MAX13431EEUB+T [MAXIM]
Line Driver/Receiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDSO10, 3 X 3 MM, ROHS COMPLIANT, USOP, UMAX-10;
| 型号： | MAX13431EEUB+T |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Line Driver/Receiver, 1 Func, 1 Driver, 1 Rcvr, BICMOS, PDSO10, 3 X 3 MM, ROHS COMPLIANT, USOP, UMAX-10 |
| 文件： | 总20页 (文件大小：220K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4322; Rev 1; 5/09
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
General Description
Features
The MAX13430E–MAX13433E are full- and half-duplex
RS-485 transceivers that feature an adjustable low-volt-
age logic interface for operation in multivoltage systems.
This allows direct interfacing to low-voltage ASIC/FPGAs
without extra components. The MAX13430E–MAX13433E
o Wide +3V to +5V Input Supply Range
o Low-Voltage Logic Interface +1.62V (min)
o Ultra-Low Supply Current in Shutdown Mode
10µA I
(max), 1µA I (max)
L
CC
RS-485 transceivers operate with a V
voltage supply
CC
from +3V to +5V. The low-voltage logic interface operates
with a voltage supply from +1.62V to V
o Thermal Shutdown Protection
.
CC
o Hot-Swap Input Structures on DE and RE
The MAX13430E/MAX13432E feature reduced slew-
rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing
error-free data transmission up to 500kbps. The
MAX13431E/MAX13433E driver slew rates are not limit-
ed, enabling data transmission up to 16Mbps. The
MAX13430E/MAX13431E are intended for half-duplex
communications, and the MAX13432E/MAX13433E are
intended for full-duplex communications.
o 1/8-Unit Load Allows Up to 256 Transceivers on
the Bus
o Enhanced Slew-Rate Limiting
(MAX13430E/MAX13432E)
o Extended ESD Protection for RS-485 I/O Pins
30ꢀV Human Body Model
15ꢀV Air-ꢁap Discharge per IEC 61000-4-2
10ꢀV Contact Discharge per IEC 61000-4-2
The MAX13430E/MAX13431E are available in 10-pin
®
µMAX and 10-pin TDFN packages. The MAX13432E/
MAX13433E are available in 14-pin TDFN and 14-pin
SO packages.
o Extended -40°C to +85°C Operating Temperature
Range
Applications
Motor Control
o Space-Saving TDFN and µMAX Pacꢀages
Industrial Control
Systems
HVAC
Pin Configurations and Functional Diagrams appear at end
of data sheet.
Portable Industrial
Equipment
Ordering Information/Selector Guide
FULL/HALF DATA RATE SLEW RATE TRANSCEIVERS
TOP
MARK
PACKAꢁE
CODE
PART
PIN-PACKAꢁE
DUPLEX
(Mbps)
LIMITED
ON BUS
10 TDFN-EP*
(3mm x 3mm)
MAX13430EETB+
MAX13430EEUB+
MAX13431EETB+
Half
0.5
Yes
256
AUS
—
T1033-1
U10-2
10 µMAX
(3mm x 3mm)
Half
Half
0.5
16
Yes
No
256
256
10 TDFN-EP*
(3mm x 3mm)
AUT
T1033-1
10 µMAX
(3mm x 3mm)
MAX13431EEUB+
MAX13432EESD+
MAX13432EETD+
MAX13433EESD+
MAX13433EETD+
Half
Full
Full
Full
Full
16
0.5
0.5
16
No
Yes
Yes
No
256
256
256
256
256
—
—
U10-2
S14-1
14 SO
14 TDFN-EP*
(3mm x 3mm)
AEG
—
T1433-2
S14-1
14 SO
14 TDFN-EP*
(3mm x 3mm)
16
No
AEH
T1433-2
Note: All devices are specified over the extended -40°C to +85°C operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
RS-485 Transceivers with Low-Voltage
Logic Interface
ABSOLUTE MAXIMUM RATINꢁS
(All voltages referenced to GND.)
14-Pin TDFN (derate 24.4mW/°C above +70°C) ......1951mW
14-Pin SO (derate 11.9mW/°C above +70°C) .............952mW
Supply Voltage (V ) ...............................................-0.3V to +6V
CC
Logic Supply Voltage (V ......................................-0.3V to +6V
Junction-to-Ambient Thermal Resistance (Θ ) (Note 1)
L )
JA
Control Input Voltage (RE) .............................-0.3V to (V +0.3V)
10-Pin µMAX ...........................................................113.1°C/W
10-Pin TDFN.................................................................41°C/W
14-Pin TDFN ................................................................41°C/W
14-Pin SO ....................................................................84°C/W
L
Control Input Voltage (DE) ......................................-0.3V to +6V
Driver Input Voltage (DI) ..........................................-0.3V to +6V
Driver Output Voltage (Y, Z, A, B) ............................-8V to +13V
Receiver Input Voltage (A, B)
(MAX13430E/MAX13431E)....................................-8V to +13V
Receiver Input Voltage (A, B)
Junction-to-Ambient Thermal Resistance (Θ ) (Note 1)
JC
10-Pin µMAX ................................................................42°C/W
10-Pin TDFN...................................................................9°C/W
14-Pin TDFN ..................................................................8°C/W
14-Pin SO ....................................................................34°C/W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature..................................................... +150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
(MAX13432E/MAX13433E)..................................-25V to +25V
Receiver Output Voltage (RO) .....................-0.3V to (V + 0.3V)
L
Driver Output Current .................................................... 250mA
Short-Circuit Duration (RO, A, B) to GND .................Continuous
Power Dissipation (T = +70°C)
A
10-Pin µMAX (derate 8.8mW/°C above +70°C) ..........707mW
10-Pin TDFN (derate 24.4mW/°C above +70°C) ......1951mW
Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to http://www.maxim-ic.com/thermal-tutorial.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
0–MAX143E
(V
= +3V to +5.5V, V = +1.8V to V , T = -40°C to +85°C, unless otherwise noted. Typical values are V
= +5V, V = +1.8V at
CC L
CC
L
CC
A
T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLY
Supply-Voltage Range
V
V
3
5.5
V
V
CC
CC
V Supply-Voltage Range
L
V
1.62
V
L
CC
DE = RE = high, no load
I
Supply Current
I
DE = RE = low, no load
2
mA
CC
CC
DE = high, RE = low, no load
I
Supply Current in Shutdown
CC
I
DE = low, RE = high, no load
10
1
µA
µA
SHDN
Mode
V Supply Current
L
I
RO = no load
L
DRIVER
R = 100Ω, V
= +3V
2
V
L
CC
CC
CC
CC
CC
R = 54Ω, V
= +3V
1.5
V
V
V
L
CC
Differential Driver Output
(Figure 1)
V
V
OD
R = 100Ω, V
L
= +4.5V
CC
2.25
2.25
R = 54Ω, V
= +4.5V
L
CC
Change in Magnitude of
Differential Output Voltage
∆V
R = 100Ω or 54Ω, Figure 1 (Note 4)
0.2
3
V
V
V
OD
L
Driver Common-Mode Output
Voltage
V
R = 100Ω or 54Ω, Figure 1
L
V
/2
CC
OC
Change in Magnitude of
Common-Mode Voltage
∆V
R = 100Ω or 54Ω, Figure 1 (Note 4)
L
0.2
OC
2
_______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
DC ELECTRICAL CHARACTERISTICS (continued)
(V
= +3V to +5.5V, V = +1.8V to V , T = -40°C to +85°C, unless otherwise noted. Typical values are V
= +5V, V = +1.8V at
CC L
CC
L
CC
A
T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
V
= +12V
= -7V
125
IN
IN
Output Leakage Current
(Y and Z)
DE = GND,
= V
I
µA
OLK
V
or +5.5V
CC
GND
-100
0 ≤ V
≤ +12V
+250
-15
OUT
Driver Short-Circuit Output
Current (Note 5)
I
mA
mA
OSD
-7V ≤ V
≤ V
-250
15
OUT
CC
(V
CC
- 1V) ≤ V
≤ +12V
OUT
Driver Short-Circuit Output
Foldback Current (Note 5)
I
OSDF
-7V ≤ V
≤ +1V
OUT
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
RECEIVER
T
+150
15
°C
°C
TS
T
TSH
V
V
= +12V
= -7V
125
-50
CM
CM
DE = GND,
= V
Input Current (A and B)
I
µA
A, B
V
or +5.5V
CC
GND
-100
-200
Receiver Differential Threshold
Voltage
V
-7V ≤ V
≤ +12V
mV
TH
CM
Receiver Input Hysteresis
Receiver Input Resistance
LOꢁIC INTERFACE
∆V
V
= 0
15
mV
TH
CM
R
V
-7V ≤ V
≤ +12V
96
kΩ
IN
CM
Input High Logic Level
(DI, DE, RE)
2/3 x
V
L
V
IH
Input Low Logic Level
(DI, DE, RE)
1/3 x
V
V
IL
V
L
Input Current (DI, DE, RE)
I
V
= V = V = V = +5.5V
1
µA
kΩ
IN
DI
DE
RE
L
Input Impedance on First
Transition
R
,
1
10
DE RE
Output High Logic Level (RO)
Output Low Logic Level (RO)
V
I
I
= -1mA, V - V = V
V - 0.4
L
V
V
OH
O
A
B
TH
TH
V
= 1mA, V - V = -V
0.4
+1
OL
O
A
B
Receiver Three-State Output
Current (RO)
I
0 ≤ V
0 ≤ V
≤ V
≤ V
-1
0.01
µA
OZR
OSR
RO
RO
L
Receiver Output Short-Circuit
Current (RO)
I
-110
+110
mA
L
ESD PROTECTION
IEC 61000-4-2 Air Gap Discharge
IEC 61000-4-2 Contact Discharge
Human Body Model
15
10
30
A, B, Y, Z to GND
kV
kV
All Other Pins
(Except A, B, Y, and Z)
Human Body Model
2
_______________________________________________________________________________________
3
RS-485 Transceivers with Low-Voltage
Logic Interface
SWITCHINꢁ CHARACTERISTICS (MAX13431E/MAX13433E (16 Mbps))
(V
= +3V to +5.5V, V = +1.8V to V , T = -40°C to +85°C, unless otherwise noted. Typical values are V
= +5V, V = +1.8V at
CC L
CC
L
CC
A
T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DRIVER
t
t
50
50
DPLH
Driver Propagation Delay
(Figures 2 and 3)
C = 50pF, R
= 54Ω
DIFF
ns
ns
ns
L
DPHL
Driver Differential Output Rise or
Fall Time
t , t
C = 50pF, R = 54Ω, Figures 2 and 3
L
15
8
R
F
L
Differential Driver Output Skew
t
C = 50pF, R = 54Ω, Figures 2 and 3
L L
DSKEW
|t
- t
|
DPLH DPHL
Maximum Data Rate
16
Mbps
ns
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
t
C = 50pF, R = 500Ω, Figure 4
150
150
100
120
DZH
L
L
t
C = 50pF, R = 500Ω, Figure 5
ns
DZL
DLZ
DHZ
L
L
t
C = 50pF, R = 500Ω, Figure 4
ns
L
L
t
C = 50pF, R = 500Ω, Figure 5
ns
L
L
Driver Enable from Shutdown
to Output High
t
C = 50pF, R = 500Ω, Figure 4
5
5
µs
µs
DZH(SHDN)
L
L
Driver Enable from Shutdown
to Output Low
t
C = 50pF, R = 500Ω, Figure 5
L L
DZL(SHDN)
0–MAX143E
RECEIVER
t
t
80
80
13
RPLH
Receiver Propagation Delay
(Figures 6 and 7)
C = 15pF
ns
L
RPHL
Receiver Output Skew
t
C = 15pF, Figures 6 and 7
L
ns
Mbps
ns
RSKEW
Maximum Data Rate
16
Receiver Enable to Output Low
Receiver Enable to Output High
Receiver Disable Time from Low
Receiver Disable Time from High
t
Figure 8
Figure 8
Figure 8
Figure 8
50
50
50
50
RZL
t
ns
RZH
t
ns
RLZ
t
ns
RHZ
Receiver Enable from
Shutdown to Output High
t
Figure 8
Figure 8
5
5
µs
µs
RZH(SHDN)
Receiver Enable from
Shutdown to Output Low
t
RZL(SHDN)
DRIVER/RECEIVER
Time to Shutdown
t
50
340
700
ns
SHDN
4
_______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
DRIVER SWITCHINꢁ CHARACTERISTICS (MAX13430E/MAX13432E (500 ꢀbps))
(V
= +3V to +5.5V, V = +1.8V to V , T = -40°C to +85°C, unless otherwise noted. Typical values are V
= +5V, V = +1.8V at
CC L
CC
L
CC
A
T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DRIVER
t
t
180
180
800
800
DPLH
Driver Propagation Delay
(Figures 2 and 3)
C = 50pF, R = 54Ω
ns
ns
ns
L
L
DPHL
Driver Differential Output Rise or
Fall Time
t , t
C = 50pF, R = 54Ω, Figures 2 and 3
200
800
100
R
F
L
L
Differential Driver Output Skew
t
C = 50pF, R = 54Ω, Figures 2 and 3
L L
DSKEW
|t
- t
|
DPLH DPHL
Maximum Data Rate
500
kbps
µs
Driver Enable to Output High
Driver Enable to Output Low
Driver Disable Time from Low
Driver Disable Time from High
t
t
C = 50pF, R = 500Ω, Figure 4
2.5
2.5
DZH
L
L
t
C = 50pF, R = 500Ω, Figure 5
µs
DZL
DLZ
DHZ
L
L
C = 50pF, R = 500Ω, Figure 4
100
120
ns
L
L
t
C = 50pF, R = 500Ω, Figure 5
ns
L
L
Driver Enable from Shutdown
to Output High
t
C = 50pF, R = 500Ω, Figure 4
5
5
µs
µs
DZH(SHDN)
L
L
Driver Enable from Shutdown
to Output Low
t
C = 50pF, R = 500Ω, Figure 5
L L
DZL(SHDN)
RECEIVER
t
t
200
200
30
RPLH
Receiver Propagation Delay
(Figures 6 and 7)
C = 15pF
ns
L
RPHL
Receiver Output Skew
Maximum Data Rate
t
C = 15pF, Figures 6 and 7
L
ns
RSKEW
500
kbps
Receiver Enable to
Output Low
t
Figure 8
Figure 8
Figure 8
Figure 8
Figure 8
Figure 8
50
50
50
50
5
ns
ns
ns
ns
µs
µs
RZL
Receiver Enable to
Output High
t
RZH
Receiver Disable Time
from Low
t
RLZ
Receiver Disable Time
from High
t
RHZ
Receiver Enable from
Shutdown to Output High
t
RZH(SHDN)
Receiver Enable from
Shutdown to Output Low
t
5
RZL(SHDN)
_______________________________________________________________________________________
5
RS-485 Transceivers with Low-Voltage
Logic Interface
DRIVER SWITCHINꢁ CHARACTERISTICS (MAX13430E/MAX13432E (500 ꢀbps)) (continued)
(V
= +3V to +5.5V, V = +1.8V to V , T = -40°C to +85°C, unless otherwise noted. Typical values are V
= +5V, V = +1.8V at
CC L
CC
L
CC
A
T
A
= +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DRIVER/RECEIVER
Time to Shutdown
t
50
340
700
ns
SHDN
Note 2: Parameters are 100% production tested at T = +25°C, unless otherwise noted. Limits over temperature are guaranteed by
A
design.
Note 3: All currents into the device are positive. All currents out of the device are negative. All voltages are referenced to device
ground, unless otherwise noted.
Note 4: ∆V
and ∆V
are the changes in V and V , respectively, when the DI input changes state.
OD OC
OD
OC
Note 5: The short-circuit output current is the peak current just prior to current limiting; the short-circuit foldback output current
applies during current limiting to allow a recovery from bus contention.
Typical Operating Characteriststics
(V = +5V, V = +5V, T = +25°C, unless otherwise noted.)
CC
L
A
OUTPUT CURRENT vs. RECEIVER
OUTPUT-HIGH VOLTAGE
OUTPUT CURRENT vs. RECEIVER
OUTPUT-LOW VOLTAGE
V
SUPPLY CURRENT vs. TEMPERATURE
CC
MAX13430E-3E toc02
MAX13430E-3E toc03
100
60
50
40
30
20
10
0
6
5
4
3
2
1
0
80
60
40
20
0
8
6
4
2
0
0–MAX143E
DE = HIGH, MAX13432E
DE = HIGH, MAX13433E
V = 1.8V
L
10
1
V = 5V
L
V = 5V
L
DE = LOW, MAX13433E
V = 1.8V
L
V = 5V
L
DE = LOW, MAX13432E
R
= 54Ω
DIFF
DI = RE =LOW
0
-40
-15
10
35
60
85
0
1
2
3
4
5
0
1
2
3
4
5
TEMPERATURE (°C)
OUTPUT-HIGH VOLTAGE, V (V)
OH
OUTPUT-LOW VOLTAGE, V (V)
OL
RECEIVER OUTPUT-HIGH
RECEIVER OUTPUT-LOW VOLTAGE
vs. TEMPERATURE
DIFFERENTIAL OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
VOLTAGE vs. TEMPERATURE
MAX13430E-3E toc04
6.0
5.5
5.0
4.5
4.0
2.0
1.9
1.8
1.7
1.6
0.5
0.4
0.3
0.2
0.1
0
140
120
100
80
V = 5V
L
I
O
= 1mA
I
O
= 1mA
V = 5V
L
60
V = 1.8V
L
40
V = 5V
L
V = 1.8V
L
20
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
0
1
2
3
4
5
TEMPERATURE (°C)
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
6
_______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
Typical Operating Characteristics (continued)
(V = +5V, V = +5V, T = +25°C, unless otherwise noted.)
CC
L
A
DRIVER DIFFERENTIAL OUTPUT
VOLTAGE vs. TEMPERATURE
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-HIGH VOLTAGE
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-LOW VOLTAGE
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
140
120
100
80
160
140
120
100
80
V = 5V
L
V = 5V
L
60
60
40
40
20
R
DIFF
= 54Ω
20
V = 5V
L
0
0
-40
-15
10
35
60
85
-7 -6 -5 -4 -3 -2 -1
0
1
2
3
4
5
0
2
4
6
8
10
12
TEMPERATURE (°C)
OUTPUT-HIGH VOLTAGE (V)
OUTPUT-LOW VOLTAGE (V)
DRIVER PROPAGATION vs. TEMPERATURE
(MAX13432E)
DRIVER PROPAGATION vs. TEMPERATURE
(MAX13433E)
SHUTDOWN CURRENT vs. TEMPERATURE
600
80
70
10
9
V = 5V
L
V = 5V
L
V = 5V
L
500
400
8
60
50
40
30
t
7
6
5
4
3
2
1
0
RLPH
t
RLPL
300
200
100
I
CC
t
RPHL
20
10
0
t
RPLH
I
L
0
-40
-15
10
35
60
85
-40
-15
10
35
60
85
-40
-15
10
35
60
85
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
MAX13432E DRIVER PROPAGATION
DELAY (500kbps)
MAX13433E DRIVER PROPAGATION
DELAY (20Mbps)
RECEIVER PROPAGATION vs. TEMPERATURE
MAX13430E-3E toc14
MAX13430E-3E toc15
60
V = 1.8V
L
V = 5V
L
R = 54Ω
L
V = 5V
L
R = 54Ω
L
t
RPHL
DI
2V/div
t
RPLH
45
30
15
0
V
Z
2V/div
V
Y
2V/div
-40
-15
10
35
60
85
10ns/div
10ns/div
TEMPERATURE (°C)
_______________________________________________________________________________________
7
RS-485 Transceivers with Low-Voltage
Logic Interface
Test Circuits and Waveforms
V
L
Y
DE
R /2
L
Y
Z
V
OD
DI
R
L
C
L
V
OD
D
V
OC
R /2
L
Z
Figure 1. Driver DC Test Load
Figure 2. Driver Timing Test Circuit
V
L
DI
V /2
L
0
t
t
DPHL
1/2 V
DPLH
O
Z
V
O
Y
1/2 V
O
0–MAX143E
V
DIFF
= V (Y) - V (Z)
V
0
O
90%
90%
V
DIFF
10%
10%
-V
O
t
t
F
R
t
= | t
- t
|
SKEW
DPLH DPHL
Figure 3. Driver Propagation Delays
8
_______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
Test Circuits and Waveforms (continued)
Y
S1
0 OR V
D
OUT
L
R = 500Ω
L
Z
C
L
50pF
DE
GENERATOR
50Ω
V
0
V
L
DE
V /2
L
t
, t
DZH DZH(SHDN)
0.25V
OH
OUT
V
= (0 + V )/2
OH
OM
0
t
DHZ
Figure 4. Driver Enable and Disable Times (t
, t
, and t
)
DHZ DZH
DZHZ(SHDN)
V
CC
R = 500Ω
L
Y
Z
S1
0 OR V
D
OUT
L
C
L
50pF
DE
GENERATOR
50Ω
V
L
DE
V /2
L
t
, t
DZL DZL(SHDN)
0
t
DLZ
V
CC
V
= (V + V )/2
OL CC
OM
OUT
0.25V
V
OL
Figure 5. Driver Enable and Disable Times (t
, t
, and t
)
DLZ(SHDN)
DZL DLZ
_______________________________________________________________________________________
9
RS-485 Transceivers with Low-Voltage
Logic Interface
Test Circuits and Waveforms (continued)
A
B
+1V
-1V
RECEIVER
OUTPUT
B
A
t
V
ID
R
RPLH
ATE
V
OH
t
RPHL
V
L/2
V
OL
RO
THE RISE TIME AND FALL TIME OF INPUTS A AND B < 4ns
Figure 6. Receiver Propagation Delay Test Circuit
Figure 7. Receiver Propagation Delays
S1
+1.5V
-1.5V
S3
V
L
1kΩ
RO
V
R
ID
C
L
15pF
S2
RE
GENERATOR
50Ω
0–MAX143E
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
V
V
L
L
V /2
L
RE
RE
0
0
t
, t
RZH RZH(SHDN)
t
, t
RZL RZL(SHDN)
V
V
L
OH
RO
V
OH
/2
(V + V )/2
OL
L
RO
V
OL
0
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
V
0
V
L
V
L
V /2
L
V /2
L
RE
RE
0
t
RHZ
t
RLZ
V
L
OH
0.25V
RO
RO
0.25V
V
0
OL
Figure 8. Receiver Enable and Disable Times
10 ______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
Pin Description
PIN
NAME
FUNCTION
MAX13430E/MAX13431E
µMAX
TDFN
V Input Logic-Supply Voltage. Bypass V with a 0.1µF ceramic capacitor located as
close as possible to the input.
L
L
1
1
V
L
Receiver Output. When RE is low and if (A - B) ≥ -50mV, RO is high; if (A - B) ≤ -200mV,
RO is low.
2
3
2
3
RO
DE
Driver Output Enable. Drive DE high to enable driver outputs. These outputs are high
impedance when DE is low. Drive RE high and DE low to enter low-power shutdown
mode. DE is a hot-swap input (see the Hot-Swap Capability section for details.)
Active-Low Receiver Output Enable. Drive RE low to enable RO; RO is high impedance
when RE is high. Drive RE high and DE low to enter low-power shutdown mode. RE is a
hot-swap input (see the Hot-Swap Capability section for details.)
4
5
4
5
RE
Driver Input. With DE high, a low on DI forces noninverting output low and inverting output
high. Similarly, a high on DI forces noninverting output high and inverting output low.
DI
6
7
8
9
6
7
8
9
GND
N.C.
A
Ground
No Connection. Not internally connected. N.C. can be connected to GND.
Noninverting Receiver Input and Noninverting Driver Output
Inverting Receiver Input and Inverting Driver Output
B
V
Input Supply Voltage. Bypass V
with a 1µF ceramic capacitor located as close
CC
CC
10
—
10
—
V
as possible to the input for full ESD protection. If full ESD protection is not required,
bypass V with a 0.1µF ceramic capacitor.
CC
CC
EP
Exposed Pad (TDFN Only). Connect EP to GND.
______________________________________________________________________________________ 11
RS-485 Transceivers with Low-Voltage
Logic Interface
Pin Description (continued)
PIN
NAME
FUNCTION
MAX13432E/MAX13433E
SO
TDFN
V Input Logic Supply Voltage. Bypass V with a 0.1µF ceramic capacitor located as
close as possible to the input.
L
L
1
1
V
L
Receiver Output. When RE is low and if (A - B) ≥ -50mV, RO is high; if (A - B) ≤ -200mV,
RO is low.
2
3
2
3
RO
DE
Driver Output Enable. Drive DE high to enable driver outputs. These outputs are high
impedance when DE is low. Drive RE high and DE low to enter low-power shutdown
mode. DE is a hot-swap input (see the Hot-Swap Capability section for details.)
Active-Low Receiver Output Enable. Drive RE low to enable RO; RO is high impedance
when RE is high. Drive RE high and DE low to enter low-power shutdown mode. RE is a
hot-swap input (see the Hot-Swap Capability section for details.)
4
5
4
5
RE
Driver Input. With DE high, a low on DI forces noninverting output low and inverting output
high. Similarly, a high on DI forces noninverting output high and inverting output low.
DI
6
7, 13
8
6
7, 13
8
GND
N.C.
GND
Y
Ground
No Connection. Not internally connected. N.C. can be connected to GND.
Ground
9
9
Noninverting Driver Output
Inverting Driver Output
Inverting Receiver Input
Noninverting Receiver Input
0–MAX143E
10
11
12
10
11
12
Z
B
A
V
Input Supply Voltage. Bypass V
with a 1µF ceramic capacitor located as close
CC
CC
as possible to the input for full ESD protection. If full ESD protection is not required,
bypass V with a 0.1µF ceramic capacitor.
14
—
14
—
V
CC
CC
EP
Exposed Pad (TDFN Only). Connect EP to GND.
12 ______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
Function Tables
MAX13430E/MAX13431E (Full Duplex)
MAX13432E/MAX13433E (Half Duplex)
TRANSMITTINꢁ
TRANSMITTINꢁ
INPUTS
OUTPUTS
INPUTS
OUTPUTS
RE
X
DE
1
DI
1
Z
Y
1
RE
X
DE
1
DI
1
B
0
A
1
0
0
1
X
1
0
0
X
1
0
1
High-
Impedance
High-
Impedance
High-
Impedance
High-
Impedance
0
1
0
0
X
X
1
0
0
0
X
X
Shutdown
Shutdown*
RECEIVINꢁ
RECEIVINꢁ
INPUTS
OUTPUT
INPUTS
OUTPUT
RE
0
DE
X
A-B
RO
1
RE
0
DE
X
A-B
RO
1
≥ -50mV
≥ -50mV
0
X
≤ -200mV
0
0
X
≤ -200mV
0
Open/
Shorted
Open/
Shorted
0
X
1
0
X
1
1
1
1
0
X
X
High-Impedance
Shutdown
1
1
1
0
X
X
High-Impedance
Shutdown*
X = Don’t care.
*Shutdown mode, driver and receiver outputs are in high impedance.
Functional Diagrams
V
V
CC
V
L
V
L
CC
MAX13430E
MAX13431E
MAX13432E
MAX13433E
Z
DI
DI
D
D
Y
DE
DE
B
A
RE
RE
B
RO
RO
R
R
A
GND
GND
______________________________________________________________________________________ 13
RS-485 Transceivers with Low-Voltage
Logic Interface
If (A - B) is less than or equal to -200mV, RO is logic-
Detailed Description
low. In the case of a terminated bus with all transmitters
disabled, the receiver’s differential input voltage is
pulled to 0V by the termination. With the receiver
thresholds of the MAX13430E family, this results in a
logic-high with a 50mV minimum noise margin. The
-50mV to -200mV threshold complies with the 200mV
EIA/TIA/RS-485 standard.
The MAX13430E–MAX13433E are full- and half-duplex
RS-485 transceivers that feature an adjustable low-
voltage logic interface for application in multivoltage
systems. This allows direct interfacing to low-
voltage ASIC/FPGAs without extra components. The
MAX13430E–MAX13433E RS-485 transceivers operate
with a V
voltage supply from +3V to +5V. The low-
CC
voltage logic interface operates with a voltage supply
from +1.62V to V
Hot-Swap Capability
When circuit boards are inserted into a hot or powered
backplane, differential disturbances to the data bus can
lead to data errors. Upon initial circuit-board insertion,
the data communication processor undergoes its own
power-up sequence. During this period, the processor’s
logic-output drivers are high impedance and are unable
to drive the DE and RE inputs of these devices to a
defined logic level. Leakage currents up to 10µA from
the high-impedance state of the processor’s logic drivers
could cause standard CMOS enable inputs of a trans-
ceiver to drift to an incorrect logic level. Additionally, par-
asitic circuit-board capacitance could cause coupling of
.
CC
The MAX13430E–MAX13433E are 30kV ESD-protect-
ed RS-485 transceivers with one driver and one receiv-
er. All devices have a 1/8-unit load receiver input
impedance, allowing up to 256 transceivers on the bus.
These devices include fail-safe circuitry, guaranteeing
a logic-high receiver output when receiver inputs are
open or shorted. The receivers output a logic-high if all
transmitters on a terminated bus are disabled (high
impedance). All devices feature hot-swap capability to
eliminate false transitions on the bus during power-up
or hot insertion.
V or GND to the enable inputs. Without the hot-swap
L
The MAX13430E/MAX13432E feature reduced slew-
rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing
error-free data transmission up to 500kbps. The
MAX13431E/MAX13433E driver slew rates are not limit-
ed, enabling data transmission up to 16Mbps.
capability, these factors could improperly enable the
transceiver’s driver or receiver. When V rises, an inter-
L
nal pulldown circuit holds DE low and RE high. After the
initial power-up sequence, the pulldown circuit becomes
transparent, resetting the hot-swap tolerable input.
0–MAX143E
30ꢀV ESD Protection
ESD-protection structures are incorporated on all pins
to protect against electrostatic discharges encoun-
tered during handling and assembly. The driver out-
puts and receiver inputs of the MAX13430E family of
devices have extra protection against static electricity.
Maxim’s engineers have developed state-of-the-
art structures to protect these pins against ESD of
30kV without damage. The ESD structures withstand
high ESD in all states: normal operation, shutdown,
and powered down. After an ESD event, the
MAX13430E–MAX13433E keep working without latchup
or damage. ESD protection can be tested in various
ways. The transmitter outputs and receiver inputs of the
MAX13430E–MAX13433E are characterized for protec-
tion to the following limits:
The MAX13430E–MAX13433E transceivers draw 2mA
of supply current when unloaded or when fully loaded
with the drivers disabled. The MAX13430E/
MAX13431E are intended for half-duplex communica-
tions, and the MAX13432E/MAX13433E are intended
for full-duplex communications.
Low-Voltage Logic Interface
V is the voltage supply for the low-voltage logic inter-
L
face and receiver output. V operates with voltage sup-
L
ply from +1.62V to V
.
CC
Fail Safe
The MAX13430E family guarantees a logic-high receiv-
er output when the receiver inputs are shorted or open,
or when they are connected to a terminated transmis-
sion line with all drivers disabled. This is done by set-
ting the receiver input threshold between -50mV and
-200mV. If the differential receiver input voltage (A - B)
is greater than or equal to -50mV, RO is logic-high.
•
•
30kV using the Human Body Model
10kV using the Contact Discharge method specified
in IEC 61000-4-2
•
15kV using the Air Gap Discharge method specified
in IEC 61000-4-2
14 ______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
not specifically refer to integrated circuits. The
MAX13430E family of devices helps you design equip-
ment to meet IEC 61000-4-2, without the need for addi-
tional ESD-protection components.
The major difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2 because series resistance is
lower in the IEC 61000-4-2 model. Hence, the ESD with-
stand voltage measured to IEC 61000-4-2 is generally
lower than that measured using the Human Body
Model. Figure 10c shows the IEC 61000-4-2 model, and
Figure 10d shows the current waveform for IEC 61000-
4-2 ESD Contact Discharge test.
Human Body Model
Figure 10a shows the Human Body Model, and Figure
10b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩ resistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. However, it does
R
R
C
D
1MΩ
1500Ω
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I 100%
P
90%
I
r
DISCHARGE
RESISTANCE
CHARGE-CURRENT-
LIMIT RESISTOR
AMPS
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
36.8%
C
100pF
STORAGE
CAPACITOR
s
10%
0
SOURCE
TIME
0
t
RL
t
DL
CURRENT WAVEFORM
Figure 10a. Human Body ESD Test Model
Figure 10b. Human Body Current Waveform
R
C
R
D
I
50MΩ TO 100MΩ
330Ω
100%
90%
DISCHARGE
RESISTANCE
CHARGE-CURRENT-
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
s
150pF
STORAGE
CAPACITOR
SOURCE
10%
t = 0.7ns TO 1ns
r
t
30ns
60ns
Figure 10c. IEC 61000-4-2 ESD Test Model
Figure 10d. IEC 61000-4-2 ESD Generator Current Waveform
______________________________________________________________________________________ 15
RS-485 Transceivers with Low-Voltage
Logic Interface
Driver Output Protection
Applications Information
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus con-
tention. The first, a foldback current limit on the output
stage, provides immediate protection against short cir-
cuits over the whole common-mode voltage range (see
the Typical Operating Characteristics.) The second, a
thermal-shutdown circuit, forces the driver outputs into
a high-impedance state if the die temperature exceeds
+150°C (typ).
256 Transceivers on the Bus
The standard RS-485 receiver input impedance is a
one-unit load (12kΩ), and the standard driver can drive
up to 32 unit loads. The MAX13430E family of trans-
ceivers has a 1/8-unit load receiver input impedance
(96kΩ), allowing up to 256 transceivers to be connect-
ed in parallel on one communication line. Any combina-
tion of these devices, as well as other RS-485
transceivers with a total of 32-unit loads or less, can be
connected to the line.
Typical Applications
The MAX13430E/MAX13433E transceivers are
designed for bidirectional data communications on mul-
tipoint bus transmission lines. Figures 12 and 13 show
typical network applications circuits. To minimize reflec-
tions, terminate the line at both ends with its character-
istic impedance, and keep stub lengths off the main
line as short as possible. The slew-rate-limited
MAX13430E/MAX13432E allow the RS-485 network to
be more tolerant of imperfect termination.
Reduced EMI and Reflections
The MAX13430E/MAX13432E feature reduced slew-
rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing
error-free data transmission up to 500kbps.
0–MAX143E
16 ______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
Typical Application Circuits
120Ω
120Ω
DE
DI
B
A
B
A
DI
D
D
DE
B
A
B
A
RO
RE
RO
RE
R
R
R
R
D
D
MAX13430E
MAX13431E
DE
DI
DI
RO
DE RO
RE
RE
Figure 11. Typical Half-Duplex RS-485 Network
A
Y
120Ω
120Ω
120Ω
R
RO
RE
DE
D
DI
B
Z
DE
RE
Z
B
D
DI
R
RO
Y
A
Y
Z
B
A
Y
Z
B
A
MAX13432E
MAX13433E
R
R
D
D
DI
DI
DE
DE
RE RO
RE RO
Figure 12. Typical Full-Duplex RS-485 Network
______________________________________________________________________________________ 17
RS-485 Transceivers with Low-Voltage
Logic Interface
Pin Configurations
TOP VIEW
V
B
9
A
8
N.C. GND
V
N.C.
13
A
B
Z
Y
9
GND
8
CC
CC
10
7
6
14
12
11
10
MAX13430E
MAX13431E
MAX13432E
MAX13434E
*EP
*EP
+
+
1
2
3
4
5
1
2
3
4
RE
5
6
7
V
L
RO
DE
RE
DI
V
RO
DE
DI
GND N.C.
L
TDFN
TDFN
* EXPOSED PAD CONNECT TO GND.
* EXPOSED PAD CONNECT TO GND.
+
V
1
2
3
4
5
6
7
14
V
L
CC
+
V
1
2
3
4
5
10
9
V
B
A
L
CC
0–MAX143E
RO
DE
13 N.C.
RO
DE
RE
DI
12
11
10
9
A
MAX13432E
MAX13433E
MAX13430E
MAX13431E
8
RE
B
7
N.C.
GND
DI
Z
6
GND
N.C.
Y
8
GND
µMAX
SO
Chip Information
PROCESS: BiCMOS
18 ______________________________________________________________________________________
RS-485 Transceivers with Low-Voltage
Logic Interface
0–MAX143E
Pacꢀage Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/pacꢀages.
PACKAꢁE TYPE
10 µMAX
PACKAꢁE CODE
U10-2
DOCUMENT NO.
21-0061
14 TDFN-EP
10 TDFN-EP
14 SO
T1433-2
21-0137
T1033-1
21-0137
S14-1
21-0041
______________________________________________________________________________________ 19
RS-485 Transceivers with Low-Voltage
Logic Interface
Revision History
REVISION
NUMBER
REVISION
DATE
PAꢁES
CHANꢁED
DESCRIPTION
0
1
10/08
5/09
Initial release
—
1
Updated Ordering Information.
0–MAX143E
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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