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MAX3085ICN/a800avaiFail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers
MAX3087MAX N/a5avaiFail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers


MAX3085 ,Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = +5V ±5%, T = T to T , unless otherwise noted. Typical values are at ..
MAX3085CPA ,Fail-Safe / High-Speed 10Mbps / Slew-Rate-Limited RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = +5V ±5%, T = T to T , unless otherwise noted. Typical values are at ..
MAX3085CPA+ ,Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 TransceiversApplications:RS-485/RS-422 communication contain one driver andMAX3430: ±80V Fault-Protected, Fail- ..
MAX3085CSA ,Fail-Safe / High-Speed 10Mbps / Slew-Rate-Limited RS-485/RS-422 Transceiversfeatures independently programmable receiverand transmitter output phase via separate pins. MAX3080 ..
MAX3085CSA ,Fail-Safe / High-Speed 10Mbps / Slew-Rate-Limited RS-485/RS-422 TransceiversFeaturesThe MAX3080–MAX3089 high-speed transceivers for' True Fail-Safe Receiver While Maintaining ..
MAX3085CSA ,Fail-Safe / High-Speed 10Mbps / Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationsdrivers disabled.Industrial-Control Local Area NetworksAll devices have a 1/8-unit-load ..
MAX6326 ,3-Pin, Ultra-Low-Power SC70/SOTµP Reset CircuitsApplications MAX6346XR_ _-T -40°C to +85°C 3 SC70-3● Computers Power MonitoringMAX6346UR_ _-T -40°C ..
MAX6326-22D ,3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX6326-29D ,3-pin ultra-low power SC70/SOT microprocessor reset circuit
MAX6326UR22-T ,3-Pin, Ultra-Low-Power SC70/SOT レP Reset CircuitsMAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX634819-1294; Rev 3; 1/003-Pin, Ultra-Low-Power SC70/SOTµ ..
MAX6326UR26 ,3-Pin, Ultra-Low-Power SC70/SOT µP Reset CircuitsMAX6326/MAX6327/ 3-Pin, Ultra-Low-Power SC70/SOT MAX6328/MAX6346/ μP Reset CircuitsMAX6347/MAX6348
MAX6326UR26+T ,3-Pin, Ultra-Low-Power SC70/SOT µP Reset CircuitsMAX6326/MAX6327/ 3-Pin, Ultra-Low-Power SC70/SOT MAX6328/MAX6346/ μP Reset CircuitsMAX6347/MAX6348

MAX3085-MAX3087
Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers
AVAILABLE
EVALUATION KIT AVAILABLE
General Description
The MAX3080–MAX3089 high-speed transceivers for
RS-485/RS-422 communication contain one driver and
one receiver. These devices feature fail-safe circuitry,
which guarantees a logic-high receiver output when the
receiver inputs are open or shorted. This means that
the receiver output will be a logic high if all transmitters
on a terminated bus are disabled (high impedance).
The MAX3080/MAX3081/MAX3082 feature reduced
slew-rate drivers that minimize EMI and reduce reflec-
tions caused by improperly terminated cables, allowing
error-free data transmission up to 115kbps. The
MAX3083/MAX3084/MAX3085 offer higher driver out-
put slew-rate limits, allowing transmit speeds up to
500kbps. The MAX3086/MAX3087/MAX3088’s driver
slew rates are not limited, making transmit speeds up
to 10Mbps possible. The MAX3089’s slew rate is
selectable between 115kbps, 500kbps, and 10Mbps
by driving a selector pin with a single three-state driver.
These transceivers typically draw 375µA of supply
current when unloaded, or when fully loaded with the
drivers disabled.
All devices have a 1/8-unit-load receiver input imped-
ance that allows up to 256 transceivers on the bus. The
MAX3082/MAX3085/MAX3088 are intended for half-
duplex communications, while the MAX3080/MAX3081/
MAX3083/MAX3084/MAX3086/MAX3087 are intended
for full-duplex communications. The MAX3089 is selec-
table between half-duplex and full-duplex operation. It
also features independently programmable receiver
and transmitter output phase via separate pins.
Next Generation Device FeaturesFor Fault-Tolerant Applications:
MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4-
Unit Load, +3.3V RS-485 TransceiverFor Low-Voltage Applications:
MAX3362: +3.3V, High-Speed, RS-485/RS-422
Transceiver in a SOT23 PackageFor Multiple Transceiver Applications:
MAX3030E–MAX3033E: ±15kV ESD-Protected,
+3.3V, Quad, RS-422 Transmitters
MAX3040–MAX3045: ±10kV ESD-Protected, Quad,
+5V, RS-485/RS-422 Transmitters
Applications
RS-422/RS-485 Communications
Level Translators
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
Selection Table
*Pin-compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13.
Ordering Information continued at end of data sheet.
Ordering Information
PART
MAX3080CSD
MAX3080CPD
MAX3080ESD-40°C to +85°C
0°C to +70°C
0°C to +70°C
TEMP RANGEPIN-PACKAGE
14 SO
14 Plastic DIP
14 SO
MAX3080EPD-40°C to +85°C14 Plastic DIP
PartHalf/Full
Duplex
Data
Rate
(Mbps)
Slew
Rate
Limited
Low-
Power
Shutdown
Receiver/
Driver
Enable
Quiescent
Current
(µA)
Transceivers
Bus
Pin
Count
Industry-
Standard
Pinout
MAX3080Full0.115YesYesYes3752561475180
MAX3081Full0.115YesNoNo375256875179
MAX3082Half0.115YesYesYes375256875176
MAX3083Full0.5YesYesYes3752561475180
MAX3084Full0.5YesNoNo375256875179
MAX3085Half0.5YesYesYes375256875176
MAX3086Full10NoYesYes3752561475180
MAX3087Full10NoNoNo375256875179
MAX3088Half10NoYesYes375256875176
MAX3089SelectableSelectableSelectableYesYes3752561475180*
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V 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.
Supply Voltage (VCC) ............................................................+7V
Control Input Voltage (RE, DE)...................-0.3V to (VCC+ 0.3V)
Special Input Voltage
(H/F, SRL, TXP, RXP)..................................-0.3V to (VCC+ 0.3V)
Driver Input Voltage (DI).............................-0.3V to (VCC+ 0.3V)
Driver Output Voltage (A, B, Y, Z)........................................±13V
Receiver Input Voltage (A, B)..............................................±13V
Receiver Input Voltage, Full Duplex (A, B)..........................±25V
Receiver Output Voltage (RO)....................-0.3V to (VCC+ 0.3V)
Continuous Power Dissipation
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)...727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
14-Pin Plastic DIP (derate 10.0mW/°C above +70°C)....800mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
Operating Temperature Ranges
MAX308_C_ _.....................................................0°C to +70°C
MAX308_E_ _...................................................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Figure 5, R = 50Ω(RS-422)
DE = GND,
VCC= GND or 5.25V
DE = GND,
VCC= GND or 5.25V
H/F, TXP, RXP, internal pulldown
DE, DI, RE
SRL = VCC
SRL
MAX3080–MAX3085, and MAX3089 with
SRL = VCCor unconnected
DE, DI, RE, H/F, TXP, RXP
Figure 5, R = 50Ωor R = 27Ω
Figure 5, R = 50Ωor R = 27Ω
Figure 5, R = 50Ωor R = 27Ω
SRL (Note 3)
DE, DI, RE, H/F, TXP, RXP
SRL
CONDITIONS125IOOutput Leakage (Y and Z)
Full Duplex125IIN4Input Current (A and B)
Full Duplex75IIN3SRL Input Current0.8VIL2Input Low Voltage0.4VCC0.6VCCVIM2Input Middle VoltageVCC- 0.8VIH2Input High Voltage2.0VOD2Differential Driver Output 40IIN2µA±2IIN1SRL Input Current100VHYSDI Input Hysteresis0.8VIL1Input Low Voltage0.2∆VOD
Change in Magnitude of
Differential Output Voltage
(Note 2)3VOCDriver Common-Mode Output
Voltage0.2∆VOCChange In Magnitude of
Common-Mode Voltage (Note 2)2.0VIH1Input High Voltage
UNITSMINTYPMAXSYMBOLPARAMETER
Figure 5, R = 27Ω(RS-485)1.5
SRL = GND (Note 3)-75
VIN= 12V
VIN= 12V
VIN= -7V-100
-75VIN= -7V
Figure 5V5VOD1Differential Driver Output
(no load)VOD1Driver Short-Circuit Output
Current (Note 4)
DRIVER
-7V ≤VOUT ≤VCC-250
0V ≤VOUT ≤12V
0V ≤VOUT≤VCC±25
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.) (Note 1)
0V ≤VRO≤VCC
-7V ≤VCM≤+12V
0.4V ≤VO≤2.4V
-7V ≤VCM≤+12V= -4mA, VID= -50mV
DE = GND, VRE= VCC= 4mA, VID= -200mV
No load, = DI = GND
or VCC, SRL = VCC
CONDITIONS0.00110ISHDNSupply Current in Shutdown
Mode
ICCSupply Current±7±95IOSRReceiver Output Short-Circuit
Current96RINReceiver Input Resistance±1IOZRThree-State Output Current at
Receiver-200-125-50VTHReceiver Differential Threshold
Voltage25∆VTHReceiver Input HysteresisVCC-1.5VOHReceiver Output High Voltage0.4VOLReceiver Output Low Voltage
UNITSMINTYPMAXSYMBOLPARAMETER
No load, = DI = GND
or VCC, SRL = GND
DE = VCC
DE = VCC
DE = GND
DE = GND
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:∆VODand ∆VOCare the changes in VODand VOC, respectively, when the DI input changes state.
Note 3:The SRL pin is internally biased to VCC / 2 by a 100kΩ/100kΩresistor divider. It is guaranteed to be VCC / 2 if left
unconnected.
Note 4:Maximum current level applies to peak current just prior to foldback-current limiting; minimum current level applies during
current limiting.
RECEIVER
SUPPLY CURRENTSUPPLY CURRENT
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX3080–MAX3082, and MAX3089 with
SRL = Unconnected
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
Figures 6 and 12, CL= 100pF, S1 closed
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
Figures 6 and 12, CL= 100pF, S2 closed
Figures 8 and 10, CL= 15pF, S1 closed
Figures 8 and 10, CL= 15pF, S2 closed
Figures 6 and 12, CL= 100pF, S1 closed
Figures 11 and 13; |VID|≥2.0V;
rise and fall time of VID≤15ns
(Note 5)
Figures 6 and 12, CL= 100pF, S2 closed
Figures 11 and 13; |VID|≥2.0V;
rise and fall time of VID≤15ns
Figures 8 and 10, CL= 15pF, S2 closed
Figures 8 and 10, CL= 100pF, S2 closed
Figures 8 and 10, CL= 100pF, S1 closed
Figures 6 and 12, CL= 100pF, S1 closed
Figures 8 and 10, CL= 15pF, S1 closed
Figures 6 and 12, CL= 100pF, S2 closed
CONDITIONS3500tRZL(SHDN)Receiver Enable from Shutdown
to Output Low3500tRZH(SHDN)Receiver Enable from Shutdown
to Output High6000tDZL(SHDN)Driver Enable from Shutdown to
Output Low6000tDZH(SHDN)Driver Enable from Shutdown to
Output High50200600tSHDNTime to Shutdown2050tRHZReceiver Disable Time from
High2050tRLZReceiver Disable Time from Low2050tRZHReceiver Enable to Output High66713202500tDR, tDFDriver Rise or Fall Time-3±200tDSKEW50020302600tDPLHDriver Input to Output
Driver Output Skew tDPLH- tDPHL|2050tRZLReceiver Enable to Output Low3±30tRSKD|tRPLH- tRPHL|Differential
Receiver Skew127200tRPLH,
tRPHLReceiver Input to Output100tDHZDriver Disable Time from High
kbps115fMAXMaximum Data Rate3500tDZHDriver Enable to Output High3500tDZLDriver Enable to Output Low100tDLZDriver Disable Time from Low
UNITSMINTYPMAXSYMBOLPARAMETER
tDPHL50020302600
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX3083–MAX3085, and MAX3089 with SRL = VCC
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
Figures 6 and 12, CL= 100pF, S2 closed
Figures 8 and 10, CL= 15pF, S1 closed
Figures 8 and 10, CL= 15pF, S2 closed
Figures 6 and 12, CL= 100pF, S1 closed
Figures 11 and 13; |VID|≥2.0V;
rise and fall time of VID≤15ns
(Note 5)
Figures 6 and 12, CL= 100pF, S2 closed
Figures 11 and 13; |VID|≥2.0V;
rise and fall time of VID≤15ns
Figures 8 and 10, CL= 15pF, S2 closed
Figures 8 and 10, CL= 100pF, S2 closed
Figures 8 and 10, CL= 100pF, S1 closed
Figures 6 and 12, CL= 100pF, S1 closed
Figures 8 and 10, CL= 15pF, S1 closed
Figures 6 and 12, CL= 100pF, S2 closed
CONDITIONS3500tRZH(SHDN)Receiver Enable from Shutdown
to Output High4500tDZL(SHDN)Driver Enable from Shutdown to
Output Low4500tDZH(SHDN)Driver Enable from Shutdown to
Output High50200600tSHDNTime to Shutdown2050tRHZReceiver Disable Time from
High2050tRLZReceiver Disable Time from Low2050tRZHReceiver Enable to Output High200530750tDR, tDFDriver Rise or Fall Time-3±100tDSKEW2507201000tDPLHDriver Input to Output
Driver Output Skew tDPLH- tDPHL|2050tRZLReceiver Enable to Output Low3±30tRSKD|tRPLH- tRPHL|Differential
Receiver Skew127200tRPLH,
tRPHLReceiver Input to Output100tDHZDriver Disable Time from High
kbps500fMAXMaximum Data Rate2500tDZHDriver Enable to Output High2500tDZLDriver Enable to Output Low100tDLZDriver Disable Time from Low
UNITSMINTYPMAXSYMBOLPARAMETER
tDPHL
Figures 6 and 12, CL= 100pF, S1 closedns3500tRZL(SHDN)Receiver Enable from Shutdown
to Output Low
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
SWITCHING CHARACTERISTICS—MAX3086–MAX3088, and MAX3089 with SRL = GND
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
tDPHL
Figures 6 and 12, CL= 100pF, S1 closedns
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
3500tRZL(SHDN)
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
Receiver Enable from Shutdown
to Output Low
Figures 7 and 9, RDIFF= 54Ω,
CL1= CL2= 100pF
Figures 6 and 12, CL= 100pF, S2 closed
Figures 8 and 10, CL= 15pF, S1 closed
Figures 8 and 10, CL= 15pF, S2 closed
Figures 6 and 12, CL= 100pF, S1 closed
Figures 11 and 13; |VID|≥2.0V;
rise and fall time of VID≤15ns
(Note 5)
Figures 6 and 12, CL= 100pF, S2 closed
Figures 11 and 13; |VID|≥2.0V;
rise and fall time of VID≤15ns
Figures 8 and 10, CL= 15pF, S2 closed
Figures 8 and 10, CL= 100pF, S2 closed
Figures 8 and 10, CL= 100pF, S1 closed
Figures 6 and 12, CL= 100pF, S1 closed
Figures 8 and 10, CL= 15pF, S1 closed
Figures 6 and 12, CL= 100pF, S2 closed
CONDITIONS603500tRZH(SHDN)Receiver Enable from Shutdown
to Output High250tDZL(SHDN)Driver Enable from Shutdown to
Output Low250tDZH(SHDN)Driver Enable from Shutdown to
Output High50200600tSHDNTime to Shutdown2050tRHZReceiver Disable Time from
High2050tRLZReceiver Disable Time from Low2050tRZHReceiver Enable to Output High1425tDR, tDFDriver Rise or Fall Time-2.5±10tDSKEW3460tDPLHDriver Input to Output
Driver Output Skew tDPLH- tDPHL|2050tRZLReceiver Enable to Output Low0±10tRSKD|tRPLH- tRPHL|Differential
Receiver Skew106150tRPLH,
tRPHLReceiver Input to Output100tDHZDriver Disable Time from High
Mbps10fMAXMaximum Data Rate150tDZHDriver Enable to Output High150tDZLDriver Enable to Output Low100tDLZDriver Disable Time from Low
UNITSMINTYPMAXSYMBOLPARAMETER
Note 5:The device is put into shutdown by bringing REhigh and DE low. If the enable inputs are in this state for less than 50ns, the
device is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 600ns, the device is guaranteed
to have entered shutdown.
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
NO-LOAD SUPPLY CURRENT
vs. TEMPERATURE
MAX3080/3089 TOC-16
TEMPERATURE (°C)
NO-LOAD SUPPLY CURRENT (
A: MAX3086–MAX3088,
MAX3089 WITH
SRL = GND
B: MAX3080–MAX3085,
MAX3089 WITH
SRL = OPEN OR VCC
DE = VCC
DE = GND
OUTPUT CURRENT
vs. RECEIVER OUTPUT LOW VOLTAGE
MAX3080/3089 TOC-2
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
OUTPUT CURRENT
vs. RECEIVER OUTPUT HIGH VOLTAGE
MAX3080/3089 TOC-3
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX3080/3089 TOC-1
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)
RECEIVER OUTPUT LOW VOLTAGE
vs. TEMPERATURE
MAX3080/3089 TOC-5
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)
IRO = 8mA
RECEIVER OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
MAX3080/3089 TOC-4
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
IRO = 8mA
RECEIVER PROPAGATION DELAY
(500kbps MODE) vs. TEMPERATURE
MAX3080/3089 TOC-7
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
CLOAD = 100pF
RECEIVER PROPAGATION DELAY
(10Mbps MODE) vs. TEMPERATURE
MAX3080/3089 TOC-8
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
CLOAD = 100pF
DRIVER PROPAGATION DELAY
(115kbps MODE) vs. TEMPERATURE
MAX3080/3089 TOC-9
TEMPERATURE (°C)
PROPAGATION DELAY (ms)
Rt = 54Ω
Typical Operating Characteristics
(VCC= +5V, TA = +25°C, unless otherwise noted.)
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
Typical Operating Characteristics (continued)
(VCC= +5V, TA = +25°C, unless otherwise noted.)
DRIVER PROPAGATION DELAY
(500kbps MODE) vs. TEMPERATURE
MAX3080/3089 TOC-10
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
Rt = 54Ω
DRIVER PROPAGATION DELAY
(10Mbps MODE) vs. TEMPERATURE
MAX3080/3089 TOC-11
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
Rt = 54Ω
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
Rt = 54Ω
OUTPUT CURRENT vs.
DRIVER OUTPUT HIGH VOLTAGE
MAX3080/3089 TOC-27
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)42-6-40
DRIVER OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
MAX3080 TOC-12
DIFFERENTIAL OUTPUT VOLTAGE (V)
OUTPUT CURRENT (mA)45
OUTPUT CURRENT vs.
DRIVER OUTPUT LOW VOLTAGE
MAX3080-25
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
2μs/div
DRIVER PROPAGATION DELAY
MAX3080/MAX3081/MAX3082, AND MAX3089
WITH SRL = OPEN
VY - VZ
5V/div
2.5V/div
MAX3080/3089 TYP-20
500ns/div
DRIVER PROPAGATION DELAY
MAX3083/MAX3084/MAX3085, AND MAX3089
WITH SRL = VCC
VY - VZ
5V/div
2.5V/div
MAX3080/3089 TYP-21
50ns/div
DRIVER PROPAGATION DELAY
MAX3086/MAX3087/MAX3088, AND MAX3089
WITH SRL = GND
VY - VZ
5V/div
2.5V/div
MAX3080/3089 TYP-22
Typical Operating Characteristics (continued)
(VCC= +5V, TA = +25°C, unless otherwise noted.)
50ns/div
VA - VB
2V/div
5V/div
MAX3080/3089 TYP-18
RECEIVER PROPAGATION DELAY
MAX3086–MAX3088, AND MAX3089
WITH SRL = GND
50ns/div
VA - VB
2V/div
5V/div
MAX3080/3089 TYP-17
RECEIVER PROPAGATION DELAY
MAX3080–MAX3085, AND MAX3089
WITH SRL = OPEN OR VCC
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
Pin Description
PIN95—Noninverting Driver OutputY9
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.5
Slew-Rate-Limit Selector Pin. Connect SRL to GND for 10Mbps
communication rate; connect to VCCfor 500kbps communication
rate. Leave unconnected for 115kbps communication rate.
SRL—
GroundGND6, 78——TXP—4—3
Driver Output Enable. Drive DE high to enable driver outputs. These
outputs are high impedance when DE is low. Drive REhigh and DE
low to enter low-power shutdown mode.4
HALF-
DUPLEX
MODE
MAX3089
FULL-
DUPLEX
MODE
FULL-DUPLEX
DEVICES
MAX3081
MAX3084
MAX3087
HALF-
DUPLEX
DEVICES
MAX3082
MAX3085
MAX3088
Receiver Output. When REis low and if A - B ≥-50mV, RO will be
high; if A - B ≤-200mV, RO will be low.RO2
Receiver Output Enable. Drive RElow to enable RO; RO is high
impedance when REis high. Drive REhigh and DE low to enter
low-power shutdown mode.3
FUNCTIONNAME
Half/Full-Duplex Selector Pin. Connect H/Fto VCCfor half-duplex
mode; connect to GND or leave unconnected for full-duplex mode.H/F—
MAX3080
MAX3083
MAX3086
Transmitter Phase. Connect TXP to GND, or leave floating for normal
transmitter phase/polarity. Connect to VCCto invert the transmitter
phase/polarity.———9YNoninverting Receiver Input and Noninverting Driver Output*6—10—ZInverting Driver Output———10ZInverting Receiver Input and Inverting Driver Output*7—11—BInverting Receiver Input———11BReceiver Input Resistors*—7——BInverting Receiver Input and Inverting Driver Output
PIN
MAX3080–MAX3089
Fail-Safe, High-Speed (10Mbps),
Slew-Rate-Limited RS-485/RS-422 Transceivers
Pin Description (continued)8—12—ANoninverting Receiver Input———12A
HALF-
DUPLEX
MODE
MAX3089
FULL-
DUPLEX
MODE
FULL-DUPLEX
DEVICES
MAX3081
MAX3084
MAX3087
HALF-
DUPLEX
DEVICES
MAX3082
MAX3085
MAX3088FUNCTIONNAME
MAX3080
MAX3083
MAX3086
Receiver Input Resistors*—6——ANoninverting Receiver Input and Noninverting Driver Output——1313RXP
Receiver Phase. Connect RXP to GND, or leave unconnected for
normal transmitter phase/polarity. Connect to VCCto invert the
receiver phase/polarity.181414VCCPositive Supply; 4.75V ≤VCC≤5.25V
1, 8, 13————N.C.Not Connected. Not internally connected.
Function Tables
TRANSMITTING
INPUTSOUTPUTSDEDIZY110110100XHigh-ZHigh-Z0XShutdown
RECEIVING
INPUTSOUTPUTDEA-BROX≥-0.05V1X≤-0.2V0XOpen/shorted11XHigh-Z0XShutdown
TRANSMITTING
INPUTOUTPUTSZY0110
RECEIVING
INPUTSOUTPUT
A-BRO-0.05V1-0.2V0
Open/shorted1
PIN
X = Don’t care
Shutdown mode, driver and receiver outputs high impedance
*(MAX3089 only.) In half-duplex mode, the driver outputs serve as receiver inputs. The full-duplex receiver inputs (A and B) will still
have a 1/8-unit load, but are not connected to the receiver.
MAX3081/MAX3084/MAX3087MAX3080/MAX3083/MAX3086
MAX3080–MAX3089
ic,good price

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