MAX14840EASA+T ,40Mbps, +3.3V, RS-485 Half-Duplex TransceiversApplications• Hot Swap Capability Eliminates False Transition ● Motion ControllersDuring Power-Up o ..
MAX14840EATA+T ,40Mbps, +3.3V, RS-485 Half-Duplex TransceiversElectrical Characteristics(V = +3.0V to +3.6V, T = -40NC to +125NC, unless otherwise noted. Typical ..
MAX1484CUB ,Software-Selectable / Half-/Full-Duplex / Slew-Rate-Limited / 12Mbps / RS-485/RS-422 Transceivers in MAX PackageELECTRICAL CHARACTERISTICS(V = +5V ±5%, T = T to T , unless otherwise noted. Typical values are at ..
MAX1484EUB ,Software-Selectable / Half-/Full-Duplex / Slew-Rate-Limited / 12Mbps / RS-485/RS-422 Transceivers in MAX PackageMAX1481/MAX1484/MAX1485/MAX148619-1312; Rev 0; 10/97Software-Selectable, Half-/Full-Duplex, Slew-Ra ..
MAX1484EUB+ ,Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,12Mbps, RS-485/RS-422 Transceivers in µMAX PackageELECTRICAL CHARACTERISTICS(V = +5V ±5%, T = T to T , unless otherwise noted. Typical values are at ..
MAX1484EUB+T ,Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,12Mbps, RS-485/RS-422 Transceivers in µMAX PackageMAX1481/MAX1484/MAX1485/MAX148619-1312; Rev 1; 3/06Softw are-Selectable, Half-/Full-Duplex, Slew -R ..
MAX4074BNESA ,Micropower, Rail-to-Rail, fixed-gain, single, GainAmp op amp. Inverting gain 99V/V, noninverting gain 100V/V, -3dB BW 40kHZ.ELECTRICAL CHARACTERISTICS—MAX4074/MAX4075(V = +2.5V to +5.5V, V = 0, V = V = V /2, R = ∞ to V /2, ..
MAX4075ADESA ,Micropower, Rail-to-Rail, fixed-gain, dual, GainAmp op amp. Inverting gain 1V/V, noninverting gain 2V/V, -3dB BW 102kHz.ELECTRICAL CHARACTERISTICS—MAX4074/MAX4075(V = +2.5V to +5.5V, V = 0, V = V = V /2, R = ∞ to V /2, ..
MAX4075AGESA ,Micropower, Rail-to-Rail, fixed-gain, dual, GainAmp op amp. Inverting gain 2V/V, noninverting gain 3V/V, -3dB BW 135kHz.ELECTRICAL CHARACTERISTICS—MAX4074/MAX4075 (continued)(V = +2.5V to +5.5V, V = 0, V = V = V /2, R = ..
MAX4075BAESA ,Micropower, Rail-to-Rail, fixed-gain, dual, GainAmp op amp. Inverting gain 10V/V, noninverting gain 11V/V, -3dB BW 79kHz.ELECTRICAL CHARACTERISTICS—MAX4074/MAX4075 (continued)(V = +2.5V to +5.5V, V = 0, V = V = V /2, R = ..
MAX4075BJESA ,Micropower, Rail-to-Rail, fixed-gain, dual, GainAmp op amp. Inverting gain 49V/V, noninverting gain 50V/V, -3dB BW 50kHz.Applications Ordering Information continued at end of data sheet.Note: Insert the desired gain code ..
MAX4076ESA ,Micropower / SOT23 / Rail-to-Rail / Fixed-Gain / GainAmp/Open-Loop Op AmpsELECTRICAL CHARACTERISTICS—MAX4074/MAX4075 (continued)(V = +2.5V to +5.5V, V = 0, V = V = V /2, R = ..
MAX14840EASA+T-MAX14840EATA+T
40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
General DescriptionThe MAX14840E/MAX14841E are +3.3V ESD-protected
transceivers intended for half-duplex RS-485 communica-
tion up to 40Mbps. These transceivers are optimized for
high speeds over extended cable runs while maximizing
tolerance to noise.
The MAX14840E features symmetrical fail-safe and larg-
er receiver hysteresis, providing improved noise rejection
and improved recovered signals in high-speed and long
cable applications. The MAX14841E has true fail-safe
receiver inputs guaranteeing a logic-high receiver output
when inputs are shorted or open.
The MAX14840E/MAX14841E are available in 8-pin SO
and small, 8-pin (3mm x 3mm) TDFN-EP packages. Both
devices operate over the -40NC to +125NC temperature
range.
Applications●Motion Controllers●Fieldbus Networks●Industrial Control Systems●Backplane Buses●HVAC Networks
Beneits and Features●High ESD Protection Provides Increases Equipment
Uptime±35kV Human Body Model (HBM) per JEDEC
JS-001-2012±20kV Air Gap Discharge per IEC 61000-4-2±12kV Contact Discharge per IEC 61000-4-2●Integrated Features Increases Robustness Large 170mV Receiver Hysteresis (MAX14840) for
High Receiver Noise Tolerance True Fail Safe Receiver Input (MAX14841E) Keeps
Receiver Output Logic-High Upon Shorts and
Open On Receiver InputThermal Self-Protection Shutdown at 160°C
Junction TemperatureHigh Industrial -40°C to +125°C Ambient Operating
Temperature Range/-40°C to +150°C Junction
Temperature RangeHot Swap Capability Eliminates False Transition
During Power-Up or Hot Insertion●Low Current Reduces Power Requirements10µA (max) Shutdown Current1.5mA (typ) Supply Current3.3V Supply Voltage●Available in Industry Standard 8-Pin SO or
Space-Saving 8-Pin TDFN-EP (3mm x 3mm) Packages
Functional DiagramGND
VCC
SHUTDOWN
MAX14840E
MAX14841E
Ordering Information/Selector Guide appears at end of data
sheet.
MAX14840E/MAX14841E40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-
tion 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.
(Voltages referenced to GND.)
VCC ..................................................................... -0.3V to +6.0V
RE, RO .................................................. -0.3V to +(VCC + 0.3V)
DE, DI .................................................................. -0.3V to +6.0V
A, B .................................................................... -8.0V to +13.0V
Short-Circuit Duration (RO, A, B) to GND ............... Continuous
Continuous Power Dissipation (TA = +70NC)
8-Pin SO (derate 7.6mW/NC above +70NC) ............... 606mW
8-Pin TDFN (derate 24.4mW/NC above +70NC) ....... 1951mW
Junction-to-Case Thermal Resistance (BJC) (Note 1)
8-Pin SO .......................................................................38NC/W
8-Pin TDFN ....................................................................8NC/W
Junction-to-Ambient Thermal Resistance (BJA) (Note 1)
8-Pin SO ....................................................................132NC/W
8-Pin TDFN ..................................................................41NC/W
Operating Temperature Range (Note 2) ........ -40NC to +125NC
Junction Temperature .................................................. +150NC
Storage Temperature Range ......................... -65NC to +150NC
Lead Temperature (soldering, 10s) ...............................+300NC
Soldering Temperature (reflow) ......................................+260NC
DC Electrical Characteristics(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Notes 3, 4)
Absolute Maximum RatingsNote 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 www.maximintegrated.com/thermal-tutorial.
Note 2: Operation is specified with junction temperatures up to +150°C.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER SUPPLY
Supply VoltageVCC3.03.6V
Supply CurrentICC
DE = RE = VCC, or
DE = RE = GND, or
DE = VCC, RE = GND,
DI = VCC or GND, no load
1.54mA
Shutdown Supply CurrentISHDE = GND and RE = VCC10FA
DRIVER
Differential Driver OutputVODRL = 54I, Figure 11.5V
Change in Magnitude of
Differential Output VoltageDVODRL = 54I, Figure 1 (Note 5)-0.20+0.2V
Driver Common-Mode Output
VoltageVOCRL = 54I, Figure 1VCC/23V
Change in Common-Mode
VoltageDV OCRL = 54I, Figure 1 (Note 5)-0.20.2V
Single-Ended Driver Output HighVOHA/B output, IOUT = -20mA2.2V
Single-Ended Driver Output LowVOLA/B output, IOUT = 20mA0.8V
Driver Short-Circuit Output
Current|IOSD|0V P VOUT P +12V, output low250mA-7V P VOUT P VCC, output high250
RECEIVER
Input Current (A and B)IA,BDE = GND,
VCC = GND or +3.6V
VIN = +12V1000FAVIN = -7V-800
Differential Input CapacitanceCA,BBetween A and B, DE = GND, f = 2MHz12pF
MAX14840E/MAX14841E40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
DC Electrical Characteristics (continued)(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Notes 3, 4)
Switching Characteristics(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Notes 2, 3)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Receiver Differential Threshold
Voltage (MAX14840E Only)
VTHF-7V P VCM P 12V, VOD falling-200-10mV
VTHR-7V P VCM P 12V, VOD rising10200mV
Receiver Input Hysteresis
(MAX14840E Only)VCM = 0V20170mV
Receiver Differential Threshold
Voltage (MAX14841E Only)VTH-7V P VCM P 12V-200-105-10mV
Receiver Input Hysteresis
(MAX14841E Only)DVTHVCM = 0V10mV
LOGIC INTERFACE
Input High VoltageVIHDE, DI2.05.5VRE2.0
Input Low VoltageVILDE, DI, RE0.8V
Input HysteresisVHYSDE, DI, RE50mV
Input CurrentIINDE, DI, RE-1+1FA
Input Impedance on First
TransitionDE, RE110kI
Output High VoltageVOHRE = GND, IO = -1mA, VA - VB > 200mVVCC -
1.5V
Output Low VoltageVOLRE = GND, IO = 1mA, VA - VB < -200mV0.4V
Three-State Output Current at
ReceiverIOZRRE = VCC, 0V P VO P VCC-1+1FA
Receiver Output Short-Circuit
CurrentIOSR0V P VRO P VCC-95+95mA
PROTECTION
Thermal-Shutdown ThresholdTTS160NC
Thermal-Shutdown HysteresisTTSH15NC
ESD Protection: A, B to GND
IEC 61000-4-2 Air Gap DischargeQ20IEC 61000-4-2 Contact DischargeQ12
HBMQ35
ESD Protection: All Other PinsHBMQ2kV
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DRIVER
Propagation DelaytDPLHRL = 54I, CL = 50pF, Figures 2 and 3
(Note 6)1220nstDPHL51220
Differential Driver Output Skew
|tDPLH - tDPHL|tDSKEWRL = 54I, CL = 50pF, Figures 2 and 3
(Notes 6, 9)2ns
MAX14840E/MAX14841E40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
Switching Characteristics (continued)(VCC = +3.0V to +3.6V, TA = -40NC to +125NC, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25NC.) (Notes 3, 4)
Note 3: All devices are 100% production tested at TA = +25NC. Specifications for all temperature limits are guaranteed by design.
Note 4: 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 5: DV OD and DVOC are the changes in VOD and VOC, respectively, when the DI input changes state.
Note 6: Capacitive load includes test probe and fixture capacitance.
Note 7: The timing parameter refers to the driver or receiver enable delay when the device has exited the initial hot-swap protect
state and is in normal operating mode.
Note 8: Shutdown is enabled by driving RE high and DE low. The device is guaranteed to have entered shutdown after tSHDN has
elapsed.
Note 9: Parameter is guaranteed by characterization and not production tested.
Driver Differential Output Rise or
Fall TimetHL, tLHRL = 54I, CL = 50pF, Figures 2 and 3
(Notes 6, 9)7.5ns
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Maximum Data RateDRMAX40Mbps
Driver Enable to Output HightDZHRL = 110I, CL = 50pF, Figures 4 and 5
(Notes 6, 7)30ns
Driver Enable to Output LowtDZLRL = 110I, CL = 50pF, Figures 4 and 5
(Notes 6, 7)30ns
Driver Disable Time from LowtDLZRL = 110I, CL = 50pF, Figures 4 and 5
(Notes 6, 7)30ns
Driver Disable Time from HightDHZRL = 110I, CL = 50pF, Figures 4 and 5
(Notes 5, 6)30ns
Driver Enable from Shutdown to
Output LowtDZL(SHDN)RL = 110I, CL = 50pF, Figures 4 and 5
(Notes 6, 7)4Fs
Driver Enable from Shutdown to
Output HightDZH(SHDN)RL = 110I, CL = 50pF, Figures 4 and 5
(Notes 6, 7)4Fs
Time to ShutdowntSHDN(Note 8)50800ns
RECEIVER
Propagation DelaytRPLHCL = 15pF, Figures 6 and 7 (Note 6)25nstRPHL25
Receiver Output Skew tRSKEWCL = 15pF, Figures 6 and 7 (Notes 6, 9)2ns
Maximum Data RateDRMAX40Mbps
Receiver Enable to Output HightRZHRL = 1kI, CL = 15pF, Figure 8 (Notes 6, 7)20ns
Receiver Enable to Output LowtRZLRL = 1kI, CL = 15pF, Figure 8 (Notes 6, 7)20ns
Receiver Disable Time from LowtRLZRL = 1kI, CL = 15pF, Figure 8 (Notes 6, 7)20ns
Receiver Disable Time from HightRHZRL = 1kI, CL = 15pF, Figure 8 (Notes 6, 7)20ns
Receiver Enable from Shutdown
to Output LowtRZL(SHDN)RL = 1kI, CL = 15pF, Figure 8 (Notes 6, 7)4Fs
Receiver Enable from Shutdown
to Output HightRZH(SHDN)RL = 1kI, CL = 15pF, Figure 8 (Notes 6, 7)4Fs
Time to ShutdowntSHDN(Note 8)50800ns
MAX14840E/MAX14841E40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
Test and Timing DiagramsFigure 1. Driver DC Test LoadFigure 2. Driver Timing Test Circuit
Figure 3. Driver Propagation Delays
VOD
VOCCLVOD
VCC
1.5V1.5V
tDPHLtDPLH
VOD
10%
90%
10%
90%
-VO
VOD
tDSKEW = tDPLH - tDPHL
VOD = [VA - VB]
VCC
f = 1MHz, tLH = 3ns, tHL = 3ns
tLHtHL
0.25V
1.5V
tDZH, tDZH(SHDN)
tDHZ
VCC
VOH
1.5V
OUT
RL = 110I
50I
OUTADIGND OR VCC
GENERATOR
50pF
MAX14840E/MAX14841E40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
Test and Timing Diagrams (continued)Figure 5. Driver Enable and Disable Times (tDLZ, tDZL )
Figure 6. Receiver Propagation Delay Test Circuit
Figure 7. Receiver Propagation Delays
RL = 110I
50I
OUT
0.25V
1.5V
tDZL, tDZL(SHDN)
tDLZADI0 OR VCC
VCC
VCC
1.5V
VCC
OUT
VOL
GENERATOR
VID
RECEIVER
OUTPUTATER
VOH
VOL
tRPHL
tRSKEW = tRPHL - tRPLH
f = 1MHz, tLH P 3ns, tHL P 3ns
tRPLH
-1V
VCC
VCC
MAX14840E/MAX14841E40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
Test and Timing Diagrams (continued)Figure 8. Receiver Enable and Disable Times
GENERATOR50I
1kI
15pF
-1.5V
+1.5VVCC
VID
tRHZtRLZ
0.25V
0.25V
1.5V1.5V0
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 OPEN
S2 CLOSED
S3 = +1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
VOH
VOH
VCC
VCCVCC
1.5V1.5V
VCC
tRZL, tRZL(SHDN)
VOL
VCCVCC
VCC
VOL
tRZH, tRZH(SHDN)
VCC
MAX14840E/MAX14841E40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
Typical Operating Characteristics(VCC = +3.3V, TA = +25NC, unless otherwise noted.)
DRIVER OUTPUT CURRENT
vs. OUTPUT LOW VOLTAGE
MAX14840E toc09
OUTPUT CURRENT (mA)8642
DRIVER OUTPUT CURRENT
vs. OUTPUT HIGH VOLTAGE
MAX14840E toc08
OUTPUT CURRENT (mA)1-1-3-5
DIFFERENTIAL DRIVER OUTPUT VOLTAGE
vs. TEMPERATURE
MAX14840E toc07
DIFFERENTIAL DRIVER OUTPUT VOLTAGE (V)
RL = 54I
DIFFERENTIAL DRIVER OUTPUT
VOLTAGE vs. OUTPUT CURRENT
MAX14840E toc06
IOD (mA)
(V)4020
RECEIVER OUTPUT LOW VOLTAGE
vs. OUTPUT CURRENT
MAX14840E toc05
IRO (mA)
(V)21181512963
RECEIVER OUTPUT HIGH VOLTAGE
vs. OUTPUT CURRENT
IRO (mA)
(V)15105
MAX14840E toc04
SUPPLY CURRENT vs. DATA RATE
MAX14840E toc03
DATA RATE (Mbps)
SUPPLY CURRENT (2010
54I LOAD
NO LOAD
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX14840E toc02
TEMPERATURE (°C)
SUPPLY CURRENT (
RE = VCC
DE = GND
NO-LOAD SUPPLY CURRENT
vs. TEMPERATURE
MAX14840E toc01
TEMPERATURE (°C)
SUPPLY CURRENT (
RE = GND AND DE = VCC,
OR RE = VCC AND DE = VCC
MAX14840E/MAX14841E40Mbps, +3.3V, RS-485 Half-Duplex Transceivers
