MAX13487EESA+T-MAX13488EESA+T Fast Delivery |IC PHOENIX CO.,LIMITED

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MAX13487EESA+T-MAX13488EESA+T
Half-Duplex RS-485/RS-422-Compatible Transceiver with AutoDirection Control
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
EVALUATION KIT AVAILABLE
General Description
The MAX13487E/MAX13488E +5V, half-duplex, ±15kV
ESD-protected RS-485/RS-422-compatible transceivers
feature one driver and one receiver. The MAX13487E/
MAX13488E include a hot-swap capability to eliminate
false transitions on the bus during power-up or live
insertion.
The MAX13487E/MAX13488E feature Maxim’s propri-
etary AutoDirection control. This architecture makes the
devices ideal for applications, such as isolated RS-485
ports, where the driver input is used in conjunction with
the driver-enable signal to drive the differential bus.
The MAX13487E features reduced slew-rate drivers
that minimize EMI and reduce reflections caused by
improperly terminated cables, allowing error-free trans-
mission up to 500kbps. The MAX13488E driver slew
rate is not limited, allowing transmit speeds up to
16Mbps.
The MAX13487E/MAX13488E feature a 1/4-unit load
receiver input impedance, allowing up to 128 trans-
ceivers on the bus. These devices are intended for half-
duplex communications. All driver outputs are
protected to ±15kV ESD using the Human Body Model.
The MAX13487E/MAX13488E are available in an 8-pin
SO package. The devices operate over the extended
-40°C to +85°C temperature range.
Applications
Isolated RS-485 Interfaces
Utility Meters
Industrial Controls
Industrial Motor Drives
Automated HVAC Systems
Benefits and FeaturesAutoDirection Saves Space and BOM CostAutoDirection Enables Driver Automatically on
Transmission, Eliminating an Opto or Other
Discrete Means of Isolation8-Pin SO PackageRobust Protection Features for Telecom, Industrial,
and Isolated ApplicationsHot-Swap Capability to Eliminate False Transitions
on the Bus During Power-Up or Live InsertionExtended ESD Protection for RS-485 I/O Pins
(±15kV Human Body Model)Options Optimize Designs for Speed or Errorless
Data TransmissionEnhanced Slew-Rate Limiting Facilitates Error-
Free Data Transmission (MAX13487E)High-Speed Version (MAX13488E) Allows for
Transmission Speeds Up to 16Mbps1/4-Unit Load, Allowing Up to 128 Transceivers on
the Bus
Ordering Information/
Selector Guide
PARTPIN-PACKAGESLEW-RATE
LIMITED
MAX13487EESA+8 SOYes
MAX13488EESA+8 SONo
+Denotes a lead(Pb)-free/RoHS-compliant package.
Note:All devices operate over the -40°C to +85°C temperature
range.
Pin Configuration/Typical Application Circuit appear at end
of data sheet.
VCC8
STATE
MACHINE
COM
GND
SHDN
VDT
MAX13487E
MAX13488E
Functional Diagram
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
Absolute Maximum Ratings
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
SHDN, RE, DI..............................................................-0.3V to +6
A, B...........................................................................-8V to +13V
Short-Circuit Duration (RO, A, B) to GND..................Continuous
Continuous Power Dissipation (TA= +70°C)
8-Pin 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
Electrical Characteristics
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DRIVER
RDIFF = 100Ω, Figure 12.0VCC
RDIFF = 54Ω, Figure 11.5Differential Driver OutputVOD
No loadVCC
Driver Common-Mode Output
VoltageVOCRL = 100Ω or 54Ω, Figure 1VCC / 23V
Driver Disable ThresholdVDTFigure 2 (Note 2)+0.6+1V
Input-High VoltageVIHDI, SHDN, RE2.0V
Input-Low VoltageVILDI, SHDN, RE0.8V
Input CurrentIINDI, SHDN, RE±1µA
0V ≤ VOUT ≤ +12V+50+250Driver Short-Circuit Output
Current
(Note 3)
IOSD
-7V ≤ VOUT ≤ 0V-250-50
(VCC - 1V) ≤ VOUT ≤ +12V20mADriver Short-Circuit Foldback
Output Current (Note 3)IOSDF-7V ≤ VOUT ≤ 0V-20
RECEIVER
VIN = +12V250Input Current
(A and B)IA, BDI = VCC, VCC
= GND or +5VVIN = -7V-200µA
Receiver Differential Threshold
VoltageVTH-7V ≤ VCM ≤ +12V-200+200mV
Receiver Input HysteresisΔVTHVA + VB = 0V25mV
Output-High VoltageVOHIO = -1.6mA, VA - VB > VTHVCC -
1.5V
Output-Low VoltageVOLIO = 1mA, VA - VB < -VTH0.4V
Tri-State Output Current at
ReceiverIOZR0V ≤ VO ≤ VCC±1µA
Receiver Input ResistanceRIN-7V ≤ VCM ≤ +12V48kΩ
Receiver Output Short-Circuit
CurrentIOSR0V ≤ VRO ≤ VCC±7±95mA
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
Electrical Characteristics (continued)
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
POWER SUPPLY
Supply VoltageVCC4.755.25V
Supply CurrentICCSHDN = 1, RE = 0, no load4.5mA
Shutdown Supply CurrentISHDNSHDN = 010µA
ESD PROTECTION
Air Gap Discharge IEC 61000-4-2
(MAX13487E)±15ESD Protection (A, B)
Human Body Model±15
ESD Protection (All Other Pins)Human Body Model±2kV
Switching Characteristics—MAX13487E
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DRIVER
tDPLH2001000Driver Propagation DelaytDPHLRL = 110Ω, CL = 50pF, Figures 2 and 32001000ns
tHL200900Driver Differential Output Rise or
Fall TimetLHRL = 110Ω, CL = 50pF, Figures 2 and 3200900ns
Maximum Data Rate500kbps
Driver Disable DelaytDDDFigure 32500ns
Driver Enable from Shutdown to
Output HightDZH(SHDN)Figure 45.5µs
Driver Enable from Shutdown to
Output LowtDZL(SHDN)Figure 45.5µs
Time to ShutdowntSHDN50340700ns
RECEIVER
tRPLH80Receiver Propagation DelaytRPHLCL = 15pF, Figures 5 and 680ns
Receiver Output SkewtRSKEWCL = 15pF, Figure 613ns
Maximum Data Rate500kbps
Receiver Enable to Output HightRZHFigure 750ns
Receiver Enable to Output LowtRZLFigure 750ns
Receiver Disable Time from HightRHZFigure 750ns
Receiver Disable Time from LowtRLZFigure 750ns
Receiver Enable from Shutdown
to Output High
tRZH
(SHDN)Figure 82200ns
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
Switching Characteristics—MAX13487E (continued)
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Receiver Enable from Shutdown
to Output Low
tRZL
(SHDN)Figure 82200ns
Receiver Enable DelaytREDFigure 370ns
Time to ShutdowntSHDN50340700ns
Switching Characteristics—MAX13488E
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
DRIVER
tDPLH50Driver Propagation DelaytDPHLRL = 110Ω, CL = 50pF, Figures 2 and 350ns
tHL15Driver Differential Output Rise or
Fall TimetLHRL = 110Ω, CL = 50pF, Figures 2 and 315ns
Maximum Data Rate16Mbps
Driver Disable DelaytDDDFigure 370ns
Driver Enable from Shutdown to
Output HightDZH(SHDN)Figure 42.2µs
Driver Enable from Shutdown to
Output LowtDZL(SHDN)Figure 42.2µs
Time to ShutdowntSHDN50340700ns
RECEIVER
tRPLH80Receiver Propagation DelaytRPHLCL = 15pF, Figures 5 and 680ns
Receiver Output SkewtRSKEWCL = 15pF, Figure 613ns
Maximum Data Rate16Mbps
Receiver Enable to Output HightRZHFigure 750ns
Receiver Enable to Output LowtRZLFigure 750ns
Receiver Disable Time from HightRHZFigure 750ns
Receiver Disable Time from LowtRLZFigure 750ns
Receiver Enable from Shutdown
to Output High
tRZH
(SHDN)Figure 82200ns
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
Switching Characteristics—MAX13488E (continued)
(VCC= +5V ±5%, TA= TMINto TMAX, unless otherwise noted. Typical values are at VCC= +5V and TA= +25°C.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Receiver Enable from Shutdown
to Output Low
tRZL
(SHDN)Figure 82200ns
Receiver Enable DelaytREDFigure 370ns
Time to ShutdowntSHDN50340700ns
Note 1:All currents into the device are positive. All currents out of the device are negative. All voltages referred to device ground,
unless otherwise noted.
Note 2:This is a differential voltage from A to B that the driving device must see on the bus to disable its driver.
Note 3:The short-circuit output current applied to peak current just prior to foldback current limiting. The short-circuit foldback out-
put current applies during current limiting to allow a recovery from bus contention.
Typical Operating Characteristics
(VCC= +5.0V, TA= +25°C, unless otherwise noted.)
SUPPLY CURRENT vs. TEMPERATURE
MAX13487Etoc01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)3510-15
NO LOAD
OUTPUT CURRENT
vs. RECEIVER OUTPUT-HIGH VOLTAGE
MAX13487Etoc02
OUTPUT-HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)321
OUTPUT CURRENT
vs. RECEIVER OUTPUT-LOW VOLTAGE
MAX13487Etoc03
OUTPUT-LOW VOLTAGE (V)
OUTPUT CURRENT (mA)321
RECEIVER OUTPUT-HIGH VOLTAGE
vs. TEMPERATURE
MAX13487Etoc04
OUTPUT-HIGH VOLTAGE (V)3510-15
IO = 1mA
RECEIVER OUTPUT-LOW
VOLTAGE vs. TEMPERATURE
MAX13487Etoc05
OUTPUT-LOW VOLTAGE (V)3510-15
IO = 1mA
DIFFERENTIAL OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
MAX13487Etoc06
OUTPUT CURRENT (mA)321
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
DRIVER DIFFERENTIAL OUTPUT VOLTAGE
vs. TEMPERATURE
MAX13487Etoc07
TEMPERATURE (°C)
DIFFERENTIAL OUTPUT VOLTAGE (V)3510-15
RDIFF = 54Ω
OUTPUT CURRENT
vs. TRANSMITTER OUTPUT-HIGH VOLTAGE
MAX13487Etoc08
OUTPUT-HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)-1-3-51402-2-4-6
OUTPUT CURRENT
vs. TRANSMITTER OUTPUT-LOW VOLTAGE
MAX13487Etoc09
OUTPUT-LOW VOLTAGE (V)
OUTPUT CURRENT (mA)8624
SHUTDOWN CURRENT vs. TEMPERATURE
MAX13487Etoc10
TEMPERATURE (°C)
SHUTDOWN CURRENT (3510-15
DRIVER PROPAGATION vs. TEMPERATURE
(MAX13487E)
MAX13487Etoc12
TEMPERATURE (°C)
DRIVER PROPAGATION DELAY (ns)3510-15
tDPLH
tDPHL
RL = 110Ω
DRIVER PROPAGATION vs. TEMPERATURE
(MAX13487E)
MAX13487Etoc11
TEMPERATURE (°C)
DRIVER PROPAGATION DELAY (ns)3510-15
tDPLH
tDPHL
RL = 10kΩ
RECEIVER PROPAGATION vs. TEMPERATURE
(MAX13487E)
MAX13487Etoc15
TEMPERATURE (°C)
PROPAGATION DELAY (ns)3510-15
tRPHL
tRPLH
DRIVER PROPAGATION vs. TEMPERATURE
(MAX13488E)
MAX13487Etoc13
TEMPERATURE (°C)
DRIVER PROPAGATION DELAY (ns)3510-15
tDPLH
tDPHL
RL = 10kΩ
DRIVER PROPAGATION vs. TEMPERATURE
(MAX13488E)
MAX13487Etoc14
TEMPERATURE (°C)
DRIVER PROPAGATION DELAY (ns)3510-15
tDPLH
tDPHL
RL = 110Ω
Typical Operating Characteristics (continued)
(VCC= +5.0V, TA= +25°C, unless otherwise noted.)
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
Typical Operating Characteristics (continued)
(VCC= +5.0V, TA= +25°C, unless otherwise noted.)
RECEIVER PROPAGATION vs. TEMPERATURE
(MAX13488E)
MAX13487Etoc16
TEMPERATURE (°C)
RECEIVER PROPAGATION (ns)3510-15
tRPLH
tRPHL
DRIVER PROPAGATION (500kbps)
(MAX13487E)
MAX13487Etoc17DI
2V/div
A-B
5V/div
400ns/div
DRIVER PROPAGATION (16Mbps)
(MAX13488E)
MAX13487Etoc18DI
2V/div
A-B
5V/div
10ns/div
WAVEFORM INTENSITY: 68%
RECEIVER PROPAGATION (16Mbps)
(MAX13488E)
MAX13487Etoc19
2V/div
2V/div
2V/div
10ns/div
DRIVING 16nF (19.2kbps)
(MAX13487E)
MAX13487Etoc20DI
2V/div
A-B
5V/div
10µs/div
DRIVING 16nF (19.2kbps)
(MAX13488E)
MAX13487Etoc21DI
2V/div
A-B
5V/div
10µs/div
DRIVING 16nF (750kbps)
(MAX13488E)
MAX13487Etoc22DI
2V/div
A-B
5V/div
400ns/div
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
VODCL
RDIFF
RDIFFVOC
Figure 1. Driver DC Test Load
VID
VCC
GNDCL
Figure 2. Driver-Timing Test Circuit
1.5V1.5V
tDPLHtDPHL1/2 VO
1/2 VO
tDDD, tREDRO
(RO PULLED LOW)
10%
90%
10%
90%
-VO
VDIFF
VDIFF = V(A) - V(B)
tHLtLH
f = 1MHz, tLH ≤ 3ns, tHL ≤ 3ns
VCCRE = VCC
Figure 3. Driver Propagation Delays
Test Circuits and Waveforms
MAX13487E/MAX13488EHalf-Duplex RS-485-/RS-422-
Compatible Transceiver with
AutoDirection Control
tDZH(SHDN)
tDZL(SHDN)
1.5V
2.3V
2.3V
OUTPUT NORMALLY HIGH
OUTPUT NORMALLY LOW
VCC
VCC
A, B
A, B
VOL
SHDN
500ΩOUTPUT
UNDER TEST
Figure 4. Driver Enable and Disable Times
VIDRECEIVER
OUTPUTATE
Figure 5. Receiver-Propagation-Delay Test Circuit
1.5V1.5V
-1V
f = 1MHz, tLH ≤ 3ns, tHL ≤ 3ns
tRPHL
tRSKEW = | tRPHL - tRPLH |
tRPLH
VOH
VOL
Figure 6. Receiver Propagation Delays
Test Circuits and Waveforms (continued)

Partno	Mfg	Dc	Qty	Available	Descript
MAX13487EESA+T \|MAX13487EESAT	MAXIM	N/a	25000	avai	Half-Duplex RS-485/RS-422-Compatible Transceiver with AutoDirection Control
MAX13488EESA+T	MAXIM	N/a	2372	avai	Half-Duplex RS-485/RS-422-Compatible Transceiver with AutoDirection Control