®
ISL3170E, ISL3171E, ISL3172E, ISL3173E, ISL3174E,
ISL3175E, ISL3176E, ISL3177E, ISL3178E
Data Sheet
July 11, 2007
FN6307.3
±15kV
ESD Protected, 3.3V, Full Fail-Safe,
Low Power, High Speed or Slew Rate
Limited, RS-485/RS-422 Transceivers
The Intersil ISL317XE are
±
15kV IEC61000 ESD Protected,
3.3V-powered, single transceivers that meet both the
RS-485 and RS-422 standards for balanced communication.
These devices have very low bus currents (+125mA/-100mA),
so they present a true “1/8 unit load” to the RS-485 bus. This
allows up to 256 transceivers on the network without violating
the RS-485 specification’s 32 unit load maximum, and without
using repeaters. For example, in a remote utility meter reading
system, individual meter readings are routed to a concentrator
via an RS-485 network, so the high allowed node count
minimizes the number of repeaters required.
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic high Rx output if Rx inputs are floating,
shorted, or terminated but undriven.
Hot Plug circuitry ensures that the Tx and Rx outputs remain
in a high impedance state while the power supply stabilizes.
The ISL3170E through ISL3175E utilize slew rate limited
drivers which reduce EMI, and minimize reflections from
improperly terminated transmission lines, or unterminated
stubs in multidrop and multipoint applications. Slew rate limited
versions also include receiver input filtering to enhance noise
immunity in the presence of slow input signals.
The ISL3170E, ISL3171E, ISL3173E, ISL3174E, ISL3176E,
ISL3177E are configured for full duplex (separate Rx input
and Tx output pins) applications. The half duplex versions
multiplex the Rx inputs and Tx outputs to allow transceivers
with output disable functions in 8 Ld packages.
Features
• IEC61000 ESD Protection on RS-485 I/O Pins
. . . . . ±
15kV
- Class 3 ESD Level on all Other Pins . . . . . . >7kV HBM
• Full Fail-safe (Open, Short, Terminated/Floating)
Receivers
• Hot Plug - Tx and Rx Outputs Remain Three-state During
Power-up (Only Versions with Output Enable Pins)
• True 1/8 Unit Load Allows up to 256 Devices on the Bus
• Single 3.3V Supply
• High Data Rates . . . . . . . . . . . . . . . . . . . . . . up to 20Mbps
• Low Quiescent Supply Current . . . . . . . . . . .800
μ
A (Max)
- Ultra Low Shutdown Supply Current . . . . . . . . . . .10nA
• -7V to +12V Common Mode Input/Output Voltage Range
• Half and Full Duplex Pinouts
• Three State Rx and Tx Outputs Available
• Current Limiting and Thermal Shutdown for driver
Overload Protection
• Tiny MSOP Packages Consume 50% Less Board Space
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Automated Utility Meter Reading Systems
• High Node Count Systems
• Field Bus Networks
• Security Camera Networks
• Building Environmental Control/ Lighting Systems
• Industrial/Process Control Networks
TABLE 1. SUMMARY OF FEATURES
PART
NUMBER
ISL3170E
ISL3171E
ISL3172E
ISL3173E
ISL3174E
ISL3175E
ISL3176E
ISL3177E
ISL3178E
HALF/FULL DATA RATE
DUPLEX
(Mbps)
FULL
FULL
HALF
FULL
FULL
HALF
FULL
FULL
HALF
0.25
0.25
0.25
0.5
0.5
0.5
20
20
20
SLEW-RATE
LIMITED?
YES
YES
YES
YES
YES
YES
NO
NO
NO
HOT
PLUG?
YES
NO
YES
YES
NO
YES
YES
NO
YES
# DEVICES
ON BUS
256
256
256
256
256
256
256
256
256
RX/TX
ENABLE?
YES
NO
YES
YES
NO
YES
YES
NO
YES
QUIESCENT
I
CC
(mA)
510
510
510
510
510
510
510
510
510
LOW POWER
SHUTDOWN?
YES
NO
YES
YES
NO
YES
YES
NO
YES
PIN
COUNT
10, 14
8
8
10, 14
8
8
10, 14
8
8
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
ISL3170E, ISL3171E, ISL3172E, ISL3173E, ISL3174E, ISL3175E, ISL3176E, ISL3177E, ISL3178E
Pinouts
ISL3172E, ISL3175E, ISL3178E
(8 LD MSOP, SOIC)
TOP VIEW
RO 1
RE 2
DE 3
DI 4
D
8
7
6
5
VCC
B/Z
A/Y
GND
ISL3171E, ISL3174E, ISL3177E
(8 LD MSOP, SOIC)
TOP VIEW
VCC 1
RO 2
DI 3
GND 4
D
8
7
6
5
A
B
Z
Y
R
R
ISL3170E, ISL3173E, ISL3176E
(10 LD MSOP)
TOP VIEW
RO 1
R
RE 2
DE 3
DI 4
GND 5
D
9 A
8 B
7 Z
6 Y
10 VCC
ISL3170E, ISL3173E, ISL3176E
(14 LD SOIC)
TOP VIEW
NC 1
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
D
R
14 VCC
13 NC
12 A
11 B
10 Z
9 Y
8 NC
Ordering Information
PART NUMBER (Notes 1, 2)
ISL3170EIBZ
ISL3170EIUZ
ISL3171EIBZ
ISL3171EIUZ
ISL3172EIBZ
ISL3172EIUZ
ISL3173EIBZ
ISL3173EIUZ
ISL3174EIBZ
ISL3174EIUZ
ISL3175EIBZ
ISL3175EIUZ
ISL3176EIBZ
ISL3176EIUZ
ISL3177EIBZ
ISL3177EIUZ
ISL3178EIBZ
ISL3178EIUZ
NOTES:
1. Add “-T” suffix for tape and reel.
2. Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. 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.
PART MARKING
3170EIBZ
3170Z
3171 EIBZ
3171Z
3172 EIBZ
3172Z
3173EIBZ
3173Z
3174 EIBZ
3174Z
3175 EIBZ
3175Z
3176EIBZ
3176Z
3177 EIBZ
3177Z
3178 EIBZ
3178Z
TEMP. RANGE (°C)
-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
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
PACKAGE (Pb-Free)
14 Ld SOIC
10 Ld MSOP
8 Ld SOIC
8 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
14 Ld SOIC
10 Ld MSOP
8 Ld SOIC
8 Ld MSOP
8 Ld SOIC
8 Ld MSOP
PKG. DWG. #
M14.15
M10.118
M8.15
M8.118
M8.15
M8.118
M14.15
M10.118
M8.15
M8.118
M8.15
M8.118
M14.15
M10.118
M8.15
M8.118
M8.15
M8.118
2
FN6307.3
July 11, 2007
ISL3170E, ISL3171E, ISL3172E, ISL3173E, ISL3174E, ISL3175E, ISL3176E, ISL3177E, ISL3178E
Truth Tables
TRANSMITTING
INPUTS
RE
X
X
0
1
DE
1
1
0
0
DI
1
0
X
X
Z
0
1
High-Z
High-Z *
OUTPUTS
Y
1
0
High-Z
High-Z *
0
0
0
1
1
RE
Truth Tables
(continued)
RECEIVING
INPUTS
DE
DE
Half Duplex Full Duplex
0
0
0
0
1
X
X
X
0
1
A-B
≥
-0.05V
≤
-0.2V
Inputs
Open/Shorted
X
X
OUTPUT
RO
1
0
1
High-Z *
High-Z
NOTE: *Shutdown Mode (See Note 9), except for ISL3171E,
ISL3174E, ISL3177E
NOTE: *Shutdown Mode (See Note 9), except for ISL3171E,
ISL3174E, ISL3177E
Pin Descriptions
PIN
RO
RE
FUNCTION
Receiver output: If A-B
≥
-50mV, RO is high; If A-B
≤
-200mV, RO is low; RO = High if A and B are unconnected (floating) or shorted.
Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. If the Rx enable function isn’t
required, connect RE directly to GND or through a 1kΩ to 3kΩ resistor to GND.
Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high, and are high impedance when DE is low. If the
Tx enable function isn’t required, connect DE to V
CC
through a 1kΩ to 3kΩ resistor.
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.
Ground connection.
±15kV
IEC61000 ESD Protected RS-485/422 level, noninverting receiver input and noninverting driver output. Pin is an input if
DE = 0; pin is an output if DE = 1.
±15kV
IEC61000 ESD Protected RS-485/422 level, Inverting receiver input and inverting driver output. Pin is an input if DE = 0;
pin is an output if DE = 1.
±15kV
IEC61000
ESD Protected RS-485/422 level, noninverting receiver input.
±15kV
IEC61000
ESD Protected RS-485/422 level, inverting receiver input.
±15kV
IEC61000
ESD Protected RS-485/422 level, noninverting driver output.
±15kV
IEC61000
ESD Protected RS-485/422 level, inverting driver output.
System power supply input (3.0V to 3.6V).
No Connection.
DE
DI
GND
A/Y
B/Z
A
B
Y
Z
V
CC
NC
3
FN6307.3
July 11, 2007
ISL3170E, ISL3171E, ISL3172E, ISL3173E, ISL3174E, ISL3175E, ISL3176E, ISL3177E, ISL3178E
Typical Operating Circuits
ISL3172E, ISL3175E, ISL3178E
+3.3V
+
8
V
CC
1 RO
2 RE
3 DE
4 DI
R
B/Z
A/Y
7
6
R
T
R
T
7
6
B/Z
A/Y
0.1µF
0.1µF
+
8
V
CC
D
DI 4
DE 3
RE 2
R
GND
5
GND
5
RO 1
+3.3V
D
ISL3171E, ISL3174E, ISL3177E
+3.3V
+
1
V
CC
A 8
2 RO
R
B 7
R
T
5
6
Y
Z
D
DI 3
0.1µF
0.1µF
+
1
V
CC
+3.3V
Z 6
3 DI
D
GND
4
Y 5
R
T
7 B
8 A
GND
4
R
RO 2
ISL3170E, ISL3173E, ISL3176E
+3.3V
+
14
V
CC
2 RO
3 RE
4 DE
Z 10
5 DI
D
GND
6, 7
Y 9
R
T
11 B
12 A
GND
6, 7
R
R
A 12
B 11
0.1µF
R
T
(PIN NUMBERS FOR SOIC)
0.1µF
+
14
9 Y
10 Z
V
CC
D
DI 5
DE 4
RE 3
RO 2
+3.3V
4
FN6307.3
July 11, 2007
ISL3170E, ISL3171E, ISL3172E, ISL3173E, ISL3174E, ISL3175E, ISL3176E, ISL3177E, ISL3178E
Absolute Maximum Ratings
V
CC
to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Input Voltages
DI, DE, RE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 7V
Input/Output Voltages
A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8V to +13V
RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V
CC
+0.3V)
Short Circuit Duration
Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table
Thermal Information
Thermal Resistance (Typical, Note 3)
θ
JA
(°C/W)
8 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . . .
105
8 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . . .
140
10 Ld MSOP Package . . . . . . . . . . . . . . . . . . . . . . .
190
14 Ld SOIC Package . . . . . . . . . . . . . . . . . . . . . . . .
128
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
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTE:
3.
θ
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
Electrical Specifications
Test Conditions: V
CC
= 3.0V to 3.6V; Unless Otherwise Specified. Typicals are at V
CC
= 3.3V, T
A
= +25°C,
(Note 4)
SYMBOL
TEST CONDITIONS
TEMP
(°C)
MIN
(Note 18)
TYP
MAX
(Note 18) UNITS
PARAMETER
DC CHARACTERISTICS
Driver Differential V
OUT
V
OD
R
L
= 100Ω (RS-422) (Figure 1A, Note 15)
R
L
= 54Ω (RS-485) (Figure 1A)
No Load
R
L
= 60Ω, -7V
≤
V
CM
≤
12V (Figure 1B)
Full
Full
2
1.5
-
2.3
2
-
2.2
0.01
-
V
CC
V
CC
-
0.2
V
V
Full
Full
1.5
-
V
V
Change in Magnitude of Driver
Differential V
OUT
for
Complementary Output States
Driver Common-Mode V
OUT
Change in Magnitude of Driver
Common-Mode V
OUT
for
Complementary Output States
Logic Input High Voltage
Logic Input Low Voltage
Logic Input Hysteresis
Logic Input Current
Input Current (A, B, A/Y, B/Z)
ΔV
OD
R
L
= 54Ω or 100Ω (Figure 1A)
V
OC
ΔV
OC
R
L
= 54Ω or 100Ω (Figure 1A)
R
L
= 54Ω or 100Ω (Figure 1A)
Full
Full
-
-
2
0.01
3
0.2
V
V
V
IH
V
IL
V
HYS
I
IN1
I
IN2
DI, DE, RE
DI, DE, RE
DE, RE (Note 14)
DI = DE = RE = 0V or V
CC
(Note 17)
DE = 0V, V
CC
= 0V or V
IN
= 12V
3.6V
V
IN
= -7V
RE = 0V, DE = 0V,
V
CC
= 0V or 3.6V
RE = V
CC
, DE = 0V,
V
CC
= 0V or 3.6V
V
IN
= 12V
V
IN
= -7V
V
IN
= 12V
V
IN
= -7V
Full
Full
25
Full
Full
Full
Full
Full
Full
Full
Full
Full
25
Full
2
-
-
-2
-
-100
-
-40
-
-40
-
-200
-
V
CC
- 0.6
-
-
100
-
80
-50
10
-10
10
-10
-
-125
15
-
-
0.8
-
2
125
-
40
-
40
-
±250
-50
-
-
V
V
mV
μA
μA
μA
μA
μA
μA
μA
mA
mV
mV
V
Output Leakage Current (Y, Z) (Full
Duplex Versions Only, Note 12)
Output Leakage Current (Y, Z)
in Shutdown Mode (Full Duplex,
Note 12)
Driver Short-Circuit Current,
V
O
= High or Low
Receiver Differential Threshold
Voltage
Receiver Input Hysteresis
Receiver Output High Voltage
I
IN3
I
IN4
I
OSD1
V
TH
ΔV
TH
V
OH
DE = V
CC
, -7V
≤
V
Y
or V
Z
≤
12V (Note 6)
-7V
≤
V
CM
≤
12V
V
CM
= 0V
I
O
= -4mA, V
ID
= -50mV
5
FN6307.3
July 11, 2007
模拟电子
