AVAILABLE
Functional Diagrams
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
General Description
The MAX13080E–MAX13089E +5.0V, ±15kV ESD-protect-
ed, RS-485/RS-422 transceivers feature one driver and
one receiver. These devices include fail-safe circuitry,
guaranteeing a logic-high receiver output when receiver
inputs are open or shorted. The receiver outputs a logic-
high if all transmitters on a terminated bus are disabled
(high impedance). The MAX13080E family include a hot-
swap capability to eliminate false transitions on the bus
during power-up or hot insertion.
The MAX13080E/MAX13081E/MAX13082E feature
reduced slew-rate drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables, allowing error-free data transmission up to
250kbps. The MAX13083E/MAX13084E also feature
slew-rate-limited drivers but allow transmit speeds up to
500kbps. The MAX13086E/MAX13087E/ MAX13088E
driver slew rates are not limited, making transmit
speeds up to 16Mbps possible. The MAX13089E slew
rate is pin selectable for 250kbps, 500kbps, and
16Mbps.
The MAX13082E/MAX13088E are intended for half-
duplex communications, and the MAX13080E/
MAX13081E/MAX13083E/MAX13084E/MAX13086E/
MAX13087E are intended for full-duplex communica-
tions. The MAX13089E is selectable for half-duplex or
full-duplex operation. It also features independently
programmable receiver and transmitter output phase
through separate pins.
The MAX13080E family transceivers draw 1.2mA of
supply current when unloaded or when fully loaded with
the drivers disabled. All devices have a 1/8-unit load
receiver input impedance, allowing up to 256 trans-
ceivers on the bus.
The MAX13080E/MAX13083E/MAX13086E/MAX13089E
are available in 14-pin PDIP and 14-pin SO packages. The
MAX13081E/MAX13082E/MAX13084E/MAX13087E/
MAX13088E are available in 8-pin PDIP and 8-pin SO
packages. The devices operate over the commercial,
extended, and automotive temperature ranges.
Applications
Utility Meters
Lighting Systems
Industrial Control
Telecom
Security Systems
Instrumentation
Profibus
Features
o+5.0V Operation
oExtended ESD Protection for RS-485/RS-422 I/O Pins
±15kV Human Body Model
oTrue Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compatibility
oHot-Swap Input Structures on DE and RE
oEnhanced Slew-Rate Limiting Facilitates Error-
Free Data Transmission
(MAX13080E–MAX13084E/MAX13089E)
oLow-Current Shutdown Mode (Except
MAX13081E/MAX13084E/MAX13087E)
oPin-Selectable Full-/Half-Duplex Operation
(MAX13089E)
oPhase Controls to Correct for Twisted-Pair
Reversal (MAX13089E)
oAllow Up to 256 Transceivers on the Bus
oAvailable in Industry-Standard 8-Pin SO Package
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Ordering Information
19-3590; Rev 2; 11/11
PART TEMP RANGE PIN-PACKAGE
MAX13080ECPD+ 0°C to +70°C 14 PDIP
MAX13080ECSD+ 0°C to +70°C14 SO
MAX13080EEPD+ -40°C to +85°C14 PDIP
MAX13080EESD+ -40°C to +85°C14 SO
MAX13080EAPD+ -40°C to +125°C14 PDIP
MAX13080EASD+ -40°C to +125°C14 SO
Selector Guide, Pin Configurations, and Typical Operating
Circuits appear at end of data sheet.
Ordering Information continued at end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Ordering Information
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC = +5.0V ±10%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.) (Note 1)
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.
(All Voltages Referenced to GND)
Supply Voltage (VCC).............................................................+6V
Control Input Voltage (RE, DE, SLR,
H/F, TXP, RXP)......................................................-0.3V to +6V
Driver Input Voltage (DI)...........................................-0.3V to +6V
Driver Output Voltage (Z, Y, A, B) .............................-8V to +13V
Receiver Input Voltage (A, B)....................................-8V to +13V
Receiver Input Voltage
Full Duplex (A, B) ..................................................-8V to +13V
Receiver Output Voltage (RO)....................-0.3V to (VCC + 0.3V)
Driver Output Current .....................................................±250mA
Continuous Power Dissipation (TA= +70°C)
8-Pin SO (derate 5.88mW/°C above +70°C) .................471mW
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) .....727mW
14-Pin SO (derate 8.33mW/°C above +70°C) ...............667mW
14-Pin Plastic DIP (derate 10.0mW/°C above +70°C) ...800mW
Operating Temperature Ranges
MAX1308_EC_ _ .................................................0°C to +75°C
MAX1308_EE_ _ ..............................................-40°C to +85°C
MAX1308_EA_ _ ............................................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DRIVER
VCC Supply-Voltage Range VCC 4.5 5.5 V
RL = 100Ω (RS-422), Figure 1 3 VCC
RL = 54Ω (RS-485), Figure 1 2 VCC
Differential Driver Output VOD
No load VCC
V
Change in Magnitude of
Differential Output Voltage ΔVOD RL = 100Ω or 54Ω, Figure 1 (Note 2) 0.2 V
Driver Common-Mode Output
Voltage VOC RL = 100Ω or 54Ω, Figure 1 VCC / 2 3 V
Change in Magnitude of
Common-Mode Voltage ΔVOC RL = 100Ω or 54Ω, Figure 1 (Note 2) 0.2 V
Input-High Voltage VIH DE, DI, RE, TXP, RXP, H/F3V
Input-Low Voltage VIL DE, DI, RE, TXP, RXP, H/F0.8 V
Input Hysteresis VHYS DE, DI, RE, TXP, RXP, H/F100 mV
Input Current IIN1 DE, DI, RE ±1µA
Input Impedance First Transition DE 1 10 kΩ
Input Current IIN2 TXP, RXP, H/F internal pulldown 10 40 µA
SRL Input-High Voltage VCC - 0.4 V
SRL Input-Middle Voltage VCC x 0.3 VCC x 0.7 V
SRL Input-Low Voltage 0.4 V
SRL = VCC 75
SRL Input Current SRL = GND -75 µA
VIN = +12V 125
Output Leakage (Y and Z)
Full Duplex IODE = GND,
VCC = GND or VCC VIN = -7V -100 µA
2
Maxim Integrated
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5.0V ±10%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
0 ≤ VOUT ≤ +12V (Note 3) 40 250
-7V ≤ VOUT ≤ VCC (Note 3) -250 -40
0 ≤ VOUT ≤ +12V, +85°C ≤ TA ≤ +125°C
(Note 3) 40 270
Driver Short-Circuit Output
Current IOSD
-7V ≤ VOUT ≤ VCC, +85°C ≤ TA ≤ +125°C
(Note 3) -270 -40
mA
(VCC - 1V) ≤ VOUT ≤ +12V (Note 3) 20
Driver Short-Circuit Foldback
Output Current IOSDF -7V ≤ VOUT ≤ +1V (Note 3) -20 mA
Thermal-Shutdown Threshold TTS 175 °C
Thermal-Shutdown Hysteresis TTSH 15 °C
VIN = +12V 125
Input Current (A and B) IA, B DE = GND,
VCC = GND or VCC VIN = -7V -100 µA
RECEIVER
Receiver Differential Threshold
Voltage VTH -7V ≤ VCM ≤ +12V -200 -125 -50 mV
Receiver Input Hysteresis ΔVTH VA + VB = 0V 15 mV
RO Output-High Voltage VOH IO = -1mA VCC - 0.6 V
RO Output-Low Voltage VOL IO = 1mA 0.4 V
Three-State Output Current at
Receiver IOZR 0 ≤ VO ≤ VCC ± 1µA
Receiver Input Resistance RIN -7V ≤ VCM ≤ +12V 96 kΩ
Receiver Output Short-Circuit
Current IOSR 0V ≤ VRO ≤ VCC ±110 mA
SUPPLY CURRENT
No load, RE = 0, DE = VCC 1.2 1.8
No load, RE = VCC, DE = VCC 1.2 1.8
Supply Current ICC
No load, RE = 0, DE = 0 1.2 1.8
mA
Supply Current in Shutdown
Mode ISHDN RE = VCC, DE = GND 2.8 10 µA
ESD PROTECTION
Human Body Model ±15 kV
ESD Protection for Y, Z, A, and B Contact Discharge
IEC 61000-4-2 ±6 kV
Maxim Integrated
3
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
DRIVER SWITCHING CHARACTERISTICS
MAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)
(VCC = +5.0V ±10%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
tDPLH 350 1800
Driver Propagation Delay tDPHL
CL= 50pF, RL= 54Ω, Figures 2 and 3 350 1800 ns
Driver Differential Output Rise or
Fall Time tR , tFCL= 50pF, RL= 54Ω, Figures 2 and 3 400 1900 ns
Differential Driver Output Skew
|tDPLH - tDPHL|tDSKEW CL= 50pF, RL= 54Ω, Figures 2 and 3 250 ns
Maximum Data Rate 250 kbps
Driver Enable to Output High tDZH Figure 4 2500 ns
Driver Enable to Output Low tDZL Figure 5 2500 ns
Driver Disable Time from Low tDLZ Figure 5 100 ns
Driver Disable Time from High tDHZ Figure 4 100 ns
Driver Enable from Shutdown to
Output High tDZH
(
SHDN
)
Figure 4 5500 ns
Driver Enable from Shutdown to
Output Low tDZL
(
SHDN
)
Figure 5 5500 ns
Time to Shutdown tSHDN 50 340 700 ns
RECEIVER SWITCHING CHARACTERISTICS
MAX13080E/MAX13081E/MAX13082E/MAX13089E WITH SRL = UNCONNECTED (250kbps)
(VCC = +5.0V ±10%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
tRPLH 200
Receiver Propagation Delay tRPHL
CL = 15pF, Figures 6 and 7 200 ns
Receiver Output Skew
|tRPLH - tRPHL|tRSKEW CL = 15pF, Figures 6 and 7 30 ns
Maximum Data Rate 250 kbps
Receiver Enable to Output Low tRZL Figure 8 50 ns
Receiver Enable to Output High tRZH Figure 8 50 ns
Receiver Disable Time from Low tRLZ Figure 8 50 ns
Receiver Disable Time from High tRHZ Figure 8 50 ns
Receiver Enable from Shutdown
to Output High tRZH
(
SHDN
)
Figure 8 5500 ns
Receiver Enable from Shutdown
to Output Low tRZL
(
SHDN
)
Figure 8 5500 ns
Time to Shutdown tSHDN 50 340 700 ns
4
Maxim Integrated
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
DRIVER SWITCHING CHARACTERISTICS
MAX13083E/MAX13084E/MAX13089E WITH SRL = VCC (500kbps)
(VCC = +5.0V ±10%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
tDPLH 200 1000
Driver Propagation Delay tDPHL
CL = 50pF, RL = 54Ω, Figures 2 and 3 200 1000 ns
Driver Differential Output Rise or
Fall Time tR , tFCL = 50pF, RL = 54Ω, Figures 2 and 3 250 900 ns
Differential Driver Output Skew
|tDPLH - tDPHL|tDSKEW CL = 50pF, RL = 54Ω, Figures 2 and 3 140 ns
Maximum Data Rate 500 kbps
Driver Enable to Output High tDZH Figure 4 2500 ns
Driver Enable to Output Low tDZL Figure 5 2500 ns
Driver Disable Time from Low tDLZ Figure 5 100 ns
Driver Disable Time from High tDHZ Figure 4 100 ns
Driver Enable from Shutdown to
Output High tDZH
(
SHDN
)
Figure 4 5500 ns
Driver Enable from Shutdown to
Output Low tDZL
(
SHDN
)
Figure 5 5500 ns
Time to Shutdown tSHDN 50 340 700 ns
RECEIVER SWITCHING CHARACTERISTICS
MAX13083E/MAX13084E/MAX13089E WITH SRL = VCC (500kbps)
(VCC = +5.0V ±10%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
tRPLH 200
Receiver Propagation Delay tRPHL
CL = 15pF, Figures 6 and 7 200 ns
Receiver Output Skew
|tRPLH - tRPHL|tRSKEW CL = 15pF, Figures 6 and 7 30 ns
Maximum Data Rate 500 kbps
Receiver Enable to Output Low tRZL Figure 8 50 ns
Receiver Enable to Output High tRZH Figure 8 50 ns
Receiver Disable Time from Low tRLZ Figure 8 50 ns
Receiver Disable Time from High tRHZ Figure 8 50 ns
Receiver Enable from Shutdown
to Output High tRZH
(
SHDN
)
Figure 8 5500 ns
Receiver Enable from Shutdown
to Output Low tRZL
(
SHDN
)
Figure 8 5500 ns
Time to Shutdown tSHDN 50 340 700 ns
Maxim Integrated
5
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
DRIVER SWITCHING CHARACTERISTICS
MAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)
(VCC = +5.0V ±10%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
tDPLH 50
Driver Propagation Delay tDPHL
CL = 50pF, RL= 54Ω, Figures 2 and 3 50 ns
Driver Differential Output Rise or
Fall Time tR , tFCL = 50pF, RL= 54Ω, Figures 2 and 3 15 ns
Differential Driver Output Skew
|tDPLH - tDPHL|tDSKEW CL = 50pF, RL= 54Ω, Figures 2 and 3 8 ns
Maximum Data Rate 16 Mbps
Driver Enable to Output High tDZH Figure 4 150 ns
Driver Enable to Output Low tDZL Figure 5 150 ns
Driver Disable Time from Low tDLZ Figure 5 100 ns
Driver Disable Time from High tDHZ Figure 4 100 ns
Driver Enable from Shutdown to
Output High tDZH
(
SHDN
)
Figure 4 2200 ns
Driver Enable from Shutdown to
Output Low tDZL
(
SHDN
)
Figure 5 2200 ns
Time to Shutdown tSHDN 50 340 700 ns
RECEIVER SWITCHING CHARACTERISTICS
MAX13086E/MAX13087E/MAX13088E/MAX13089E WITH SRL = GND (16Mbps)
(VCC = +5.0V ±10%, TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
tRPLH 50 80
Receiver Propagation Delay tRPHL
CL = 15pF, Figures 6 and 7 50 80 ns
Receiver Output Skew
|tRPLH - tRPHL|tRSKEW CL = 15pF, Figures 6 and 7 13 ns
Maximum Data Rate 16 Mbps
Receiver Enable to Output Low tRZL Figure 8 50 ns
Receiver Enable to Output High tRZH Figure 8 50 ns
Receiver Disable Time from Low tRLZ Figure 8 50 ns
Receiver Disable Time from High tRHZ Figure 8 50 ns
Receiver Enable from Shutdown
to Output High tRZH
(
SHDN
)
Figure 8 2200 ns
Receiver Enable from Shutdown
to Output Low tRZL
(
SHDN
)
Figure 8 2200 ns
Time to Shutdown tSHDN 50 340 700 ns
Note 1: All currents into the device are positive. All currents out of the device are negative. All voltages are referred to device ground,
unless otherwise noted.
Note 2: ΔVOD and ΔVOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 3: The short-circuit output current applies to peak current just prior to foldback current limiting. The short-circuit foldback output
current applies during current limiting to allow a recovery from bus contention.
6
Maxim Integrated
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
0.80
0.90
1.50
1.10
1.00
1.20
1.30
1.40
1.60
-40 -10 5 20-25 35 50 9580 11065 125
SUPPLY CURRENT vs. TEMPERATURE
MAX13080E-89E toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
NO LOAD
DE = VCC
DE = 0
0
20
10
40
30
50
60
021345
OUTPUT CURRENT
vs. RECEIVER OUTPUT-HIGH VOLTAGE
MAX13080E-89E toc02
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
0
20
10
40
30
60
50
70
021345
OUTPUT CURRENT
vs. RECEIVER OUTPUT-LOW VOLTAGE
MAX13080E-89E toc03
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
4.0
4.4
4.2
4.8
4.6
5.2
5.0
5.4
RECEIVER OUTPUT-HIGH VOLTAGE
vs. TEMPERATURE
MAX13080E-89E toc04
TEMPERATURE (°C)
OUTPUT HIGH VOLTAGE (V)
IO = -1mA
-40 -10520-25 35 50 9580 11065 125
0
0.1
0.7
0.3
0.2
0.4
0.5
0.6
0.8
RECEIVER OUTPUT-LOW VOLTAGE
vs. TEMPERATURE
MAX13080E-89E toc05
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)
IO = 1mA
-40 -10 5 20-25 35 50 9580 11065 125
0
20
40
60
80
100
120
140
160
012345
DRIVER DIFFERENTIAL OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
MAX13080E-89E toc06
DIFFERENTIAL OUTPUT VOLTAGE (V)
DIFFERENTIAL OUTPUT CURRENT (mA)
2.0
2.8
2.4
3.6
3.2
4.4
4.0
4.8
DRIVER DIFFERENTIAL OUTPUT
VOLTAGE vs. TEMPERATURE
MAX13080E-89E toc07
DIFFERENTIAL OUTPUT VOLTAGE (V)
RL = 54Ω
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
0
40
20
100
80
60
120
140
180
160
200
-7 -5 -4-6 -3 -2 -1 0 1 2 3 54
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-HIGH VOLTAGE
MAX13080E-89E toc08
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
0
60
40
20
80
100
120
140
160
180
200
042681012
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-LOW VOLTAGE
MAX13080E-89E toc09
OUTPUT-LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
Typical Operating Characteristics
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
Maxim Integrated
7
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
0
2
1
5
4
3
6
7
9
8
10
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX13080E-89E toc10
SHUTDOWN CURRENT (μA)
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
600
800
700
1000
900
1100
1200
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (250kbps)
MAX13080E-89E toc11
DRIVER PROPAGATION DELAY (ns)
tDPHL
tDPLH
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
300
400
350
500
450
550
600
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (500kbps)
MAX13080E-89E toc12
DRIVER PROPAGATION DELAY (ns)
tDPHL
tDPLH
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
0
10
70
30
20
40
50
60
80
DRIVER PROPAGATION DELAY
vs. TEMPERATURE (16Mbps)
MAX13080E-89E toc13
DRIVER PROPAGATION DELAY (ns)
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
tDPHL
tDPLH
0
40
20
100
80
60
120
140
160
180
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE (250kpbs AND 500kbps)
MAX13080E-89E toc14
RECEIVER PROPAGATION DELAY (ns)
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
tDPHL
tDPLH
0
40
20
100
80
60
120
140
160
180
RECEIVER PROPAGATION DELAY
vs. TEMPERATURE (16Mbps)
MAX13080E-89E toc15
RECEIVER PROPAGATION DELAY (ns)
-40 -10 5 20-25 35 50 9580 11065 125
TEMPERATURE (°C)
tDPHL
tDPLH
2μs/div
DRIVER PROPAGATION DELAY (250kbps)
DI
2V/div
VY - VZ
5V/div
MAX13080E-89E toc16
RL = 100Ω
200ns/div
RECEIVER PROPAGATION DELAY
(250kbps AND 500kbps)
VA - VB
5V/div
RO
2V/div
MAX13080E-89E toc17
RL = 100Ω
Typical Operating Characteristics (continued)
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
8
Maxim Integrated
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Test Circuits and Waveforms
400ns/div
DRIVER PROPAGATION DELAY (500kbps)
DI
2V/div
MAX13080E-89E toc18
RL = 100Ω
VY - VZ
5V/div
10ns/div
DRIVER PROPAGATION DELAY (16Mbps)
DI
2V/div
MAX13080E-89E toc19
RL = 100Ω
VY
2V/div
VZ
2V/div
40ns/div
RECEIVER PROPAGATION DELAY (16Mbps)
VB
2V/div
MAX13080E-89E toc20
RL = 100Ω
RO
2V/div
VA
2V/div
Typical Operating Characteristics (continued)
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
Y
Z
VOD
VOC
RL/2
RL/2
Figure 1. Driver DC Test Load
DI
DE
VCC
Z
Y
VOD RLCL
Figure 2. Driver Timing Test Circuit
DI
VCC
0
Z
Y
VO
0
-VO
VO
VCC/2
tDPLH tDPHL
1/2 VO
10%
tR
90% 90%
1/2 VO
10%
tF
VDIFF = V (Y) - V (Z)
VDIFF
tSKEW = | tDPLH - tDPHL |
Figure 3. Driver Propagation Delays
Maxim Integrated
9
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Test Circuits and Waveforms (continued)
DE
OUT
tDHZ
0
VCC
VCC / 2
0.25V
0
VOH
GENERATOR
0 OR VCC
S1
50Ω
DOUT
tDZH, tDZH(SHDN)
VOM = (0 + VOH) / 2
RL = 500Ω
CL
50pF
Figure 4. Driver Enable and Disable Times (tDHZ, tDZH, tDZH(SHDN))
DE
VCC
OUT
tDLZ
0
VCC
VCC / 2
GENERATOR
0 OR VCC
S1
50Ω
DOUT
tDZL, tDZL(SHDN)
VOM = (VOL + VCC) / 2
RL = 500Ω
CL
50pF
VOL 0.25V
VCC
Figure 5. Driver Enable and Disable Times (tDZL, tDLZ, tDLZ(SHDN))
10
Maxim Integrated
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Test Circuits and Waveforms (continued)
VID R
B
A
RECEIVER
OUTPUT
ATE
Figure 6. Receiver Propagation Delay Test Circuit
A
B
RO
VOH
VCC/2
tRPLH
tRPHL
VOL
+1V
-1V
THE RISE TIME AND FALL TIME OF INPUTS A AND B < 4ns
Figure 7. Receiver Propagation Delays
S1 OPEN
S2 CLOSED
S3 = +1.5V
RO
VCC
0
0
VOH
VOH / 2
S1 OPEN
S2 CLOSED
S3 = +1.5V
tRHZ
VCC
0
0
VOH
0.25V
VCC/2
S1 CLOSED
S2 OPEN
S3 = -1.5V
VCC
0
VOL
VCC
VCC/2
S1 CLOSED
S2 OPEN
S3 = -1.5V
tRLZ
VCC
0
VOL
VCC
0.25V
GENERATOR
VCC
+1.5V
1kΩ
CL
15pF S2
S1
50Ω
S3
-1.5V R
VID
RE
RO
RE
RO
RE
RO
RE
tRZH, tRZH(SHDN) tRZL, tRZL(SHDN)
(VOL + VCC) / 2
VCC/2
Figure 8. Receiver Enable and Disable Times
Maxim Integrated
11
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Pin Description
PIN
MAX13080E
MAX13083E
MAX13086E
MAX13081E
MAX13084E
MAX13087E
MAX13082E
MAX13088E MAX13089E
FULL-DUPLEX
DEVICES
HALF-
DUPLEX
DEVICES
FULL-
DUPLEX
MODE
HALF-
DUPLEX
MODE
NAME FUNCTION
1, 8, 13 — — — — N.C. No Connect. Not internally connected, can be connected
to GND.
———11H/F
Half-/Full-Duplex Select Input. Connect H/F to VCC for
half-duplex mode; connect H/F to GND or leave
unconnected for full-duplex mode.
22122RO
Receiver Output. When RE is low and if (A - B) ≥ -50mV,
RO is high; if (A - B) ≤ -200mV, RO is low.
3—233RE
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—344DE
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).
53455DI
D r i ver Inp ut. W i th D E hi g h, a l ow on D I for ces noni nver ti ng
outp ut l ow and i nver ti ng outp ut hi g h. S i m i l ar l y, a hi g h on D I
for ces noni nver ti ng outp ut hi g h and i nver ti ng outp ut l ow .
— — — 6 6 SRL
Slew-Rate Limit Selector Input. Connect SRL to ground for
16Mbps communication rate; connect SRL to VCC for
500kbps communication rate. Leave SRL unconnected for
250kbps communication rate.
6, 7 4 5 7 7 GND Ground
— — — 8 8 TXP
Tr ansm i tter P hase. C onnect TX P to g r ound or l eave TX P
unconnected for nor m al tr ansm i tter p hase/p ol ar i ty. C onnect
TX P to V
C C
to i nver t the tr ansm i tter p hase/p ol ar i ty.
9 5 — 9 — Y Noninverting Driver Output
————9Y
Noninverting Driver Output and Noninverting Receiver
Input*
10 6 — 10 — Z Inverting Driver Output
— — — — 10 Z Inverting Driver Output and Inverting Receiver Input*
11 7 — 11 — B Inverting Receiver Input
— — — — 11 B Receiver Input Resistors*
— — 7 — — B Inverting Receiver Input and Inverting Driver Output
12
Maxim Integrated
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
MAX13080E/MAX13083E/MAX13086E
Pin Description (continued)
PIN
MAX13080E
MAX13083E
MAX13086E
MAX13081E
MAX13084E
MAX13087E
MAX13082E
MAX13088E MAX13089E
FULL-DUPLEX
DEVICES
HALF-
DUPLEX
DEVICES
FULL-
DUPLEX
MODE
HALF-
DUPLEX
MODE
NAME FUNCTION
12 8 — 12 — A Noninverting Receiver Input
— — — — 12 A Receiver Input Resistors*
—— 6——A
Noninverting Receiver Input and Noninverting Driver
Output
— — — 13 13 RXP
Receiver Phase. Connect RXP to GND or leave RXP
unconnected for normal transmitter phase/polarity.
Connect RXP to VCC to invert receiver phase/polarity.
14 1 8 14 14 VCC Positive Supply VCC = +5.0V ±10%. Bypass VCC to GND
with a 0.1µF capacitor.
*
MAX13089E only. In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) still have a
1/8-unit load (96k
Ω
), but are not connected to the receiver.
TRANSMITTING
INPUTS OUTPUTS
RE DE DI Z Y
X1101
X1010
0 0 X High-Z High-Z
1 0 X Shutdown
RECEIVING
INPUTS OUTPUT
RE DE A, B RO
0X≥ -50mV 1
0X≤ -200mV 0
0X
Open/
shorted 1
1 1 X High-Z
1 0 X Shutdown
MAX13081E/MAX13084E/MAX13086E/
MAX13087E
TRANSMITTING
INPUT OUTPUTS
DI Z Y
101
010
RECEIVING
INPUTS OUTPUT
A, B RO
≥ -50mV 1
≤ -200mV 0
Open/shorted 1
Function Tables
Maxim Integrated
13
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
MAX13082E/MAX13088E
TRANSMITTING
INPUTS OUTPUTS
RE DE DI B/Z A/Y
X1101
X1010
0 0 X High-Z High-Z
1 0 X Shutdown
Function Tables (continued)
MAX13089E
TRANSMITTING
INPUTS OUTPUTS
TXP RE DE DI Z Y
0X1101
0X1010
1X1110
1X1001
X 0 0 X High-Z High-Z
X 1 0 X Shutdown
RECEIVING
INPUTS OUTPUTS
H/FRXP RE DE A, B Y, Z RO
0 0 0 X > -50mV X 1
0 0 0 X < -200mV X 0
0 1 0 X > -50mV X 0
0 1 0 X < -200mV X 1
1000X> -50mV 1
1000X< -200mV 0
1100X> -50mV 0
1100X< -200mV 1
0 0 0 X Open/shorted X 1
1000XOpen/shorted 1
0 1 0 X Open/shorted X 0
1100XOpen/shorted 0
X X 1 1 X X High-Z
X X 1 0 X X Shutdown
RECEIVING
INPUTS OUTPUTS
RE DE A-B RO
0X≥ -50mV 1
0X≤ -200mV 0
0X
Open/
shorted 1
1 1 X High-Z
1 0 X Shutdown
X = Don’t care; shutdown mode, driver, and receiver outputs are high impedance.
14
Maxim Integrated
Detailed Description
The MAX13080E–MAX13089E high-speed transceivers
for RS-485/RS-422 communication contain one driver
and one receiver. These devices feature fail-safe circuit-
ry, which guarantees a logic-high receiver output when
the receiver inputs are open or shorted, or when they
are connected to a terminated transmission line with all
drivers disabled (see the
Fail-Safe
section). The
MAX13080E/MAX13082E/MAX13083E/MAX13086E/
MAX13088E/MAX13089E also feature a hot-swap capa-
bility allowing line insertion without erroneous data trans-
fer (see the
Hot Swap Capability
section). The
MAX13080E/MAX13081E/MAX13082E feature reduced
slew-rate drivers that minimize EMI and reduce reflec-
tions caused by improperly terminated cables, allowing
error-free data transmission up to 250kbps. The
MAX13083E/MAX13084E also offer slew-rate limits
allowing transmit speeds up to 500kbps. The
MAX13086E/MAX13087E/MAX13088Es’ driver slew
rates are not limited, making transmit speeds up to
16Mbps possible. The MAX13089E’s slew rate is selec-
table between 250kbps, 500kbps, and 16Mbps by dri-
ving a selector pin with a three-state driver.
The MAX13082E/MAX13088E are half-duplex transceivers,
while the MAX13080E/MAX13081E/ MAX13083E/
MAX13084E/MAX13086E/MAX13087E are full-duplex
transceivers. The MAX13089E is selectable between
half- and full-duplex communication by driving a selec-
tor pin (H/F) high or low, respectively.
All devices operate from a single +5.0V supply. Drivers
are output short-circuit current limited. Thermal-shutdown
circuitry protects drivers against excessive power dissi-
pation. When activated, the thermal-shutdown circuitry
places the driver outputs into a high-impedance state.
Receiver Input Filtering
The receivers of the MAX13080E–MAX13084E, and the
MAX13089E when operating in 250kbps or 500kbps
mode, incorporate input filtering in addition to input
hysteresis. This filtering enhances noise immunity with
differential signals that have very slow rise and fall
times. Receiver propagation delay increases by 25%
due to this filtering.
Fail-Safe
The MAX13080E family guarantees a logic-high receiver
output when the receiver inputs are shorted or open, or
when they are connected to a terminated transmission
line with all drivers disabled. This is done by setting 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. If (A - B) is less
than or equal to -200mV, RO is logic-low. In the case of a
terminated bus with all transmitters disabled, the receiv-
er’s differential input voltage is pulled to 0V by the termi-
nation. With the receiver thresholds of the MAX13080E
family, this results in a logic-high with a 50mV minimum
noise margin. Unlike previous fail-safe devices, the
-50mV to -200mV threshold complies with the ±200mV
EIA/TIA-485 standard.
Hot-Swap Capability (Except
MAX13081E/MAX13084E/MAX13087E)
Hot-Swap Inputs
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 inser-
tion, 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 proces-
sor’s logic drivers could cause standard CMOS enable
inputs of a transceiver to drift to an incorrect logic level.
Additionally, parasitic circuit board capacitance could
cause coupling of VCC or GND to the enable inputs.
Without the hot-swap capability, these factors could
improperly enable the transceiver’s driver or receiver.
When VCC rises, an internal 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.
Hot-Swap Input Circuitry
The enable inputs feature hot-swap capability. At the
input there are two NMOS devices, M1 and M2
(Figure 9). When VCC ramps from zero, an internal 7µs
timer turns on M2 and sets the SR latch, which also
turns on M1. Transistors M2, a 500µA current sink, and
M1, a 100µA current sink, pull DE to GND through a
5kΩresistor. M2 is designed to pull DE to the disabled
state against an external parasitic capacitance up to
100pF that can drive DE high. After 7µs, the timer
deactivates M2 while M1 remains on, holding DE low
against three-state leakages that can drive DE high. M1
remains on until an external source overcomes the
required input current. At this time, the SR latch resets
and M1 turns off. When M1 turns off, DE reverts to a
standard, high-impedance CMOS input. Whenever VCC
drops below 1V, the hot-swap input is reset.
For RE there is a complementary circuit employing two
PMOS devices pulling RE to VCC.
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Maxim Integrated
15
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
MAX13089E Programming
The MAX13089E has several programmable operating
modes. Transmitter rise and fall times are programma-
ble, resulting in maximum data rates of 250kbps,
500kbps, and 16Mbps. To select the desired data rate,
drive SRL to one of three possible states by using a
three-state driver: VCC, GND, or unconnected. For
250kbps operation, set the three-state device in high-
impedance mode or leave SRL unconnected. For
500kbps operation, drive SRL high or connect it to VCC.
For 16Mbps operation, drive SRL low or connect it to
GND. SRL can be changed during operation without
interrupting data communications.
Occasionally, twisted-pair lines are connected backward
from normal orientation. The MAX13089E has two pins
that invert the phase of the driver and the receiver to cor-
rect this problem. For normal operation, drive TXP and
RXP low, connect them to ground, or leave them uncon-
nected (internal pulldown). To invert the driver phase,
drive TXP high or connect it to VCC. To invert the receiver
phase, drive RXP high or connect it to VCC. Note that the
receiver threshold is positive when RXP is high.
The MAX13089E can operate in full- or half-duplex
mode. Drive H/Flow, leave it unconnected (internal
pulldown), or connect it to GND for full-duplex opera-
tion. Drive H/Fhigh for half-duplex operation. In full-
duplex mode, the pin configuration of the driver and
receiver is the same as that of a MAX13080E. In half-
duplex mode, the receiver inputs are internally connect-
ed to the driver outputs through a resistor-divider. This
effectively changes the function of the device’s outputs.
Y becomes the noninverting driver output and receiver
input, Z becomes the inverting driver output and receiver
input. In half-duplex mode, A and B are still connected to
ground through an internal resistor-divider but they are
not internally connected to the receiver.
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures
are incorporated on all pins to protect against electro-
static discharges encountered during handling and
assembly. The driver outputs and receiver inputs of the
MAX13080E family of devices have extra protection
against static electricity. Maxim’s engineers have devel-
oped state-of-the-art structures to protect these pins
against ESD of ±15kV without damage. The ESD struc-
tures withstand high ESD in all states: normal operation,
shutdown, and powered down. After an ESD event, the
MAX13080E family keep working without latchup or
damage.
ESD protection can be tested in various ways. The
transmitter outputs and receiver inputs of the
MAX13080E family are characterized for protection to
the following limits:
•±15kV using the Human Body Model
•±6kV using the Contact Discharge method specified
in IEC 61000-4-2
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.
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
1.5kΩresistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. However, it does
not specifically refer to integrated circuits. The
MAX13080E family of devices helps you design equip-
ment to meet IEC 61000-4-2, without the need for addi-
tional ESD-protection components.
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
DE DE
(HOT SWAP)
5kΩ
TIMER
TIMER
VCC
10μs
M2M1
500μA
100μA
SR LATCH
Figure 9. Simplified Structure of the Driver Enable Pin (DE)
16
Maxim Integrated
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.
Machine Model
The machine model for ESD tests all pins using a
200pF storage capacitor and zero discharge resis-
tance. The objective is to emulate the stress caused
when I/O pins are contacted by handling equipment
during test and assembly. Of course, all pins require
this protection, not just RS-485 inputs and outputs.
Applications Information
256 Transceivers on the Bus
The standard RS-485 receiver input impedance is 12kΩ
(1-unit load), and the standard driver can drive up to 32-
unit loads. The MAX13080E family of transceivers has a
1/8-unit load receiver input impedance (96kΩ), allowing
up to 256 transceivers to be connected in parallel on one
communication line. Any combination of these devices,
as well as other RS-485 transceivers with a total of 32-
unit loads or fewer, can be connected to the line.
Reduced EMI and Reflections
The MAX13080E/MAX13081E/MAX13082E feature
reduced slew-rate drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables, allowing error-free data transmission up to
250kbps. The MAX13083E/MAX13084E offer higher dri-
ver output slew-rate limits, allowing transmit speeds up
to 500kbps. The MAX13089E with SRL = VCC or uncon-
nected are slew-rate limited. With SRL unconnected,
the MAX13089E error-free data transmission is up to
250kbps. With SRL connected to VCC, the data transmit
speeds up to 500kbps.
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC
1MΩ
RD
1500Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 10a. Human Body ESD Test Model
IP 100%
90%
36.8%
tRL TIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
0
AMPS
Figure 10b. Human Body Current Waveform
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
150pF
RC
50MΩ TO 100MΩ
RD
330Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 10c. IEC 61000-4-2 ESD Test Model
tr = 0.7ns TO 1ns 30ns
60ns
t
100%
90%
10%
I
PEAK
I
Figure 10d. IEC 61000-4-2 ESD Generator Current Waveform
Maxim Integrated
17
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
Low-Power Shutdown Mode (Except
MAX13081E/MAX13084E/MAX13087E)
Low-power shutdown mode is initiated by bringing both
RE high and DE low. In shutdown, the devices typically
draw only 2.8µA of supply current.
RE and DE can be driven simultaneously; the devices
are guaranteed not to enter shutdown if RE is high and
DE is low for less than 50ns. If the inputs are in this
state for at least 700ns, the devices are guaranteed to
enter shutdown.
Enable times tZH and tZL (see the
Switching
Characteristics
section) assume the devices were not in
a low-power shutdown state. Enable times tZH(SHDN) and
tZL(SHDN) assume the devices were in shutdown state. It
takes drivers and receivers longer to become enabled
from low-power shutdown mode (tZH(SHDN), tZL(SHDN))
than from driver/receiver-disable mode (tZH, tZL).
Driver Output Protection
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus contention.
The first, a foldback current limit on the output stage,
provides immediate protection against short circuits over
the whole common-mode voltage range (see the
Typical
Operating Characteristics
). The second, a thermal-shut-
down circuit, forces the driver outputs into a high-imped-
ance state if the die temperature exceeds +175°C (typ).
Line Length
The RS-485/RS-422 standard covers line lengths up to
4000ft. For line lengths greater than 4000ft, use the
repeater application shown in Figure 11.
Typical Applications
The MAX13082E/MAX13088E/MAX13089E transceivers
are designed for bidirectional data communications on
multipoint bus transmission lines. Figures 12 and 13
show typical network applications circuits.
To minimize reflections, terminate the line at both ends
in its characteristic impedance, and keep stub lengths
off the main line as short as possible. The slew-rate-lim-
ited MAX13082E and the two modes of the MAX13089E
are more tolerant of imperfect termination.
Chip Information
PROCESS: BiCMOS
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
RO
DI
DE
R
D
MAX13080E/MAX13081E/MAX13083E/
MAX13084E/MAX13086E/MAX13087E/
MAX13089E (FULL DUPLEX)
RE 120Ω
120Ω
A
B
Z
Y
DATA IN
DATA OUT
Figure 11. Line Repeater for MAX13080E/MAX13081E/
MAX13083E/MAX13084E/MAX13086E/MAX13087E/MAX13089E
in Full-Duplex Mode
DI RO DE
A
B
RE
RO
RO
RO
DI
DI
DI
DE
DE
DE
DD
D
R
R
R
BB
B
AAA
120Ω120Ω
D
R
MAX13082E
MAX13088E
MAX13089E (HALF DUPLEX)
RERE
RE
Figure 12. Typical Half-Duplex RS-485 Network
18
Maxim Integrated
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
RO
DI
DE
R120Ω
120Ω
D
MAX13080E
MAX13081E
MAX13083E
MAX13084E
MAX13086E
MAX13087E
MAX31089E (FULL DUPLEX)
RE
RO
DI
DE
R
D
RE
120Ω
120Ω
A
B
Z
Y
A
B
Z
Y
RO
DI DE
R
D
RE
YZBA
RO
DI DE
R
D
RE
YZBA
NOTE: RE AND DE ON MAX13080E/MAX13083E/MAX13086E/MAX13089E ONLY.
Figure 13. Typical Full-Duplex RS-485 Network
Selector Guide
PART HALF/FULL
DUPLEX
DATA RATE
(Mbps)
SLEW-RATE
LIMITED
LOW-POWER
SHUTDOWN
RECEIVER/
DRIVER
ENABLE
TRANSCEIVERS
ON BUS PINS
MAX13080E Full 0.250 Yes Yes Yes 256 14
MAX13081E Full 0.250 Yes No No 256 8
MAX13082E Half 0.250 Yes Yes Yes 256 8
MAX13083E Full 0.5 Yes Yes Yes 256 14
MAX13084E Full 0.5 Yes No No 256 8
MAX13086E Full 16 No Yes Yes 256 14
MAX13087E Full 16 No No No 256 8
MAX13088E Half 16 No Yes Yes 256 8
MAX13089E Selectable Selectable Selectable Yes Yes 256 14
Maxim Integrated
19
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
MAX13080E
MAX13083E
MAX13086E
Rt
Rt
DE VCC
RE
GND
VCC RE
GND DE
RO
DI
9
10
12
11
B
A
Z
Y
0.1μF
5
RO
N.C.
DI
2
1, 8, 13
36, 7
14
4
VCC
N.C.
N.C.
A
B
Z
Y
N.C.
RO
RE
DE
DI
GND
GND
D
D
RD
R
TYPICAL FULL-DUPLEX OPERATING CIRCUIT
14
13
12
11
10
9
8
1
2
3
4
5
6
7
DIP/SO
R
Y
Z
A
B
Pin Configurations and Typical Operating Circuits
MAX13081E
MAX13084E
MAX13087E
Rt
Rt
VCC
GND
VCC
GND
RO
DI
5
6
8
7
B
A
Z
Y
0.1μF
3
RO
DI
2
4
1
R
D
D
RD
R
TYPICAL FULL-DUPLEX OPERATING CIRCUIT
VCC
RO
DI
GND
A
B
Z
Y
8
7
6
5
1
2
3
4
DIP/SO
Y
Z
A
B
MAX13082E
MAX13088E
Rt
Rt
DE
RE
A
B
A
B
0.1μF
TYPICAL HALF-DUPLEX OPERATING CIRCUIT
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORMS DIAGRAMS.
SEE PINS A AND B WHEN DE IS HIGH.
R
D
RO
DI
VCC
B
A
GND
8
7
6
5
1
2
3
4
DIP/SO
RE
DE
R
D
RO
DI
VCC
GND
8
7
6
5
1
2
3
4
RE
DE
D
R
DI
RO
20
Maxim Integrated
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
14
13
12
11
10
9
8
1
2
3
4
5
6
7
MAX13089E
MAX13089E
DIP/SO
TOP VIEW
VCC
VCC
RXP
TXP
A
B
Z
Y
RO
DE
DI
SRL
GND
RE
H/F
RO
TXP
A
B
Z
Y
GND DE SRL
DI
H/F
RXP
NOTE: SWITCH POSITIONS
INDICATED FOR H/F = GND.
RE
Pin Configurations and Typical Operating Circuits (continued)
Maxim Integrated
21
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Ordering Information (continued)
PART TEMP RANGE PIN-PACKAGE
MAX13081ECPA+ 0°C to +70°C8 PDIP
MAX13081ECSA+ 0°C to +70°C8 SO
MAX13081EEPA+ -40°C to +85°C8 PDIP
MAX13081EESA+ -40°C to +85°C8 SO
MAX13081EAPA+ -40°C to +125°C8 PDIP
MAX13081EASA+ -40°C to +125°C8 SO
MAX13082ECPA+ 0°C to +70°C8 PDIP
MAX13082ECSA+ 0°C to +70°C8 SO
MAX13082EEPA+ -40°C to +85°C8 PDIP
MAX13082EESA+ -40°C to +85°C8 SO
MAX13082EAPA+ -40°C to +125°C8 PDIP
MAX13082EASA+ -40°C to +125°C8 SO
MAX13083ECPD+ 0°C to +70°C14 PDIP
MAX13083ECSD+ 0°C to +70°C14 SO
MAX13083EEPD+ -40°C to +85°C14 PDIP
MAX13083EESD+ -40°C to +85°C14 SO
MAX13083EAPD+ -40°C to +125°C14 PDIP
MAX13083EASD+ -40°C to +125°C14 SO
MAX13084ECPA+ 0°C to +70°C8 PDIP
MAX13084ECSA+ 0°C to +70°C8 SO
MAX13084EEPA+ -40°C to +85°C8 PDIP
MAX13084EESA+ -40°C to +85°C8 SO
MAX13084EAPA+ -40°C to +125°C8 PDIP
MAX13084EASA+ -40°C to +125°C8 SO
PART TEMP RANGE PIN-PACKAGE
MAX13086ECPD+ 0°C to +70°C14 PDIP
MAX13086ECSD+ 0°C to +70°C14 SO
MAX13086EEPD+ -40°C to +85°C14 PDIP
MAX13086EESD+ -40°C to +85°C14 SO
MAX13086EAPD+ -40°C to +125°C14 PDIP
MAX13086EASD+ -40°C to +125°C14 SO
MAX13087ECPA+ 0°C to +70°C8 PDIP
MAX13087ECSA+ 0°C to +70°C8 SO
MAX13087EEPA+ -40°C to +85°C8 PDIP
MAX13087EESA+ -40°C to +85°C8 SO
MAX13087EAPA+ -40°C to +125°C8 PDIP
MAX13087EASA+ -40°C to +125°C8 SO
MAX13088ECPA+ 0°C to +70°C8 PDIP
MAX13088ECSA+ 0°C to +70°C8 SO
MAX13088EEPA+ -40°C to +85°C8 PDIP
MAX13088EESA+ -40°C to +85°C8 SO
MAX13088EAPA+ -40°C to +125°C8 PDIP
MAX13088EASA+ -40°C to +125°C8 SO
MAX13089ECPD+ 0°C to +70°C14 PDIP
MAX13089ECSD+ 0°C to +70°C14 SO
MAX13089EEPD+ -40°C to +85°C14 PDIP
MAX13089EESD+ -40°C to +85°C14 SO
MAX13089EAPD+ -40°C to +125°C14 PDIP
MAX13089EASD+ -40°C to +125°C14 SO
+
Denotes a lead(Pb)-free/RoHS-compliant package.
22
Maxim Integrated
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing per-
tains to the package regardless of RoHS status.
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO.
8 PDIP P8+2 21-0043 —
8 SO S8+4 21-0041 90-0096
14 PDIP P14+3 21-0043 —
14 SO S14+1 21-0041 90-0112
Maxim Integrated
23
MAX13080E–MAX13084E/
MAX13086E–MAX13089E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceivers
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
2 11/11 Deleted all reference to the MAX13085E
1, 2, 3, 5, 12. 13, 14,
15, 16, 17, 18, 19,
20, 22
24 Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
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. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
© 2011 Maxim Integrated The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.