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MAX3880ECB ,+3.3V, 2.488Gbps, SDH/SONET 1:16 deserializer with clock recovery.Applications2.488Gbps SDH/SONET Transmission SystemsPin Configuration appears at end of data sheet. ..
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MAX13085E-MAX13085ECPA-MAX13085EEPA+-MAX13085EESA+-MAX13085EESA+T
+5.0V, ±15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
19-6016; Rev 0; 10/11
General Description
The MAX13085E +5.0V, ±15kV ESD-protected, RS-485/
RS-422 transceiver features one driver and one receiver.
The device includes 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 MAX13085E includes a hot-swap
capability to eliminate false transitions on the bus during
power-up or hot insertion.
The MAX13085E features reduced slew-rate drivers
that minimize EMI and reduce reflections caused by
improperly terminated cables, allowing error-free data
transmission up to 500kbps.
The MAX13085E is ideal for half-duplex communications
and it draws 1.2mA of supply current when unloaded
or when fully loaded with the drivers disabled. The
MAX13085E has a 1/8-unit load receiver input imped-
ance, allowing up to 256 transceivers on the bus.
The MAX13085E is available in an 8-pin SO and PDIP
packages.
Applications
Utility Meters
Lighting Systems
Industrial Control
Telecom
Security Systems
Instrumentation
Profibus
Features
S +5.0V Operation
S Extended ESD Protection for RS-485/RS-422 I/O
Pins ±15kV Human Body Model
S True Fail-Safe Receiver While Maintaining
EIA/TIA-485 Compatibility
S Hot-Swap Input Structures on DE and RE
S Enhanced Slew-Rate Limiting Facilitates Error-
Free Data Transmission
S Low-Current Shutdown Mode
S Allow Up to 256 Transceivers on the Bus
S Available in Industry-Standard 8-Pin SO and PDIP
Packages
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package. Typical Operating CircuitRt
0.1µF
TYPICAL HALF-DUPLEX OPERATING CIRCUIT
VCC
GND
MAX13085E
PARTTEMP RANGEPIN-PACKAGE
MAX13085EESA+-40NC to +85NC8 SO
MAX13085E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
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) ...............................-0.3V to +6V
Driver Input Voltage (DI) .........................................-0.3V to +6V
Driver Output Voltage (A, B) ....................................-8V to +13V
Receiver Input Voltage (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)
SO (derate 5.9mW/°C above +70°C) ..........................471mW
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
Soldering Temperature (reflow) ......................................+260°C
DC ELECTRICAL CHARACTERISTICS
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25NC.) (Note 1)
ABSOLUTE MAXIMUM RATINGS
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DRIVER
VCC Supply-Voltage RangeVCC4.55.5V
Differential Driver Output VOD
RL = 100I (RS-422), Figure 13VCCRL = 54I (RS-485), Figure 12VCC
No loadVCC
Change in Magnitude of
Differential Output Voltage DVODRL = 100I or 54I, Figure 1 (Note 2)0.2V
Driver Common-Mode Output
Voltage VOCRL = 100I or 54I, Figure 1VCC/23V
Change in Magnitude of
Common-Mode Voltage DVOCRL = 100I or 54I, Figure 1 (Note 2)0.2V
Input-High VoltageVIHDE, DI, RE3V
Input-Low VoltageVILDE, DI, RE0.8V
Input HysteresisVHYSDE, DI, RE100mV
Input CurrentIIN1DE, DI, REQ1FA
Input Impedance First Transition
at Power-UpRPWUPVDE, VRE = VRE = 2V3.658.8kI
Input Impedance on First
Transition after POR Delay RftVDE = VRE = 2V760kΩ
Driver Short-Circuit Output
Current IOSD0 P VOUT P +12V (Note 3)40250mA-7V P VOUT P VCC (Note 3)-250-40
Driver Short-Circuit Foldback
Output CurrentIOSDF(VCC - 1V) P VOUT P +12V (Note 3)20mA-7V P VOUT P +1V (Note 3)-20
Thermal-Shutdown ThresholdTTS175NC
Thermal-Shutdown HysteresisTTSH15NC
Input Current (A and B)IA, BVDE = 0V,
VCC = 0V or VCC
VIN = +12V125FAVIN = -7V-100
RECEIVER
Receiver Differential Threshold
VoltageVTH-7V P VCM P +12V-200-125-50mV
MAX13085E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25NC.) (Note 1)
DRIVER SWITCHING CHARACTERISTICS WITH INTERNAL SRL (500kbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25NC.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
RO Output-High VoltageVOHIO = -1mAVCC -
0.6V
RO Output-Low VoltageVOLIO = 1mA0.4V
Three-State Output Current at
ReceiverIOZR0 P VO P VCC P 1FA
Receiver Input ResistanceRIN-7V P VCM P +12V96kI
Receiver Output Short-Circuit
CurrentIOSR0V P VRO P VCCP 110mA
SUPPLY CURRENT
Supply CurrentICC
No load, VRE = 0V, DE = VCC1.21.8No load, RE = VCC, DE = VCC1.21.8
No load, VRE = 0V, VDE = 0V1.21.8
Supply Current in Shutdown
ModeISHDNRE = VCC, VDE = 0V2.810FA
ESD PROTECTION
ESD Protection for A and B
Human Body ModelQ15
Contact Discharge
IEC 61000-4-2, level 4Q8
Air-Gap Discharge
IEC 61000-4-2Q15
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Driver Propagation DelaytDPLHCL = 50pF, RL = 54I, Figures 2 and 32001000nstDPHL2001000
Driver Differential Output Rise or
Fall TimetR , tFCL = 50pF, RL = 54I, Figures 2 and 3250900ns
Differential Driver Output Skew
|tDPLH - tDPHL|tDSKEWCL = 50pF, RL = 54I, Figures 2 and 3 140ns
Maximum Data Rate500kbps
Driver Enable to Output HightDZHFigure 42500ns
Driver Enable to Output LowtDZLFigure 52500ns
Driver Disable Time from LowtDLZFigure 5100ns
Driver Disable Time from HightDHZFigure 4100ns
Driver Enable from Shutdown to
Output HightDZH(SHDN)Figure 45500ns
Driver Enable from Shutdown to
Output LowtDZL(SHDN)Figure 55500ns
Time to ShutdowntSHDN50340700ns
MAX13085E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
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.
RECEIVER SWITCHING CHARACTERISTICS WITH INTERNAL SRL (500kbps)
(VCC = +5.0V ±10%, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5.0V and TA = +25NC.) (Note 1) Test Circuits and Waveforms
Figure 1. Driver DC Test Load
Figure 3. Driver Propagation Delays
VOD
VOC
RL/2
RL/2
VCC
VODRLCL
VCC
-VO
VCC/2
tDPLHtDPHL
1/2 VO
10%
90%90%
1/2 VO
10%
VDIFF = V (B) - V (A)
VDIFF
tSKEW = | tDPLH - tDPHL |
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Receiver Propagation DelaytRPLHCL = 15pF, Figures 6 and 7200nstRPHL200
Receiver Output Skew
|tRPLH - tRPHL|tRSKEWCL = 15pF, Figures 6 and 7 30ns
Maximum Data Rate500kbps
Receiver Enable to Output LowtRZLFigure 850ns
Receiver Enable to Output HightRZHFigure 850ns
Receiver Disable Time from LowtRLZFigure 850ns
Receiver Disable Time from HightRHZFigure 850ns
Receiver Enable from Shutdown
to Output HightRZH(SHDN)Figure 85500ns
Receiver Enable from Shutdown
to Output LowtRZL(SHDN)Figure 85500ns
Time to ShutdowntSHDN50340700ns
MAX13085E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
Test Circuits and Waveforms (continued)
Figure 4. Driver Enable and Disable Times (tDHZ, tDZH, tDZH(SHDN))
Figure 5. Driver Enable and Disable Times (tDZL, tDLZ, tDLZ(SHDN))
OUT
tDHZ
VCC
VCC/2
0.25V
VOH
GENERATOR
0 OR VCC
50ΩOUT
tDZH, tDZH(SHDN)
VOM = (0 + VOH)/2
RL = 500ΩCL
50pF
VCC
OUT
tDLZ
VCC
VCC/2
GENERATOR
0 OR VCC
50ΩOUT
tDZL, tDZL(SHDN)
VOM = (VOL + VCC)/2
RL = 500Ω
50pF
VOL0.25V
VCC
MAX13085E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
Test Circuits and Waveforms (continued)
Figure 6. Receiver Propagation Delay Test CircuitFigure 7. Receiver Propagation Delays
VIDR
RECEIVER
OUTPUTATE
VOH
VCC/2
tRPLH
tRPHL
VOL
+1V
-1V
THE RISE TIME AND FALL TIME OF INPUTS A AND B < 4ns
S1 OPEN
S2 CLOSED
VS3 = +1.5V
VCC
VOH
VOH / 2
S1 OPEN
S2 CLOSED
VS3 = +1.5V
tRHZ
VCC
VOH
0.25V
VCC/250%50%
10%
10%
S1 CLOSED
S2 OPEN
VS3 = -1.5V
VCC
VOL
VCC
VCC/2
S1 CLOSED
S2 OPEN
VS3 = -1.5V
tRLZ
VCC
VOL
VCC
0.25V
GENERATOR
VCC
+1.5V
1kΩ
15pFS2
50Ω
-1.5VVID
tRZH, tRZH(SHDN)tRZL, tRZL(SHDN)
(VOL + VCC)/2
VCC/2
MAX13085E
+5.0V, ±15kV ESD-Protected, Fail-Safe,
Hot-Swap, RS-485/RS-422 Transceiver
Typical Operating Characteristics
(VCC = +5.0V, TA = +25°C, unless otherwise noted.)
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-LOW VOLTAGE
MAX13085E toc09
OUTPUT CURRENT (mA)
OUTPUT CURRENT vs. TRANSMITTER
OUTPUT-HIGH VOLTAGE
MAX13085E toc08
OUTPUT CURRENT (mA)
DRIVER DIFFERENTIAL OUTPUT
VOLTAGE vs. TEMPERATURE
MAX13085E toc07
DIFFERENTIAL OUTPUT VOLTAGE (V)
RL = 54Ω
DRIVER DIFFERENTIAL OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
MAX13085E toc06
DIFFERENTIAL OUTPUT VOLTAGE (V)
DIFFERENTIAL OUTPUT CURRENT (mA)
RECEIVER OUTPUT-LOW VOLTAGE
vs. TEMPERATURE
MAX13085E toc05
TEMPERATURE (°C)
OUTPUT LOW VOLTAGE (V)
IO = 1mA
RECEIVER OUTPUT-HIGH VOLTAGE
vs. TEMPERATURE
MAX13085E toc04
TEMPERATURE (°C)
OUTPUT HIGH VOLTAGE (V)
IO = -1mA
OUTPUT CURRENT
vs. RECEIVER OUTPUT-LOW VOLTAGE
MAX13085E toc03
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)1345
OUTPUT CURRENT
vs. RECEIVER OUTPUT-HIGH VOLTAGEMAX13085E toc02
OUTPUT HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
SUPPLY CURRENT vs. TEMPERATURE
MAX13085E toc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
NO LOAD
DE = VCC
DE = 0
