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MAX1487C/D

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
Maxim Integrated 13
MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
Line Length vs. Data Rate
The RS-485/RS-422 standard covers line lengths up to
4000 feet. For line lengths greater than 4000 feet, see
Figure 23.
Figures 19 and 20 show the system differential voltage
for the parts driving 4000 feet of 26AWG twisted-pair
wire at 110kHz into 120Ω loads.
Typical Applications
The MAX481, MAX483, MAX485, MAX487–MAX491, and
MAX1487 transceivers are designed for bidirectional data
communications on multipoint bus transmission lines.
Figures 21 and 22 show typical network applications
circuits. These parts can also be used as line
repeaters, with cable lengths longer than 4000 feet, as
shown in Figure 23.
To minimize reflections, the line should be terminated at
both ends in its characteristic impedance, and stub
lengths off the main line should be kept as short as possi-
ble. The slew-rate-limited MAX483 and MAX487–MAX489
are more tolerant of imperfect termination.
DI
V
Y
-V
Z
RO
5V
0V
1V
0V
-1V
5V
0V
2μs/div
DI
V
Y
-V
Z
RO
5V
0V
1V
0V
-1V
5V
0V
2μs/div
DI RO DE
RE
A
B
RE
RERE
RO
RO
RO
DI
DI
DI
DE
DE
DE
D
D
D
R
R
R
BB
B
AAA
120Ω
120Ω
D
R
MAX481
MAX483
MAX485
MAX487
MAX1487
Figure 19. MAX481/MAX485/MAX490/MAX491/MAX1487 System
Differential Voltage at 110kHz Driving 4000ft of Cable
Figure 20. MAX483, MAX487–MAX489 System Differential
Voltage at 110kHz Driving 4000ft of Cable
Figure 21. MAX481/MAX483/MAX485/MAX487/MAX1487 Typical Half-Duplex RS-485 Network
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
14 Maxim Integrated
MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
Figure 22. MAX488–MAX491 Full-Duplex RS-485 Network
120Ω
120Ω
R
D
RO
RE
DE
DI
A
B
Y
120Ω
120Ω
DI
DI DIRO RO
RO
DE DE
DE
RE
RE
RE
Z
Z
Z
Z
Y
Y
Y
AA
A
BB
B
D
D
D
R
R
R
MAX488–MAX491
NOTE: RE AND DE ON MAX489/MAX491 ONLY.
Figure 23. Line Repeater for MAX488–MAX491
120Ω
120Ω
DATA IN
DATA OUT
R
D
RO
RE
DE
DI
A
B
Z
Y
MAX488–MAX491
NOTE: RE AND DE ON MAX489/MAX491 ONLY.
Isolated RS-485
For isolated RS-485 applications, see the MAX253 and
MAX1480 data sheets.
Low-Power, Slew-Rate-Limited
RS-485/RS-422 Transceivers
Maxim Integrated 15
MAX481/MAX483/MAX485/
MAX487–MAX491/MAX1487
_______________Ordering Information
*
Contact factory for dice specifications.
14 CERDIP-55°C to +125°CMAX489MJD
14 SO-40°C to +85°CMAX489ESD
14 Plastic DIP-40°C to +85°CMAX489EPD
Dice*0°C to +70°CMAX489C/D
14 SO0°C to +70°CMAX489CSD
14 Plastic DIP0°C to +70°C
MMAAXX448899
CPD
8 CERDIP-55°C to +125°CMAX488MJA
8 SO-40°C to +85°CMAX488ESA
8 Plastic DIP-40°C to +85°CMAX488EPA
Dice*0°C to +70°CMAX488C/D
8 SO0°C to +70°CMAX488CSA
8 Plastic DIP0°C to +70°C
MMAAXX448888
CPA
8 CERDIP-55°C to +125°CMAX487MJA
8 SO-40°C to +85°CMAX487ESA
8 Plastic DIP-40°C to +85°CMAX487EPA
Dice*0°C to +70°CMAX487C/D
8 SO0°C to +70°CMAX487CSA
8 Plastic DIP0°C to +70°C
MMAAXX448877
CPA
8 CERDIP-55°C to +125°CMAX485MJA
8 SO-40°C to +85°CMAX485ESA
8 Plastic DIP-40°C to +85°CMAX485EPA
Dice*0°C to +70°CMAX485C/D
8 SO0°C to +70°CMAX485CSA
8 Plastic DIP0°C to +70°C
MMAAXX448855
CPA
8 CERDIP
-55°C to +125°CMAX483MJA
8 SO-40°C to +85°CMAX483ESA
8 Plastic DIP-40°C to +85°CMAX483EPA
8 CERDIP-55°C to +125°CMAX481MJA
8 Plastic DIP0°C to +70°C
MMAAXX448811
CPA
PIN-PACKAGETEMP RANGEPART
14 CERDIP-55°C to +125°CMAX491MJD
14 SO-40°C to +85°CMAX491ESD
14 Plastic DIP-40°C to +85°CMAX491EPD
Dice*0°C to +70°CMAX491C/D
14 SO0°C to +70°CMAX491CSD
14 Plastic DIP0°C to +70°C
MMAAXX449911
CPD
8 CERDIP-55°C to +125°CMAX490MJA
8 SO-40°C to +85°CMAX490ESA
8 Plastic DIP-40°C to +85°CMAX490EPA
Dice*0°C to +70°CMAX490C/D
8 Plastic DIP0°C to +70°C
MMAAXX449900
CPA
PIN-PACKAGETEMP RANGEPART
8 SO-40°C to +85°CMAX481ESA
8 µMAX0°C to +70°CMAX485CUA
8 µMAX0°C to +70°CMAX487CUA
8 µMAX0°C to +70°CMAX488CUA
8 SO0°C to +70°CMAX490CSA
8 µMAX0°C to +70°CMAX490CUA
__Ordering Information (continued)
8 CERDIP-55°C to +125°CMAX1487MJA
8 SO-40°C to +85°CMAX1487ESA
8 Plastic DIP-40°C to +85°CMAX1487EPA
Dice*0°C to +70°CMAX1487C/D
8 SO0°C to +70°CMAX1487CSA
8 Plastic DIP0°C to +70°C
MMAAXX11448877
CPA
8 µMAX0°C to +70°CMAX1487CUA
8 µMAX0°C to +70°CMAX483CUA
Dice*0°C to +70°CMAX483C/D
8 SO0°C to +70°CMAX483CSA
8 Plastic DIP0°C to +70°C
MMAAXX448833
CPA
8 Plastic DIP-40°C to +85°CMAX481EPA
Dice*0°C to +70°CMAX481C/D
8 µMAX0°C to +70°CMAX481CUA
8 SO0°C to +70°CMAX481CSA
14 CERDIP-55°C to +125°CMAX491MSD/PR-T
14 CERDIP-55°C to +125°CMAX491MSD/PR
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P17

MAX1487C/D

Mfr. #:
Buy MAX1487C/D
Manufacturer:
Maxim Integrated
Description:
RS-422/RS-485 Interface IC Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers
Lifecycle:
New from this manufacturer.
Delivery:
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