MAX1487C/D

MAX1487C/D Datasheet


The MAX481, MAX483, MAX485, and MAX1487 are low-power transceivers for RS-485 and RS422 communication. Each part contains one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481, MAX485, MAX490, MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps.

Part Datasheet
MAX1487C/D MAX1487C/D MAX1487C/D (pdf)
Related Parts Information
MAX491C/D MAX491C/D MAX491C/D
PDF Datasheet Preview
Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers

The MAX481, MAX483, MAX485, and MAX1487 are low-power transceivers for RS-485 and RS422 communication. Each part contains one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489 feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, thus allowing error-free data transmission up to 250kbps. The driver slew rates of the MAX481, MAX485, MAX490, MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps.

These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. Additionally, the MAX481, MAX483, and MAX487 have a low-current shutdown mode in which they consume only 0.1µA. All parts operate from a single 5V supply.

Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.

The MAX487 and MAX1487 feature quarter-unit-load receiver input impedance, allowing up to 128 MAX487/ MAX1487 transceivers on the bus. Full-duplex communications are obtained using the while the MAX481, MAX483, MAX485, MAX487, and MAX1487 are designed for half-duplex applications.

Low-Power RS-485 Transceivers

Low-Power RS-422 Transceivers

Level Translators

Transceivers for EMI-Sensitive Applications

Industrial-Control Local Area Networks
__Next Generation Device Features
o For Fault-Tolerant Applications MAX3430 ±80V Fault-Protected, Fail-Safe, 1/4 Unit Load, +3.3V, RS-485 Transceiver ±15kV ESD-Protected, ±60V Fault-Protected, 10Mbps, Fail-Safe, RS-485/J1708 Transceivers
o For Space-Constrained Applications +5V, Fail-Safe, 20Mbps, Profibus RS-485/RS-422 Transceivers MAX3362 +3.3V, High-Speed, RS-485/RS-422 Transceiver in a SOT23 Package ±15kV ESD-Protected, 52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422, True Fail-Safe Receivers MAX3293/MAX3294/MAX3295 20Mbps, +3.3V, SOT23, RS-485/RS-422 Transmitters
o For Multiple Transceiver Applications ±15kV ESD-Protected, +3.3V, Quad RS-422 Transmitters
o For Fail-Safe Applications Fail-Safe, High-Speed 10Mbps , Slew-Rate-Limited RS-485/RS-422 Transceivers
o For Low-Voltage Applications MAX3483E/MAX3485E/MAX3486E/MAX3488E/ MAX3490E/MAX3491E +3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited, True RS-485/RS-422 Transceivers
Ordering Information appears at end of data sheet.

Table

PART HALF/FULL NUMBER DUPLEX

MAX481

Half

MAX483

Half

MAX485

Half

MAX487

Half

MAX488

Full

MAX489

Full

MAX490

Full

MAX491

Full

MAX1487

Half

DATA RATE Mbps

SLEW-RATE LIMITED

LOWPOWER SHUTDOWN

RECEIVER/ DRIVER ENABLE

QUIESCENT CURRENT

NUMBER OF RECEIVERS ON

PIN COUNT
8 14 8 14 8
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at

MAX481/MAX483/MAX485/

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers

ABSOLUTE MAXIMUM RATINGS

Supply Voltage VCC Control Input Voltage RE, DE ...................-0.5V to VCC + 0.5V Driver Input Voltage DI .............................-0.5V to VCC + 0.5V Driver Output Voltage A, B ...................................-8V to +12.5V

Receiver Input Voltage A, B .................................-8V to +12.5V

Receiver Output Voltage RO ....................-0.5V to VCC + 0.5V Continuous Power Dissipation TA = +70°C
8-Pin Plastic DIP derate 9.09mW/°C above +70°C ....727mW
14-Pin Plastic DIP derate 10.00mW/°C above +70°C ..800mW
8-Pin SO derate 5.88mW/°C above +70°C .................471mW
14-Pin SO derate 8.33mW/°C above +70°C ...............667mW 8-Pin µMAX derate 4.1mW/°C above +70°C ..............830mW 8-Pin CERDIP derate 8.00mW/°C above +70°C .........640mW 14-Pin CERDIP derate 9.09mW/°C above +70°C .......727mW Operating Temperature Ranges MAX4_ _C_ _/MAX1487C_ A ...............................0°C to +70°C MAX4_ _E_ _/MAX1487E_ A .............................-40°C to +85°C MAX4_ _M_/MAX1487MJA .............................-55°C to +125°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature soldering, 10sec .............................+300°C

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.

DC ELECTRICAL CHARACTERISTICS

VCC = 5V ±5%, TA = TMIN to TMAX, unless otherwise noted. Notes 1, 2

PARAMETER

Differential Driver Output no load VOD1

Differential Driver Output with load

VOD2

Change in Magnitude of Driver Differential Output Voltage for Complementary Output States

Driver Common-Mode Output Voltage

Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States

Input High Voltage

Input Low Voltage

Input Current

IIN1

Input Current A, B

IIN2

Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Output High Voltage Receiver Output Low Voltage

Three-State high impedance Output Current at Receiver

VTH VOH VOL

IOZR

CONDITIONS

R = 50Ω RS-422 R = 27Ω RS-485 , Figure 4

R = 27Ω or 50Ω, Figure 4

R = 27Ω or 50Ω, Figure 4

R = 27Ω or 50Ω, Figure 4

DE, DI, RE DE, DI, RE DE, DI, RE DE = 0V VCC = 0V or 5.25V, all devices except MAX487/MAX1487

MAX487/MAX1487, DE = 0V, VCC = 0V or 5.25V
-7V VCM 12V

VCM = 0V IO = -4mA, VID = 200mV IO = 4mA, VID = -200mV

VIN = 12V
Ordering Information

PART MAX481CPA MAX481CSA MAX481CUA MAX481C/D MAX481EPA MAX481ESA MAX481MJA MAX483CPA MAX483CSA MAX483CUA MAX483C/D MAX483EPA MAX483ESA MAX483MJA MAX485CPA MAX485CSA MAX485CUA MAX485C/D MAX485EPA MAX485ESA MAX485MJA MAX487CPA MAX487CSA MAX487CUA MAX487C/D MAX487EPA MAX487ESA MAX487MJA MAX488CPA MAX488CSA MAX488CUA MAX488C/D MAX488EPA MAX488ESA MAX488MJA MAX489CPD MAX489CSD MAX489C/D MAX489EPD MAX489ESD MAX489MJD

TEMP RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C
-40°C to +85°C -40°C to +85°C -55°C to +125°C
0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C

PIN-PACKAGE 8 Plastic DIP 8 SO 8 µMAX Dice* 8 Plastic DIP 8 SO 8 CERDIP 8 Plastic DIP 8 SO 8 µMAX Dice* 8 Plastic DIP 8 SO 8 CERDIP 8 Plastic DIP 8 SO 8 µMAX Dice* 8 Plastic DIP 8 SO 8 CERDIP 8 Plastic DIP 8 SO 8 µMAX Dice* 8 Plastic DIP 8 SO 8 CERDIP 8 Plastic DIP 8 SO 8 µMAX Dice* 8 Plastic DIP 8 SO 8 CERDIP 14 Plastic DIP 14 SO Dice* 14 Plastic DIP 14 SO 14 CERDIP
__Ordering Information continued

PART MAX490CPA MAX490CSA MAX490CUA MAX490C/D MAX490EPA MAX490ESA MAX490MJA MAX491CPD MAX491CSD MAX491C/D MAX491EPD MAX491ESD MAX491MJD MAX491MSD/PR MAX491MSD/PR-T MAX1487CPA MAX1487CSA MAX1487CUA MAX1487C/D MAX1487EPA MAX1487ESA MAX1487MJA

TEMP RANGE 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C
-40°C to +85°C -40°C to +85°C -55°C to +125°C
0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C -55°C to +125°C -55°C to +125°C 0°C to +70°C 0°C to +70°C 0°C to +70°C 0°C to +70°C -40°C to +85°C -40°C to +85°C -55°C to +125°C
*Contact factory for dice specifications.

PIN-PACKAGE 8 Plastic DIP 8 SO 8 µMAX Dice* 8 Plastic DIP 8 SO 8 CERDIP 14 Plastic DIP 14 SO Dice* 14 Plastic DIP 14 SO 14 CERDIP 14 CERDIP 14 CERDIP 8 Plastic DIP 8 SO 8 µMAX Dice* 8 Plastic DIP 8 SO 8 CERDIP

Maxim Integrated

MAX481/MAX483/MAX485/

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers

Package Information

For the latest package outline information and land patterns, go to Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.

PACKAGE TYPE 8 PDIP 8 SO 8 MAX
8 CERDIP 14 PDIP 14 SO
14 CERDIP

PACKAGE CODE P8-1 S8-2 U8-1 J8-2 P14-3 S14-1 J14-3

OUTLINE NO. 21-0043 21-0041 21-0036 21-0045 21-0043 21-0041 21-0045

LAND PATTERN NO.
90-0096 90-0092
90-0112

Maxim Integrated

MAX481/MAX483/MAX485/

Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
1/93 Initial release.
9/09 Changed column name in Selection Table to “Number of Receivers on Bus.”

PAGES CHANGED
9/14

Added MAX491MSD/PR and MAX491MSD/PR-T to data sheet. Updated Absolute Maximum Ratings.
2, 15

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated 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.

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Datasheet ID: MAX1487C/D 647355