
SW
SIGNAL
GENERATOR
RE
50%
50%
15pF
t
, t
ZH ZH(SHDN)
t
HZ
Note 14
PARAMETER
DE
0
A
SW
GND
OUTPUT HIGH
V
OH
V
- 0.5V
OH
t
+1.5V
-1.5V
+1.5V
-1.5V
+1.5V
-1.5V
1.5V
RO
HZ
0V
t
0
V
LZ
CC
t
, t
t
(Note 13)
(Note 13)
0
GND
t
ZL ZL(SHDN)
LZ
ZH
Note 14
RO
V
CC
t
0
V
ZL
CC
1.5V
OUTPUT LOW
t
(Note 16)
(Note 16)
0
GND
V
+ 0.5V
ZH(SHDN)
OL
V
OL
t
0
V
CC
ZL(SHDN)
FIGURE 11B. MEASUREMENT POINTS
FIGURE 11A. TEST CIRCUIT
FIGURE 11. RECEIVER ENABLE AND DISABLE TIMES
FN7921 Rev.2.00
Aug 31, 2017
Page 12 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Driver (Tx) Features
The RS-485/RS-422 driver is a differential output device that
delivers at least 1.7V across a 54Ω load (RS-485), and at least 2V
Application Information
RS-485 and RS-422 are differential (balanced) data
transmission standards used for 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, 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.
across a 100Ω load (RS-422) with V ≥ 4.5V. The drivers feature
CC
low propagation delay skew to maximize bit width and to
minimize EMI, and all drivers are tri-statable through the active
high DE input.
The 250kbps and 1Mbps driver outputs are slew rate limited to
minimize EMI and to minimize reflections in unterminated or
improperly terminated networks. Outputs of the ISL32458E and
ISL32459E drivers are not limited; thus, faster output transition
times allow data rates of at least 20Mbps.
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 feet; thus, the wide CMR is necessary to handle ground
potential differences, as well as voltages induced in the cable by
external fields.
High Overvoltage (Fault) Protection
Increases Ruggedness
NOTE: The available smaller pitch package (MSOP) may not meet the
Creepage and Clearance (C&C) requirements for ±60V levels. The user is
advised to determine his C&C requirements before selecting a package
type.
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 ISL32450E,
ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E,
ISL32459E ideal for applications in which power (such as 24V and
48V supplies) must be routed in the conduit with the data lines and
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 four times higher than
the levels specified for standard RS-485 ICs. The ISL32450E,
ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E,
ISL32459E protection is active whether the Tx is enabled or
disabled, and even if the IC is powered down.
The ISL32450E, ISL32452E, ISL32453E, ISL32455E,
ISL32457E, ISL32458E, ISL32459E are a family of ruggedized
RS-485 transceivers that improve on the RS-485 basic
requirements and therefore increases system reliability. The
CMR increases to ±20V, while the RS-485 bus pins (receiver
inputs and driver outputs) include fault protection against
voltages and transients up to ±60V. Additionally, the ±15kV to
±16.5kV built-in ESD protection complements the fault
protection.
Receiver (Rx) Features
These devices use a differential input receiver for maximum noise
immunity and common-mode rejection. Input sensitivity is better
than ±200mV (3.3V operation), as required by the RS-422 and
RS-485 specifications.
If transients or voltages (including overshoots and ringing)
greater than ±60V are possible, then additional external
protection is required. Use a protection device with the lowest
clamping voltage acceptable for the application, and remember
that TVS type devices typically clamp 5V to 10V above the
designated stand-off voltage (for example, a “54V TVS” clamps
between 60V and 66V).
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.
Wide Common-Mode Voltage (CMV) Tolerance
Improves Operating Range
The Rx functions with common-mode voltages as great as ±20V,
making them ideal for industrial or long networks where induced
voltages are a realistic concern.
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 ISL32450E,
ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E,
ISL32459E extended ±20V CMR allows for operation in
environments that would overwhelm lesser transceivers.
Additionally, the Rx will not phase invert (erroneously change
state) even with CMVs of ±25V or differential voltages as large as
40V.
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 (that is, an idle bus).
Receivers easily meet the data rates supported by the
corresponding driver, and most receiver outputs are tri-statable
through the active low RE input.
The Rx in the 250kbps and 1Mbps versions include noise filtering
circuitry to reject high frequency signals. The 1Mbps version
typically rejects pulses narrower than 50ns (equivalent to
20Mbps), while the 250kbps Rx rejects pulses below 150ns
(6.7Mbps). The 20Mbps versions have no Rx noise filtering.
FN7921 Rev.2.00
Aug 31, 2017
Page 13 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
terminated in its characteristic impedance at both ends. Stubs
connecting a transceiver to the main cable should be kept as
short as possible.
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.
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 through driver output
short-circuit current limits and on-chip thermal shutdown
circuitry.
The ISL32457E and ISL32459E simplify this task by including a
cable invert pin (INV) that allows the technician to invert the
polarity of the Rx input and the Tx output pins simply by moving a
jumper to change the state of the invert pin. When the invert pin
is low, the IC operates like any standard RS-485 transceiver, and
the bus pins have their normal polarity definition of A and Y as
noninverting and B and Z as inverting. With the invert pin high,
the corresponding bus pins reverse their polarity, so B and Z
become noninverting, and A and Y become inverting.
The driver output stages incorporate a double fold-back
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 fold-back current level (≈83mA) is set to ensure that the
driver never folds back when driving loads with common-mode
voltages up to ±20V. The very low second fold-back current
setting (≈13mA) minimizes power dissipation if the Tx is enabled
when a fault occurs.
Intersil’s unique cable invert function is superior to that found on
competing devices, because the Rx full fail-safe 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,
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
re-enable 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.
with the Rx inputs floating or shorted together (V = 0V), the Rx
ID
output remains high, regardless of the state of the invert pin.
Data Rate, Cables, and Terminations
RS-485/RS-422 are intended for network lengths up to 4000ft,
but the maximum system data rate decreases as the
Low Power Shutdown Mode
These BiCMOS transceivers all use a fraction of the power
required by competitive devices, but they (excluding ISL32457E
and ISL32459E) also include a shutdown feature that reduces
transmission length increases. High speed versions operating at
20Mbps can be used at lengths up to 150ft (46m), but the
distance can be increased to 328ft (100m) by operating them at
5Mbps. 1Mbps versions can operate at full data rates with
lengths up to 800ft (244m). Jitter is the limiting parameter at
faster data rates, and may limit the network to shorter lengths,
so employing encoded data streams (such as Manchester coded
or Return-to-Zero) may allow increased transmission distances.
The slow versions can operate at 115kbps or less at the full
4000ft (1220m) distance, or at 250kbps for lengths up to
3000ft (915m). DC cable attenuation is the limiting parameter,
so using better quality cables (such as 22 AWG) may allow
increased transmission distance.
the already low quiescent I to a 10μA trickle. These devices
CC
enter shutdown whenever the receiver and driver are
simultaneously disabled (RE = V and DE = GND) for a period of
CC
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 12, 13, 14,
15, and 16, at the end of the “Electrical Specifications” table on
page 10 for more information.
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.
To minimize reflections, proper termination is imperative when
using the 20Mbps devices. Short networks using the 250kbps
versions need not be terminated; however, terminations are
recommended unless power dissipation is an overriding concern.
In point-to-point or point-to-multireceiver (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 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
FN7921 Rev.2.00
Aug 31, 2017
Page 14 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Typical Performance Curves
T
= +25°C; unless otherwise specified.
A
3.25
3.00
2.75
80
R
= 20Ω
V
= 5V
D
R
= 30Ω
CC
D
70
60
50
40
30
20
10
0
+25°C
R
= 100Ω
D
R
= 54Ω
D
+85°C
+25°C
V
= 5V
CC
2.50
2.25
2.00
1.75
1.50
1.25
R
= 54Ω
D
+85°C
R
= 100Ω
D
R
V
= 100Ω
D
= 3.3V
CC
V
= 5V
CC
R
= 54Ω
D
V
= 3.3V
CC
V
= 3.3V
CC
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
DIFFERENTIAL OUTPUT VOLTAGE (V)
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80
TEMPERATURE (°C)
85
FIGURE 12. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT
VOLTAGE
FIGURE 13. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
2.2
80
V
, +25°C
DE = V , RE = X
CC
OL
2.1
V
= 5V
CC
60
40
20
0
V
V
= 5V
CC
V
OL
, +85°C
2.0
1.9
1.8
1.7
1.6
1.5
1.4
DE = GND, RE = GND
V
, +25°C
OL
V
= 3.3V
CC
V
, +85°C
OL
= 5V
CC
DE = V , RE = X
CC
V
= 3.3V
CC
V
, +85°C
OH
-20
-40
-60
V
= 5V
CC
V
= 3.3V
= 3.3V
CC
V
, +25°C
OH
DE = GND, RE = GND
V
, +85°C
OH
V
, +25°C
OH
V
CC
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 85
TEMPERATURE (°C)
0
0.5 1.0
1.5 2.0
2.5 3.0
3.5 4.0
4.5 5.0
RECEIVER OUTPUT VOLTAGE (V)
FIGURE 15. RECEIVER OUTPUT CURRENT vs RECEIVER OUTPUT
VOLTAGE
FIGURE 14. SUPPLY CURRENT vs TEMPERATURE
1000
800
600
400
200
0
150
V
= 5V, +25°C
V
= 5V, +85°C
V
= 0V TO 5.5V
CC
CC
CC
125
100
75
V
= 3.3V, +25°C
V
= 3.3V, +85°C
CC
CC
Y OR Z = LOW
50
25
0
Y OR Z
-25
-50
-75
-100
-125
-200
-400
-600
V
= 3.3V, +25°C
= 3.3V, +85°C
CC
Y OR Z = HIGH
= 5V, +85°C
V
CC
A/Y OR B/Z
V
V
= 5V, +25°C
CC
CC
-70 -60 -50 -40 -30 -20 -10
0
10 20 30 40 50 60 70
-60 -50 -40 -30 -20 -10
0
10 20 30 40 50 60
BUS PIN VOLTAGE (V)
OUTPUT VOLTAGE (V)
FIGURE 16. BUS PIN CURRENT vs BUS PIN VOLTAGE
FIGURE 17. DRIVER OUTPUT CURRENT vs SHORT-CIRCUIT VOLTAGE
FN7921 Rev.2.00
Aug 31, 2017
Page 15 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Typical Performance Curves
T
= +25°C; unless otherwise specified. (Continued)
A
300
7
6
5
R
= 54Ω, C = 50pF
D
D
290
280
270
260
250
240
230
220
210
200
t
PHL
V
= 3.3V
CC
t
PLH
V
= 5V
CC
4
3
2
1
0
t
PLH
V
= 3.3V
CC
V
= 5V
CC
t
PHL
|t |
- t
PLH PHL
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 85
0
-40 -30 -20 -10
10 20 30 40 50 60 70 80 85
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 19. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE
(ISL32450E, ISL32452E, ISL32457E)
FIGURE 18. DRIVER DIFFERENTIAL PROPAGATION DELAY vs
TEMPERATURE (ISL32450E, ISL32452E, ISL32457E)
75
4.5
4.0
R
= 54Ω, C = 50pF
D
D
t
PLH
V
= 5V
CC
70
65
60
55
50
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
= 3.3V
t
CC
PHL
t
V
= 3.3V
PLH
CC
V
= 5V
CC
t
PHL
|t |
- t
PLH PHL
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 85
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 85
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 21. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE
(ISL32453E, ISL32455E)
FIGURE 20. DRIVER DIFFERENTIAL PROPAGATION DELAY vs
TEMPERATURE (ISL32453E, ISL32455E)
35
4.0
3.5
R
= 54Ω, C = 50pF
D
D
30
25
20
15
10
5
t
PLH
V
= 5V
CC
3.0
2.5
2.0
1.5
1.0
0.5
0
t
PLH
V
= 3.3V
t
CC
PHL
V
= 5V
CC
t
PHL
V
= 3.3V
CC
|t |
- t
PLH PHL
0
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 85
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 85
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 23. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE
(ISL32458E, ISL32459E)
FIGURE 22. DRIVER DIFFERENTIAL PROPAGATION DELAY vs
TEMPERATURE (ISL32458E, ISL32459E)
FN7921 Rev.2.00
Aug 31, 2017
Page 16 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Typical Performance Curves
T
= +25°C; unless otherwise specified. (Continued)
A
A
A
20
20
B
B
V
= ±1V
V
= ±1V
15
10
5
15
10
5
ID
250kbps
ID
1Mbps
V
= 5V
V
= 5V
CC
CC
RO
RO
RO
RO
V
= 3.3V
V
= 3.3V
CC
CC
0
0
V
= 5V
V
= 5V
CC
CC
5
0
5
0
V
= 3.3V
V
= 3.3V
CC
CC
-5
-5
-10
-15
-20
-10
-15
-20
A
B
A
B
TIME (1μs/DIV)
TIME (400ns/DIV)
FIGURE 24. ±20V RECEIVER PERFORMANCE (ISL32450E,
ISL32452E, ISL32457E)
FIGURE 25. ±20V RECEIVER PERFORMANCE (ISL32453E,
ISL32455E)
A
R
= 54Ω, C = 50pF
D
20
D
B
3
0
V
= ±1V
15
10
5
ID
20Mbps
DI
V
= 5V
CC
3
0
RO
RO
V
= 3.3V
RO
CC
0
V
= 5V
CC
2
5
0
V
= 3.3V
CC
1
0
-5
-10
-15
-20
A/Y - B/Z
-1
-2
A
B
TIME (1μs/DIV)
TIME (20ns/DIV)
FIGURE 26. ±20V RECEIVER PERFORMANCE (ISL32458E,
ISL32459E)
FIGURE 27. V = 3.3V, DRIVER AND RECEIVER WAVEFORMS
CC
(ISL32450E, ISL32452E, ISL32457E)
R
= 54Ω, C = 50pF
R = 54Ω, C = 50pF
D D
D
D
3
0
3
0
DI
DI
3
0
3
0
RO
RO
2
2
1
0
1
0
A/Y - B/Z
A/Y - B/Z
-1
-2
-1
-2
TIME (400ns/DIV)
TIME (20ns/DIV)
FIGURE 28. V = 3.3V, DRIVER AND RECEIVER WAVEFORMS
CC
FIGURE 29. V = 3.3V, DRIVER AND RECEIVER WAVEFORMS
CC
(ISL32453E, ISL32455E)
(ISL32458E, ISL32459E)
FN7921 Rev.2.00
Aug 31, 2017
Page 17 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
Typical Performance Curves
T
= +25°C; unless otherwise specified. (Continued)
A
R
= 54Ω, C = 50pF
D
R
= 54Ω, C = 50pF
D
D
D
5
0
5
DI
DI
0
5
5
0
RO
RO
0
3
2
1
0
3
2
1
0
A/Y - B/Z
A/Y - B/Z
-1
-1
-2
-3
-2
-3
TIME (400ns/DIV)
TIME (1μs/DIV)
FIGURE 31. V = 5V, DRIVER AND RECEIVER WAVEFORMS
CC
FIGURE 30. V = 5V, DRIVER AND RECEIVER WAVEFORMS
CC
(ISL32453E, ISL32455E)
(ISL32450E, ISL32452E, ISL32457E)
2.4
2.2
R
= 54Ω, C = 50pF
D
D
5
0
DI
V
= 5V
2.0
1.8
1.6
1.4
1.2
1.0
CC
5
0
RO
V
= 3.3V
CC
3
2
1
0
-1
-2
-3
A/Y - B/Z
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80
85
TEMPERATURE (°C)
TIME (20ns/DIV)
FIGURE 33. LOGIC INPUT HIGH VOLTAGE vs TEMPERATURE
FIGURE 32. V = 5V, DRIVER AND RECEIVER WAVEFORMS
CC
(ISL32458E, ISL32459E)
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
PROCESS:
Si Gate BiCMOS
FN7921 Rev.2.00
Aug 31, 2017
Page 18 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
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
FN7921.2
FN7921.1
CHANGE
August 31, 2017
December 1, 2015
Updated the receiving truth table on page 3.
Added 20Mbps versions (ISL32458E and ISL32459E) to datasheet.
Replaced Products section with About Intersil verbiage.
Updated Package Outline Drawing M10.118 to the latest version. Changes are as follows:
-Updated to new POD template. Added land pattern.
February 20, 2012
FN7921.0
Initial release
About Intersil
Intersil Corporation is a leading provider of innovative power management and precision analog solutions. The company's products
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, see the respective product information
page found at www.intersil.com.
For a listing of definitions and abbreviations of common terms used in our documents, visit www.intersil.com/glossary.
You can report errors or suggestions for improving this datasheet by visiting www.intersil.com/ask.
Reliability reports are also available from our website at www.intersil.com/support.
© Copyright Intersil Americas LLC 2012-2017. All Rights Reserved.
All trademarks and registered trademarks are the property of their respective owners.
For additional products, see www.intersil.com/en/products.html
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
subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com
FN7921 Rev.2.00
Aug 31, 2017
Page 19 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
For the most recent package outline drawing, see M8.118.
Package Outline Drawings
M8.118
8 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE
Rev 4, 7/11
5
3.0±0.05
A
DETAIL "X"
D
8
1.10 MAX
SIDE VIEW 2
0.09 - 0.20
4.9±0.15
3.0±0.05
5
0.95 REF
PIN# 1 ID
1
2
B
0.65 BSC
GAUGE
PLANE
TOP VIEW
0.25
3°±3°
0.55 ± 0.15
DETAIL "X"
0.85±010
H
C
SEATING PLANE
0.10 C
0.25 - 0.36
0.10 ± 0.05
0.08 C A-B D
M
SIDE VIEW 1
(5.80)
NOTES:
1. Dimensions are in millimeters.
(4.40)
(3.00)
2. Dimensioning and tolerancing conform to JEDEC MO-187-AA
and AMSEY14.5m-1994.
3. Plastic or metal protrusions of 0.15mm max per side are not
included.
(0.65)
4. Plastic interlead protrusions of 0.15mm max per side are not
included.
(0.40)
(1.40)
5. Dimensions are measured at Datum Plane "H".
6. Dimensions in ( ) are for reference only.
TYPICAL RECOMMENDED LAND PATTERN
FN7921 Rev.2.00
Aug 31, 2017
Page 20 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
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
AREA
6.20 (0.244)
5.80 (0.228)
0.50 (0.20)
x 45°
0.25 (0.01)
4.00 (0.157)
3.80 (0.150)
8°
0°
1
2
3
0.25 (0.010)
0.19 (0.008)
SIDE VIEW “B”
TOP VIEW
2.20 (0.087)
1
8
SEATING PLANE
0.60 (0.023)
1.27 (0.050)
1.75 (0.069)
5.00 (0.197)
4.80 (0.189)
2
3
7
6
1.35 (0.053)
-C-
4
5
0.25(0.010)
0.10(0.004)
1.27 (0.050)
0.51(0.020)
0.33(0.013)
5.20(0.205)
SIDE VIEW “A
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.
FN7921 Rev.2.00
Aug 31, 2017
Page 21 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
M10.118
10 LEAD MINI SMALL OUTLINE PLASTIC PACKAGE
For the most recent package outline drawing, see M10.118.
Rev 1, 4/12
5
3.0±0.05
A
DETAIL "X"
D
10
1.10 MAX
SIDE VIEW 2
0.09 - 0.20
4.9±0.15
3.0±0.05
5
0.95 REF
PIN# 1 ID
1
2
0.50 BSC
B
GAUGE
PLANE
TOP VIEW
0.25
3°±3°
0.55 ± 0.15
DETAIL "X"
0.85±010
H
C
SEATING PLANE
0.10 C
0.18 - 0.27
0.10 ± 0.05
0.08 C A-B D
M
SIDE VIEW 1
(5.80)
NOTES:
1. Dimensions are in millimeters.
(4.40)
(3.00)
2. Dimensioning and tolerancing conform to JEDEC MO-187-BA
and AMSEY14.5m-1994.
3. Plastic or metal protrusions of 0.15mm max per side are not
included.
(0.50)
4. Plastic interlead protrusions of 0.15mm max per side are not
included.
5. Dimensions are measured at Datum Plane "H".
6. Dimensions in ( ) are for reference only.
(0.29)
(1.40)
TYPICAL RECOMMENDED LAND PATTERN
FN7921 Rev.2.00
Aug 31, 2017
Page 22 of 23
ISL32450E, ISL32452E, ISL32453E, ISL32455E, ISL32457E, ISL32458E, ISL32459E
For the most recent package outline drawing, see M14.15.
M14.15
14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
Rev 1, 10/09
4
0.10 CA-B 2X
8.65
A
3
6
DETAIL"A"
0.22±0.03
D
14
8
6.0
3.9
4
0.10 C D 2X
0.20 C 2X
7
PIN NO.1
ID MARK
(0.35) x 45°
4° ± 4°
5
0.31-0.51
0.25M C A-B D
B
3
6
TOP VIEW
0.10 C
H
1.75 MAX
1.25 MIN
0.25
GAUGE PLANE
SEATING PLANE
C
0.10-0.25
1.27
0.10 C
SIDE VIEW
DETAIL "A"
(1.27)
(0.6)
NOTES:
1. Dimensions are in millimeters.
Dimensions in ( ) for Reference Only.
2. Dimensioning and tolerancing conform to AMSEY14.5m-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 indentifier may be either a mold or mark feature.
6. Does not include dambar protrusion. Allowable dambar protrusion
shall be 0.10mm total in excess of lead width at maximum condition.
(1.50)
7. Reference to JEDEC MS-012-AB.
TYPICAL RECOMMENDED LAND PATTERN
FN7921 Rev.2.00
Aug 31, 2017
Page 23 of 23
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