ISL32475EIBZ-T13 [RENESAS]
LINE TRANSCEIVER;
| 型号： | ISL32475EIBZ-T13 |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | LINE TRANSCEIVER 接口集成电路 |
| 文件： | 总19页 (文件大小：1029K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Fault Protected, Extended Common Mode Range,
RS-485/RS-422 Transceivers with ±16.5kV ESD
ISL32470E, ISL32472E, ISL32475E, ISL32478E
The ISL32470E, ISL32472E, ISL32475E, ISL32478E are
Features
fault-protected, extended common mode range differential
• Fault-Protected RS-485 Bus Pins. . . . . . . . . . . . . . Up to ±60V
transceivers that exceed the RS-485 and RS-422 standards for
balanced communication. The RS-485 bus pins (driver outputs
and receiver inputs) are fault protected against overvoltages up to
±60V and are protected against ±16.5kV ESD strikes without
latch-up. Additionally, these transceivers operate in environments
with common mode voltages up to ±15V (exceeds the RS-485
requirement), making this fault-protected RS-485 family one of
the more robust on the market.
• Extended Common Mode Range . . . . . . . . . . . . . . . . . . . ±15V
Larger Than Required for RS-485
• 1/4 Unit Load for Up to 128 Devices on the Bus
• ±16.5kV HBM ESD Protection on RS-485 Bus Pins
• High Transient Over-Voltage Tolerance . . . . . . . . . . . . . . .±80V
• Full Fail-Safe (Open, Short, Terminated) RS-485 Receivers
Transmitters (Tx) deliver an exceptional 2.5V (typical) differential
output voltage into the RS-485 specified 54Ω load. This yields
better noise immunity than standard RS-485 ICs or allows up to
six 120Ω terminations in star topologies.
• High Rx I for Opto-Couplers in Isolated Designs
OL
• Hot Plug Circuitry: Tx and Rx Outputs Remain Three-State
During Power-Up/Power-Down
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic high Rx output if Rx inputs are floating, shorted, or
on a terminated but undriven (idle) bus. Rx outputs feature high
• Choice of RS-485 Data Rates . . . . . . . . . . . .250kbps to 15Mbps
• Low Quiescent Supply Current . . . . . . . . . . . . . . . . . . . 2.3mA
• Ultra Low Shutdown Supply Current . . . . . . . . . . . . . . . . 10µA
drive levels; typically, 15mA @ V = 1V (to ease the design of
OL
opto-coupled isolated interfaces).
Applications
Half duplex (Rx inputs and Tx outputs multiplexed together) and
full duplex pinouts are available. See Table 1 on page 2 for key
features and configurations by device number.
• Utility Meters/Automated Meter Reading Systems
• High Node Count RS-485 Systems
For a fault-protected RS-485 transceiver with a ±25V extended
common mode range, please see the ISL32490E and ISL32483E
data sheets.
®
• PROFIBUS and RS-485 Based Field Bus Networks, and
Factory Automation
• Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks
20
15
12
V
= ±1V
ID
B
A
15
10
5
0
-7
RO
0
-15
-5
STANDARD RS-485
TRANSCEIVER
ISL3247xE
TIME (20ns/DIV)
FIGURE 1. EXCEPTIONAL Rx OPERATES AT >15Mbps EVEN WITH
±15V COMMON MODE VOLTAGE
FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON MODE
RANGE vs STANDARD RS-485 DEVICES
March 16, 2012
FN7784.1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2011, 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
1
ISL32470E, ISL32472E, ISL32475E, ISL32478E
TABLE 1. SUMMARY OF FEATURES
HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED?
HOT
PLUG?
QUIESCENT I
(mA)
LOW POWER
SHDN?
CC
PART NUMBER
ISL32470E
EN PINS?
Yes
PIN COUNT
Full
Half
Half
Half
0.25
0.25
1
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
2.3
2.3
2.3
2.3
Yes
Yes
Yes
Yes
14
8
ISL32472E
Yes
ISL32475E
Yes
8
ISL32478E
15
Yes
8
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL32470EIBZ
ISL32470 EIBZ
-40 to +85
-40 to +85
-40 to +85
-40 to +85
14 Ld SOIC
M14.15
ISL32472EIBZ
ISL32475EIBZ
ISL32478EIBZ
NOTES:
32472 EIBZ
32475 EIBZ
32478 EIBZ
8 Ld SOIC
8 Ld SOIC
8 Ld SOIC
M8.15
M8.15
M8.15
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte
tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil
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), please see device information pages for ISL32470E, ISL32472E, ISL32475E, ISL32478E. For more information on
MSL please see techbrief TB363.
Pin Configurations
ISL32472E, ISL32475E, ISL32478E
(8 LD SOIC)
ISL32470E
(14 LD SOIC)
TOP VIEW
TOP VIEW
NC
RO
1
2
3
4
5
6
7
14 VCC
13 NC
12 A
RO
RE
DE
DI
1
2
3
4
8
7
6
5
VCC
B/Z
R
D
R
D
RE
A/Y
DE
11 B
GND
DI
10 Z
GND
GND
9
8
Y
NC
FN7784.1
March 16, 2012
2
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Pin Descriptions
PIN
8 LD
14 LD
NAME
PIN #
PIN #
FUNCTION
RO
1
2
Receiver output. If A-B ≥ 10mV, RO is high; if A-B ≤ 200mV, RO is low; RO = High if A and B are unconnected (floating),
shorted together, or connected to an undriven, terminated bus.
RE
DE
2
3
3
4
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. They are high impedance when DE is
low. Internally pulled high.
DI
4
5
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
A/Y
5
6
6, 7
-
Ground connection.
±60V Fault and ±16.5kV HBM ESD Protected, RS-485/RS-422 level, non-inverting receiver input and non-inverting driver
output. Pin is an input if DE = 0; pin is an output if DE = 1.
B/Z
7
-
±60V Fault and ±16.5kV HBM ESD Protected, RS-485/RS-422 level, inverting receiver input and inverting driver output.
Pin is an input if DE = 0; pin is an output if DE = 1.
A
B
-
-
12
11
9
±60V Fault and ±15kV HBM ESD Protected, RS-485/RS-422 level, non-inverting receiver input.
±60V Fault and ±15kV HBM ESD Protected, RS-485/RS-422 level, inverting receiver input.
±60V Fault and ±15kV HBM ESD Protected, RS-485/RS-422 level, non-inverting driver output.
±60V Fault and ±15kV HBM ESD Protected, RS-485/RS-422 level, inverting driver output.
System power supply input (4.5V to 5.5V).
Y
-
Z
-
10
14
VCC
NC
8
-
1, 8, 13 No Internal Connection.
Truth Tables
TRANSMITTING
RECEIVING
INPUTS
INPUTS
OUTPUTS
OUTPUT
RO
RE
X
DE
1
DI
1
Z
0
1
Y
1
RE
DE
DE
Full Duplex
A-B
Half Duplex
0
0
0
0
0
0
X
X
X
≥ -0.01V
≤ -0.2V
1
0
1
X
1
0
0
0
0
X
High-Z
High-Z
Inputs
Open/Shorted
1
0
X
High-Z
(see Note)
High-Z
(see Note)
1
1
0
1
0
1
X
High-Z
(see Note)
NOTE: Low Power Shutdown Mode (see Note 11, page 9).
X
High-Z
NOTE: Low Power Shutdown Mode (see Note 11, page 9).
FN7784.1
March 16, 2012
3
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Typical Operating Circuits
+5V
+5V
+
+
0.1µF
0.1µF
13, 14
13, 14
V
V
CC
CC
R
T
9
A
B
12
11
Y
Z
DI
2
5
RO
R
10
D
3
4
RE
DE
4
3
DE
RE
R
10
9
11
12
Z
Y
B
A
T
RO
5
DI
2
R
D
GND
6, 7
GND
6, 7
ISL32470E FULL DUPLEX EXAMPLE
+5V
+5V
+
+
0.1µF
0.1µF
8
8
V
V
CC
CC
RO
1
2
4
DI
R
D
RE
DE
R
R
T
3
2
B/Z
A/Y
7
6
T
7
6
B/Z
A/Y
DE
RE
3
4
DI
1
RO
R
D
GND
5
GND
5
ISL32472E, ISL32475E, ISL32478E HALF DUPLEX EXAMPLE
FN7784.1
March 16, 2012
4
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Absolute Maximum Ratings
Thermal Information
V
to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Thermal Resistance (Typical)
8 Ld SOIC Package (Notes 4, 5) . . . . . . . . . .
14 Ld SOIC Package (Notes 4, 5) . . . . . . . . .
θ
(°C/W)
108
88
θ
JC
(°C/W)
47
39
CC
JA
Input Voltages
DI, DE, RE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -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
Maximum Junction Temperature (Plastic Package). . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . . . . .-65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
(Transient Pulse Through 100Ω, Note 15). . . . . . . . . . . . . . . . . . . ±80V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V +0.3V)
CC
Short Circuit Duration
Recommended Operating Conditions
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite
ESD Rating . . . . . . . . . . . . . . . . . . . . see “ESD PERFORMANCE” on page 6
Latch-up (per JESD78, Level 2, Class A) . . . . . . . . . . . . . . . . . . . . . +125°C
Supply Voltage (V ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V
CC
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
Bus Pin Common Mode Voltage Range. . . . . . . . . . . . . . . . . . -15V to +15V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTES:
4. θ is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
JA
5. For θ , the “case temp” location is taken at the package top center.
JC
Electrical Specifications Test Conditions: V = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are V = 5V, T = +25°C
CC
CC
A
(Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C.
TEMP
(°C)
MIN
(Note 14)
MAX
(Note 14)
PARAMETER
SYMBOL
TEST CONDITIONS
TYP
UNITS
DC CHARACTERISTICS
Driver Differential V
(No load)
(Loaded,
V
V
Full
Full
Full
Full
Full
-
-
V
V
V
V
V
OUT
OD1
CC
Driver Differential V
Figure 3A)
R = 100Ω (RS-422)
2.4
1.5
2.0
0.8
3.2
2.5
2.5
1.3
-
OUT
OD2
L
R = 54Ω (RS-485)
L
CC
-
R = 54Ω (PROFIBUS, V ≥ 5V)
CC
L
R = 21Ω (Six 120Ω terminations for Star
-
V
V
L
Configurations, V ≥ 4.75V)
CC
Change in Magnitude of Driver
Differential V for
ΔV
R = 54Ω or 100Ω (Figure 3A)
Full
-
-
0.2
OD
L
OUT
Complementary Output States
Driver Differential V
with
V
R = 60Ω, -7V ≤ V ≤ 12V
CM
Full
Full
Full
1.5
1.7
-1
2.1
2.3
-
V
V
V
V
OUT
Common Mode Load (Figure 3B)
OD3
L
CC
R = 60Ω, -15V ≤ V ≤ 15V (V ≥ 4.75V)
CM CC
-
L
Driver Common-Mode V
3A)
(Figure
V
R = 54Ω or 100Ω
3
OUT
OC
L
Change in Magnitude of Driver
Common-Mode V for
ΔV
R = 54Ω or 100Ω (Figure 3A)
Full
-
-
0.2
V
OC
L
OUT
Complementary Output States
Driver Short-Circuit Current
I
DE = V , -15V ≤ V ≤ 15V (Note 8)
CC
Full
Full
Full
Full
Full
Full
Full
-250
-83
-13
2.5
-
-
-
250
83
13
-
mA
mA
mA
V
OSD
O
I
I
At First Foldback, 22V ≤ V ≤ -22V
O
OSD1
OSD2
At Second Foldback, 35V ≤ V ≤ -35V
-
O
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Current
V
DE, DI, RE
DE, DI, RE
DI
-
IH
V
-
0.8
1
V
IL
I
-1
-
µA
µA
IN1
DE, RE
-15
6
15
FN7784.1
March 16, 2012
5
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Electrical Specifications Test Conditions: V = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are V = 5V, T = +25°C
CC
CC
A
(Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
TEMP
MIN
MAX
PARAMETER
SYMBOL
TEST CONDITIONS
(°C)
Full
Full
Full
Full
(Note 14)
TYP
(Note 14)
UNITS
µA
Input/Output Current (A/Y, B/Z)
I
DE = 0V, V = 0V or
CC
V
V
V
V
= 12V
= -7V
-
110
-75
250
-
IN2
IN
IN
IN
IN
5.5V
-200
-800
-6
µA
= ±15V
±240
±0.5
800
6
µA
= ±60V
mA
(Note 16)
Input Current (A, B)
(Full Duplex Versions Only)
I
V
= 0V or 5.5V
V
V
V
V
= 12V
= -7V
Full
Full
Full
Full
-
90
-70
125
-
µA
µA
µA
mA
IN3
CC
IN
IN
IN
IN
-100
-500
-3
= ±15V
±200
±0.4
500
3
= ±60V
(Note 16)
Output Leakage Current (Y, Z)
(Full Duplex Versions Only)
I
RE = 0V, DE = 0V,
= 0V or 5.5V
V
V
V
V
= 12V
= -7V
Full
Full
Full
Full
-
20
-5
200
-
µA
µA
µA
mA
OZD
IN
IN
IN
IN
V
CC
-100
-500
-3
= ±15V
±40
±0.1
500
3
= ±60V
(Note 16)
Receiver Differential Threshold
Voltage
V
-15V ≤ V ≤ 15V
CM
Full
-200
-
-100
-10
mV
TH
Receiver Input Hysteresis
ΔV
-15V ≤ V ≤ 15V
CM
25
25
4.75
4.2
-
mV
V
TH
Receiver Output High Voltage
V
I
I
I
= -2mA, V = -10mV
ID
Full
Full
Full
Full
Full
V
- 0.5
-
OH
O
O
O
CC
= -8mA, V = -10mV
ID
2.8
-
0.4
-
V
Receiver Output Low Voltage
Receiver Output Low Current
V
= 6mA, V = -200mV
ID
-
0.27
22
V
OL
I
V
= 1V, V = -200mV
ID
15
-1
mA
µA
OL
O
Three-State (High Impedance)
Receiver Output Current
I
0V ≤ V ≤ V
0.01
1
OZR
O
CC
Receiver Short-Circuit Current
SUPPLY CURRENT
I
0V ≤ V ≤ V
Full
±12
-
±110
mA
OSR
O
CC
No-Load Supply Current (Note 7)
I
DE = V , RE = 0V or V
DI = 0V or V
CC
,
Full
Full
-
-
2.3
10
4.5
50
mA
µA
CC
CC CC
Shutdown Supply Current
ESD PERFORMANCE
I
DE = 0V, RE = V , DI = 0V or V
CC CC
SHDN
RS-485 Pins (A, Y, B, Z, A/Y, B/Z)
Human Body Model, 1/2 Duplex
From Bus Pins to
25
25
-
-
±16.5
±15
-
-
kV
kV
Full Duplex
GND
All Pins
Human Body Model, per JEDEC
Machine Model
25
25
-
-
±8
-
-
kV
V
±700
DRIVER SWITCHING CHARACTERISTICS (250kbps Versions; ISL32470E and ISL32472E)
Driver Differential Output Delay
Driver Differential Output Skew
Driver Differential Rise or Fall Time
t
, t
R
R
R
= 54Ω, C = 50pF (Figure 4)
Full
Full
Full
-
-
320
6
450
30
ns
ns
ns
PLH PHL
D
D
D
D
t
= 54Ω, C = 50pF (Figure 4)
D
SKEW
t , t
= 54Ω, C = 50pF (Figure 4)
400
650
1200
R
F
D
FN7784.1
March 16, 2012
6
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Electrical Specifications Test Conditions: V = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are V = 5V, T = +25°C
CC
CC
A
(Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
TEMP
MIN
MAX
PARAMETER
Maximum Data Rate
SYMBOL
TEST CONDITIONS
= 820pF (Figure 6)
D
(°C)
Full
Full
Full
Full
Full
Full
Full
(Note 14)
TYP
(Note 14)
UNITS
Mbps
ns
f
C
0.25
1.5
-
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 5), (Note 9)
SW = V (Figure 5), (Note 9)
-
-
1200
1200
120
ZH
t
t
-
-
ns
ZL
LZ
HZ
CC
SW = V (Figure 5)
CC
-
-
ns
t
SW = GND (Figure 5)
(Note 11)
-
60
-
-
160
-
120
ns
t
600
ns
SHDN
Driver Enable from Shutdown to
Output High
t
SW = GND (Figure 5), (Notes 11, 12)
2500
ns
ZH(SHDN)
Driver Enable from Shutdown to
Output Low
t
SW = V (Figure 5), (Notes 11, 12)
CC
Full
-
-
2500
ns
ZL(SHDN)
DRIVER SWITCHING CHARACTERISTICS (1Mbps Versions; ISL32475E)
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 4)
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
-
70
125
15
ns
ns
PLH PHL
D
D
D
D
D
t
= 54Ω, C = 50pF (Figure 4)
-
4.5
SKEW
D
t , t
= 54Ω, C = 50pF (Figure 4)
70
170
300
-
ns
R
F
D
f
C
= 820pF (Figure 6)
1
4
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 5), (Note 9)
SW = V (Figure 5), (Note 9)
-
-
350
300
120
120
600
2000
ZH
t
-
-
ns
ZL
LZ
HZ
CC
t
SW = V (Figure 5)
CC
-
-
ns
t
SW = GND (Figure 5)
(Note 11)
-
60
-
-
160
-
ns
t
ns
SHDN
Driver Enable from Shutdown to
Output High
t
SW = GND (Figure 5), (Notes 11, 12)
ns
ZH(SHDN)
Driver Enable from Shutdown to
Output Low
t
SW = V (Figure 5), (Notes 11, 12)
CC
Full
-
-
2000
ns
ZL(SHDN)
DRIVER SWITCHING CHARACTERISTICS (15Mbps Versions; ISL32478E)
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 4)
Full
Full
Full
Full
Full
Full
Full
Full
Full
Full
-
21
45
6
ns
ns
PLH PHL
D
D
D
D
D
t
= 54Ω, C = 50pF (Figure 4)
-
3
SKEW
D
t , t
= 54Ω, C = 50pF (Figure 4)
5
17
30
ns
R
F
D
f
C
= 470pF (Figure 6)
15
25
-
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 5), (Note 9)
-
-
100
100
120
120
600
2000
ZH
t
SW = V (Figure 5), (Note 9)
CC
-
-
ns
ZL
LZ
HZ
t
SW = V (Figure 5)
CC
-
-
ns
t
SW = GND (Figure 5)
(Note 11)
-
60
-
-
160
-
ns
t
ns
SHDN
Driver Enable from Shutdown to
Output High
t
SW = GND (Figure 5), (Notes 11, 12)
ns
ZH(SHDN)
Driver Enable from Shutdown to
Output Low
t
SW = V (Figure 5), (Notes 11, 12)
CC
Full
-
-
2000
ns
ZL(SHDN)
FN7784.1
March 16, 2012
7
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Electrical Specifications Test Conditions: V = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are V = 5V, T = +25°C
CC
CC
A
(Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
TEMP
MIN
MAX
PARAMETER
SYMBOL
TEST CONDITIONS
(°C)
(Note 14)
TYP
(Note 14)
UNITS
RECEIVER SWITCHING CHARACTERISTICS (250kbps Versions; ISL32470E and ISL32472E)
Maximum Data Rate
f
(Figure 7)
(Figure 7)
(Figure 7)
Full
Full
Full
Full
0.25
5
200
4
-
Mbps
ns
MAX
Receiver Input to Output Delay
Receiver Skew |tPLH - tPHL|
Receiver Enable to Output Low
t
PLH PHL
, t
-
-
-
280
10
50
t
ns
SKD
t
R = 1kΩ, C = 15pF, SW = V (Figure 8),
-
ns
ZL
L
L
CC
(Note 10)
Receiver Enable to Output High
t
R = 1kΩ, C = 15pF, SW = GND (Figure 8),
Full
-
-
50
ns
ZH
L
L
(Note 10)
Receiver Disable from Output Low
Receiver Disable from Output High
Time to Shutdown
t
R = 1kΩ, C = 15pF, SW = V (Figure 8)
CC
Full
Full
Full
Full
-
-
50
50
ns
ns
ns
ns
LZ
L
L
t
R = 1kΩ, C = 15pF, SW = GND (Figure 8)
-
60
-
-
160
-
HZ
L
L
t
(Note 11)
600
2000
SHDN
Receiver Enable from Shutdown to
Output High
t
R = 1kΩ, C = 15pF, SW = GND (Figure 8),
L L
(Notes 11, 13)
ZH(SHDN)
Receiver Enable from Shutdown to
Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 8),
(Notes 11, 13)
Full
-
-
2000
ns
ZL(SHDN)
L
L
CC
RECEIVER SWITCHING CHARACTERISTICS (1Mbps Versions; ISL32475E)
Maximum Data Rate
f
(Figure 7)
(Figure 7)
(Figure 7)
Full
Full
Full
Full
1
-
15
90
4
-
Mbps
ns
MAX
Receiver Input to Output Delay
t
PLH PHL
, t
150
10
50
Receiver Skew |t
- tPH|
t
-
ns
PLH
SKD
Receiver Enable to Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 8),
-
-
ns
ZL
L
L
CC
(Note 10)
Receiver Enable to Output High
t
R = 1kΩ, C = 15pF, SW = GND (Figure 8),
Full
-
-
50
ns
ZH
L
L
(Note 10)
Receiver Disable from Output Low
Receiver Disable from Output High
Time to Shutdown
t
R = 1kΩ, C = 15pF, SW = V (Figure 8)
CC
Full
Full
Full
Full
-
-
50
50
ns
ns
ns
ns
LZ
L
L
t
R = 1kΩ, C = 15pF, SW = GND (Figure 8)
-
60
-
-
160
-
HZ
L
L
t
(Note 11)
600
2000
SHDN
Receiver Enable from Shutdown to
Output High
t
R = 1kΩ, C = 15pF, SW = GND (Figure 8),
L L
(Notes 11, 13)
ZH(SHDN)
Receiver Enable from Shutdown to
Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 8),
(Notes 11, 13)
Full
-
-
2000
ns
ZL(SHDN)
L
L
CC
RECEIVER SWITCHING CHARACTERISTICS (15Mbps Versions; ISL32478E)
Maximum Data Rate
f
(Figure 7)
(Figure 7)
(Figure 7)
Full
Full
Full
Full
15
25
35
4
-
Mbps
ns
MAX
Receiver Input to Output Delay
t
, t
-
-
-
70
10
50
PLH PHL
Receiver Skew |t
- t
PLH PHL
|
t
ns
SKD
Receiver Enable to Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 8),
-
ns
ZL
L
L
CC
(Note 10)
Receiver Enable to Output High
t
R = 1kΩ, C = 15pF, SW = GND (Figure 8),
Full
-
-
50
ns
ZH
L
L
(Note 10)
Receiver Disable from Output Low
Receiver Disable from Output High
t
R = 1kΩ, C = 15pF, SW = V (Figure 8)
CC
Full
Full
-
-
-
-
50
50
ns
ns
LZ
L
L
t
R = 1kΩ, C = 15pF, SW = GND (Figure 8)
L L
HZ
FN7784.1
March 16, 2012
8
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Electrical Specifications Test Conditions: V = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are V = 5V, T = +25°C
CC
CC
A
(Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued)
TEMP
MIN
MAX
PARAMETER
Time to Shutdown
SYMBOL
TEST CONDITIONS
(°C)
Full
Full
(Note 14)
TYP
(Note 14)
UNITS
ns
t
(Note 11)
R = 1kΩ, C = 15pF, SW = GND (Figure 8),
60
-
160
-
600
SHDN
Receiver Enable from Shutdown to
Output High
t
2000
ns
ZH(SHDN)
L
L
(Notes 11, 13)
Receiver Enable from Shutdown to
Output Low
t
R = 1kΩ, C = 15pF, SW = V (Figure 8),
CC
(Notes 11, 13)
Full
-
-
2000
ns
ZL(SHDN)
L
L
NOTES:
6. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise
specified.
7. Supply current specification is valid for loaded drivers when DE = 0V.
8. Applies to peak current. See “Typical Performance Curves” beginning on page 13 for more information.
9. Keep RE = 0 to prevent the device from entering SHDN.
10. The RE signal high time must be short enough (typically <100ns) to prevent the device from entering SHDN.
11. 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 13.
12. Keep RE = V , and set the DE signal low time >600ns to ensure that the device enters SHDN.
CC
13. Set the RE signal high time >600ns to ensure that the device enters SHDN.
14. Compliance to data sheet limits is assured by one or more methods: production test, characterization and/or design.
15. Tested according to TIA/EIA-485-A, Section 4.2.6 (±80V for 15µs at a 1% duty cycle).
16. See “Caution” statement below the “Recommended Operating Conditions” section on page 5.
Test Circuits and Waveforms
R /2
L
R /2
375Ω
375Ω
DE
DI
L
V
DE
DI
CC
V
CC
Z
Y
Z
Y
V
CM
V
D
OD
V
D
OD
V
OC
V
R /2
L
OC
R /2
L
FIGURE 3A. V AND V
OD
FIGURE 3B. V AND V WITH COMMON MODE LOAD
OD OC
OC
FIGURE 3. DC DRIVER TEST CIRCUITS
FN7784.1
March 16, 2012
9
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Test Circuits and Waveforms(Continued)
3V
0V
DI
1.5V
1.5V
DE
DI
V
t
t
PHL
CC
PLH
Z
Y
V
OH
OUT (Z)
OUT (Y)
C
R
D
D
D
V
OL
SIGNAL
GENERATOR
+V
-V
OD
90%
10%
90%
10%
DIFF OUT (Y - Z)
OD
t
t
R
F
SKEW = |t
- t |
PLH PHL
FIGURE 4A. TEST CIRCUIT
FIGURE 4B. MEASUREMENT POINTS
FIGURE 4. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES
DE
DI
Z
Y
110Ω
V
CC
3V
D
GND
DE
1.5V
1.5V
SW
SIGNAL
GENERATOR
(Note 11)
C
0V
L
t
, t
ZH ZH(SHDN)
(Note 11)
t
HZ
OUTPUT HIGH
V
OH
V
- 0.5V
OH
OUT (Y, Z)
2.3V
0V
PARAMETER
OUTPUT
Y/Z
RE
X
DI
SW
GND
C (pF)
L
t
1/0
0/1
1/0
0/1
1/0
0/1
50
t
, t
t
ZL ZL(SHDN)
HZ
LZ
(Note 11)
V
CC
OL
t
Y/Z
X
V
50
LZ
CC
OUT (Y, Z)
2.3V
OUTPUT LOW
t
Y/Z
0 (Note 9)
0 (Note 9)
1 (Note 12)
1 (Note 12)
GND
100
100
100
100
ZH
V
+ 0.5V
OL
V
t
Y/Z
V
ZL
CC
t
Y/Z
GND
ZH(SHDN)
t
Y/Z
V
CC
ZL(SHDN)
FIGURE 5A. TEST CIRCUIT
FIGURE 5B. MEASUREMENT POINTS
FIGURE 5. DRIVER ENABLE AND DISABLE TIMES
DE
DI
3V
0V
V
CC
+
DI
Z
54Ω
C
V
D
D
OD
Y
-
SIGNAL
GENERATOR
+V
OD
DIFF OUT (Y - Z)
0V
-V
OD
FIGURE 6A. TEST CIRCUIT
FIGURE 6B. MEASUREMENT POINTS
FIGURE 6. DRIVER DATA RATE
FN7784.1
March 16, 2012
10
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Test Circuits and Waveforms(Continued)
B
A
750mV
RE
15pF
0V
0V
B
RO
R
-750mV
A
t
t
PHL
PLH
SIGNAL
GENERATOR
SIGNAL
GENERATOR
V
CC
50%
50%
RO
V
0V
CM
FIGURE 7A. TEST CIRCUIT
FIGURE 7B. MEASUREMENT POINTS
FIGURE 7. RECEIVER PROPAGATION DELAY AND DATA RATE
RE
RE
B
A
1kΩ
V
3V
0V
CC
RO
R
(Note 11)
GND
1.5V
1.5V
SW
SIGNAL
GENERATOR
15pF
t
t
, t
ZH ZH(SHDN)
t
HZ
OUTPUT HIGH
(Note 11)
V
OH
V
- 0.5V
OH
PARAMETER
DE
0
A
SW
GND
1.5V
RO
t
t
t
t
t
t
+1.5V
-1.5V
+1.5V
-1.5V
+1.5V
-1.5V
HZ
0V
0
V
LZ
ZH
ZL
CC
, t
ZL ZL(SHDN)
t
LZ
(Note 11)
(Note 10)
(Note 10)
0
GND
V
CC
RO
1.5V
OUTPUT LOW
0
V
CC
V
+ 0.5V
V
OL
OL
(Note 13)
(Note 13)
0
GND
ZH(SHDN)
ZL(SHDN)
0
V
CC
FIGURE 8A. TEST CIRCUIT
FIGURE 8. RECEIVER ENABLE AND DISABLE TIMES
FIGURE 8B. MEASUREMENT POINTS
output voltages (V ) increase noise immunity, while the ±16.5kV
OD
built-in ESD protection complements the fault protection.
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.
Receiver (Rx) Features
These devices utilize a differential input receiver for maximum noise
immunity and common mode rejection. Input sensitivity is better
than ±200mV, as required by the RS-422 and RS-485 specifications.
Receiver input (load) current surpasses the RS-422 specification of
3mA and is four times lower than the RS-485 “Unit Load (UL)”
requirement of 1mA maximum. Thus, these products are known as
“one-quarter UL” transceivers, and there can be up to 128 of these
devices on a network while still complying with the RS-485 loading
specification.
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.
The Rx functions with common mode voltages as great as ±15V,
making them ideal for industrial or long networks where induced
voltages are a realistic concern.
All the receivers include a “full fail-safe” function that guarantees a
high-level receiver output if the receiver inputs are unconnected
(floating), shorted together, or connected to a terminated bus with all
the transmitters disabled (i.e., an idle bus).
The ISL32470E, ISL32472E, ISL32475E, ISL32478E is a family of
ruggedized RS-485 transceivers that improves on the RS-485 basic
requirements and therefore increases system reliability. The CMR
increases to ±15V, while the RS-485 bus pins (receiver inputs and
driver outputs) include fault protection against voltages and
transients up to ±60V. Additionally, larger-than-required differential
Rx outputs feature high drive levels (typically 22mA @ VOL = 1V) to
ease the design of optically coupled isolated interfaces.
FN7784.1
March 16, 2012
11
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Receivers easily meet the data rates supported by the corresponding
Another advantage of the large V is the ability to drive more than
OD
driver, and all receiver outputs are three-statable via the active low
RE input.
two bus terminations, which allows for utilizing the ISL32470E,
ISL32472E, ISL32475E, ISL32478E in “star” and other
multi-terminated, nonstandard network topologies. Figure 10 details
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 transmitter’s V vs I
characteristic and includes load lines
OD OUT
for four (30Ω) and six (20Ω) 120Ω terminations. Figure 10 shows
that the driver typically delivers ±1.3V into six terminations, and the
“Electrical Specifications” table guarantees a V of ±0.8V at 21Ω
OD
over the full temperature range. The RS-485 standard requires a
Driver (Tx) Features
minimum 1.5V V into two terminations, but the ISL32470E,
OD
The RS-485/RS-422 driver is a differential output device that
delivers at least 1.5V across a 54Ω load (RS-485) and at least 2.4V
across a 100Ω load (RS-422). The drivers feature low propagation
delay skew to maximize bit width and to minimize EMI, and all
drivers are three-statable via the active high DE input.
ISL32472E, ISL32475E, ISL32478E delivers RS-485 voltage levels
with two to three times the number of terminations.
Hot Plug Function
When a piece of equipment powers up, there is a period of time in
which the processor or ASIC driving the RS-485 control lines (DE, RE)
is unable to ensure that the RS-485 Tx and Rx outputs are kept
disabled. If the equipment is connected to the bus, a driver activating
prematurely during power-up may crash the bus. To avoid this
scenario, the ISL32470E, ISL32472E, ISL32475E, ISL32478E
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 ISL32478E drivers
are not limited; thus, faster output transition times allow data rates
of at least 15Mbps.
devices incorporate a “Hot Plug” function. Circuitry monitoring V
CC
High Overvoltage (Fault) Protection
Increases Ruggedness
ensures that, during power-up and power-down, the Tx and Rx outputs
remain disabled, regardless of the state of DE and RE, if V is less than
CC
≈3.5V. This gives the processor/ASIC a chance to stabilize and drive the
RS-485 control lines to the proper states. Figure 9 illustrates the
power-up and power-down performance of the ISL32470E, ISL32472E,
ISL32475E, ISL32478E compared to an RS-485 IC without the Hot Plug
feature.
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 ISL32470E, ISL32472E,
ISL32475E, ISL32478E perfect for applications where power
(e.g., 24V and 48V supplies) must be routed in the conduit with the
data lines, or for outdoor applications where large transients are likely to
occur. When power is routed with the data lines, even a momentary short
between the supply and data lines will destroy an unprotected device.
The ±60V fault levels of this family are at least five times higher than the
levels specified for standard RS-485 ICs. The ISL32470E, ISL32472E,
ISL32475E, ISL32478E protection is active whether the Tx is enabled or
disabled, and even if the IC is powered down.
DE, DI = V
RE = GND
CC
5.0
2.5
3.5V
2.8V
V
CC
0
5.0
2.5
0
R
R
= 1kΩ
= 1kΩ
L
L
If transients or voltages (including overshoots and ringing) greater
than ±60V are possible, then additional external protection is
required.
A/Y
ISL83088E
ISL3247xE
5.0
2.5
Wide Common Mode Voltage (CMV) Tolerance
Improves Operating Range
RO
ISL3247xE
0
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 ISL32470E, ISL32472E, ISL32475E,
ISL32478E has extended ±15V CMR, which allows for operation in
environments that would overwhelm lesser transceivers.
TIME
(40µs/DIV)
FIGURE 9. HOT PLUG PERFORMANCE (ISL3247xE) vs ISL83088E
WITHOUT HOT PLUG CIRCUITRY
ESD Protection
Additionally, the Rx will not phase invert (erroneously change state),
even with CMVs of ±40V or differential voltages as large as 40V.
All pins on these devices include class 3 (>8kV) Human Body Model
(HBM) ESD protection structures that are good enough to survive
ESD events commonly seen during manufacturing. Even so, the
RS-485 pins (driver outputs and receiver inputs) incorporate more
advanced structures, which allows them to survive ESD events in
excess of ±16.5kV HBM (±15kV for full-duplex versions). The
RS-485 pins are particularly vulnerable to ESD strikes 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,
High V Improves Noise Immunity and
OD
Flexibility
The ISL32470E, ISL32472E, ISL32475E, ISL32478E driver design
delivers larger differential output voltages (V ) than the RS-485
OD
standard requires or than most RS-485 transmitters can deliver. The
typical ±2.5V V provides more noise immunity than networks built
OD
using many other transceivers.
FN7784.1
March 16, 2012
12
ISL32470E, ISL32472E, ISL32475E, ISL32478E
and without interfering with the exceptional ±15V CMR. This built-in
Built-In Driver Overload Protection
ESD protection minimizes the need for board-level protection
structures (e.g., transient suppression diodes) and the associated,
undesirable capacitive load they present.
As stated previously, the RS-485 specification requires that drivers
survive worst-case bus contentions undamaged. These transceivers
meet this requirement via driver output short circuit current limits
and on-chip thermal shutdown circuitry.
Data Rate, Cables, and Terminations
The driver output stages incorporate a double foldback short circuit
current limiting scheme, which ensures that the output current never
exceeds the RS-485 specification, even at the common mode and
fault condition voltage range extremes. The first foldback current
level (≈70mA) is set to ensure that the driver never folds back when
driving loads with common mode voltages up to ±15V. The very low
second foldback current setting (≈9mA) minimizes power dissipation
if the Tx is enabled when a fault occurs.
RS-485/RS-422 are intended for network lengths up to 4000 feet,
but the maximum system data rate decreases as the transmission
length increases. Devices operating at 15Mbps may be used at
lengths up to 150 feet (46m), but the distance can be increased to
328 feet (100m) by operating at 10Mbps. The 1Mbps versions can
operate at full data rates with lengths up to 800 feet (244m). Jitter is
the limiting parameter at these faster data rates, so employing
encoded data streams (e.g., Manchester coded or Return-to-Zero)
may allow increased transmission distances. The slow versions can
operate at 115kbps or less at the full 4000-foot (1220m) distance,
or at 250kbps for lengths up to 3000 feet (915m). DC cable
attenuation is the limiting parameter, so using better-quality cables
(e.g., 22 AWG) may allow increased transmission distance.
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 by 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.
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.
Low Power Shutdown Mode
These BiCMOS transceivers all use a fraction of the power required
by competitive devices, but they also include a shutdown feature that
Proper termination is imperative, when using the 15Mbps devices, to
minimize reflections. Short networks using the 250kbps versions
need not be terminated; however, terminations are recommended
unless power dissipation is an overriding concern.
reduces the already low quiescent I to a 10µA trickle. These
CC
devices enter shutdown whenever the receiver and driver are
simultaneously disabled (RE = V and DE = GND) for a period of at
CC
In point-to-point or point-to-multipoint (single driver on bus like
RS-422) networks, the main cable should be terminated in its
characteristic impedance (typically 120Ω) at the end farthest from
the driver. In multi-receiver applications, stubs connecting receivers
to the main cable should be kept as short as possible. Multipoint
(multi-driver) systems require that the main cable be terminated in
its characteristic impedance at both ends. Stubs connecting a
transceiver to the main cable should be kept as short as possible.
least 600ns. Disabling both the driver and the receiver for less than
60ns guarantees that the transceiver will not enter shutdown.
Note that receiver and driver enable times increase when the
transceiver enables from shutdown. Refer to Notes 9, 10, 11, 12 and
13 on page 9, at the end of the “Electrical Specifications” table, for
more information.
Typical Performance Curves
V
= 5V, T = +25°C; Unless Otherwise Specified.
A
CC
3.6
90
R
= 20Ω
D
R
= 30Ω
D
80
70
60
50
40
30
20
10
0
3.4
+25°C
+85°C
R
= 100Ω
D
R
= 54Ω
D
3.2
3.0
2.8
2.6
2.4
2.2
R
= 100Ω
D
R
= 54Ω
D
0
1
2
3
4
5
-40
-25
0
25
50
75 85
DIFFERENTIAL OUTPUT VOLTAGE (V)
TEMPERATURE (°C)
FIGURE 11. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs
TEMPERATURE
FIGURE 10. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT
VOLTAGE
FN7784.1
March 16, 2012
13
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Typical Performance Curves
V
= 5V, T = +25°C; Unless Otherwise Specified. (Continued)
A
CC
70
60
2.45
2.40
V
, +25°C
OL
DE = V , RE = X
CC
V
, +85°C
OL
50
40
30
20
10
0
2.35
2.30
2.25
DE = GND, RE = GND
2.20
2.15
2.10
2.05
2.00
-10
-20
-30
V
, +85°C
1
OH
V
, +25°C
3
OH
-40
-25
0
25
50
75 85
0
2
4
5
TEMPERATURE (°C)
RECEIVER OUTPUT VOLTAGE (V)
FIGURE 12. SUPPLY CURRENT vs TEMPERATURE
FIGURE 13. RECEIVER OUTPUT CURRENT vs RECEIVER OUTPUT
VOLTAGE
1000
150
100
50
+85°C
V
= 0V to 5.5V
CC
800
600
400
200
0
Y OR Z = LOW
+25°C
0
Y or Z
-50
-100
-150
-200
-400
-600
Y OR Z = HIGH
+25°C
A/Y or B/Z
+85°C
-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 70
OUTPUT VOLTAGE (V)
BUS PIN VOLTAGE (V)
FIGURE 14. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT VOLTAGE
FIGURE 15. BUS PIN CURRENT vs BUS PIN VOLTAGE
8
7
6
5
4
3
2
1
0
340
R
= 54Ω, C = 50pF
R
= 54Ω, C = 50pF
D
D
D
D
335
330
325
320
315
310
305
300
t
PLH
t
PHL
|t
- t
|
PLH PHL
-40
0
50
85
-25
25
TEMPERATURE (°C)
75
-40
-25
0
25
50
75 85
TEMPERATURE (°C)
FIGURE 17. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE
(ISL32470E, ISL32472E)
FIGURE 16. DRIVER DIFFERENTIAL PROPAGATION DELAY vs
TEMPERATURE (ISL32470E, ISL32472E)
FN7784.1
March 16, 2012
14
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Typical Performance Curves
V
= 5V, T = +25°C; Unless Otherwise Specified. (Continued)
A
CC
4.0
85
R
= 54Ω, C = 50pF
D
R
= 54Ω, C = 50pF
D
D
D
80
75
70
65
60
55
50
3.5
3.0
2.5
2.0
t
PLH
t
PHL
|t
- t
|
PLH PHL
-40
-25
0
25
50
75 85
-40
-25
0
25
50
75 85
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 18. DRIVER DIFFERENTIAL PROPAGATION DELAY vs
TEMPERATURE (ISL32475E)
FIGURE 19. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE
(ISL32475E)
27
3.4
R
= 54Ω, C = 50pF
D
D
R
= 54Ω, C = 50pF
D
D
3.2
3.0
2.8
2.6
2.4
2.2
2.0
25
23
21
19
17
15
t
PLH
t
PHL
|t
- t
|
PLH PHL
-40
-25
0
25
50
75 85
-40
-25
0
25
50
75 85
TEMPERATURE (°C)
TEMPERATURE (°C)
FIGURE 20. DRIVER DIFFERENTIAL PROPAGATION DELAY vs
TEMPERATURE (ISL32478E)
FIGURE 21. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE
(ISL32478E)
A
A
15
15
B
B
V
= ±1V
V
= ±1V
ID
ID
10
5
10
5
RO
RO
RO
RO
0
0
5
0
5
0
-5
-5
-10
-15
-10
-15
A
B
A
B
TIME (400ns/DIV)
TIME (1µs/DIV)
FIGURE 22. RECEIVER PERFORMANCE WITH ±15V CMV
(ISL32470E, ISL32472E)
FIGURE 23. RECEIVER PERFORMANCE WITH ±15V CMV
(ISL32475E)
FN7784.1
March 16, 2012
15
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Typical Performance Curves
V
= 5V, T = +25°C; Unless Otherwise Specified. (Continued)
CC A
R
= 54Ω, C = 50pF
D
A
D
15
5
0
B
DI
V
= ±1V
ID
10
5
5
0
RO
RO
RO
0
3
2
5
0
1
A/Y - B/Z
-5
0
-10
-15
-1
-2
-3
A
B
TIME (1µs/DIV)
TIME (20ns/DIV)
FIGURE 25. DRIVER AND RECEIVER WAVEFORMS (ISL32470E,
ISL32472E)
FIGURE 24. RECEIVER PERFORMANCE WITH ±15V CMV
(ISL32478E)
R
= 54Ω, C = 50pF
D
R
= 54Ω, C = 50pF
D
D
D
5
0
5
0
DI
DI
5
0
5
0
RO
RO
3
2
3
2
1
1
0
0
A/Y - B/Z
-1
-2
-3
-1
-2
-3
A/Y - B/Z
TIME (400ns/DIV)
TIME (20ns/DIV)
FIGURE 27. DRIVER AND RECEIVER WAVEFORMS (ISL32478E)
FIGURE 26. DRIVER AND RECEIVER WAVEFORMS (ISL32475E)
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP):
GND
PROCESS:
Si Gate BiCMOS
FN7784.1
March 16, 2012
16
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you
have the latest Rev.
DATE
REVISION
FN7784.1
CHANGE
Page 5 - Thermal Information, Thermal Resistance:
March 9, 2012
8 Ld SOIC Package Theta JA changed from 116 to 108
Page 14 - Updated Figure 15 to show Pos breakdown between 60V and 70V.
Page 19 - Updated Package Outline Drawing M8.15 to newest revision.
January 21, 2011
FN7784.0
Initial Release
Products
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address
some of the industry's fastest growing markets, such as, flat panel displays, cell phones, handheld products, and notebooks. Intersil's product
families address power management and analog signal processing functions. Go to www.intersil.com/products for a complete list of Intersil
product families.
*For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device information page on
intersil.com: ISL32470E, ISL32472E, ISL32475E, ISL32478E.
To report errors or suggestions for this data sheet, please go to www.intersil.com/ask our staff
FITs are available from our web site at http://rel.intersil.com/reports/search.php
For additional products, see www.intersil.com/product_tree
Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted
in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time
without notice. Accordingly, the reader is cautioned to verify that data sheets 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
FN7784.1
March 16, 2012
17
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Package Outline Drawing
M14.15
14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
Rev 1, 10/09
4
0.10 C A-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
FN7784.1
March 16, 2012
18
ISL32470E, ISL32472E, ISL32475E, ISL32478E
Package Outline Drawing
M8.15
8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE
Rev 4, 1/12
DETAIL "A"
1.27 (0.050)
0.40 (0.016)
INDEX
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.
FN7784.1
March 16, 2012
19
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