OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

MAX1486EUB+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
MAX1481/MAX1484/MAX1485/MAX1486
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in µMAX Package
______________________________________________________________________________________ 13
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, use
the repeater application shown in Figure 16.
Figures 17 and 18 show the system differential voltage
for the parts driving 4000 feet of 26AWG twisted-pair
wire into 120Ω loads.
Typical Applications
The MAX1485/MAX1486 are designed for bidirectional
data communications on multipoint bus transmission
lines. Figures 19 and 20 show typical network applica-
tions circuits. These parts can also be used as line
repeaters with cable lengths longer than 4000 feet
(Figure 16).
To minimize reflections, terminate the line at both ends
in its characteristic impedance, and keep stub lengths
off the main line as short as possible. The slew-rate-lim-
ited MAX1481/MAX1485 are more tolerant of imperfect
termination than the MAX1484/MAX1486.
20dB/div
250kHz/div 2.5MHz0Hz
MAX1481/4/5/6-fig15
Figure 15. Driver Output Waveform and FFT Plot of
MAX1481/MAX1485 Transmitting a 20kHz Signal
120Ω
120Ω
DATA IN
DATA OUT
R
D
RO
RE
DE
DI
H/F
A
B
Z
Y
MAX1481
MAX1484
MAX1485
MAX1486
NOTE: RE ON MAX1481 AND MAX1484 ONLY.
H/F ON MAX1485 AND MAX1486 ONLY.
Figure 16. Line Repeater
V
A
- V
B
DI
RO
5V/div
5V/div
4V/div
5µs/div
MAX1481/4/5/6-fig17
Figure 17. MAX1481/MAX1485 System Differential Voltage at
50kHz Driving 4000 ft. of Unterminated Cable
V
A
- V
B
DI
RO
5V/div
5V/div
4V/div
1µs/div
MAX1481/4/5/6-fig18
Figure 18. MAX1484/MAX1486 System Differential Voltage at
200kHz Driving 4000 ft. of Unterminated Cable
MAX1481/MAX1484/MAX1485/MAX1486
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in µMAX Package
14 ______________________________________________________________________________________
Figure 19. Typical Half-Duplex RS-485 Network
DI RO DE
Z
RO
RO
RO
DI
DI
DI
DE
DE
DE
D
D
D
R
R
R
Z
Z
(Z)
(Y)
Y
Y
Y
120Ω
120Ω
D
R
MAX1485
MAX1486
V
CC
5V
H/F
V
CC
5V
H/F
V
CC
5V
V
CC
V
CC
H/F
MAX1481/MAX1484/MAX1485/MAX1486
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in µMAX Package
______________________________________________________________________________________ 15
120Ω
120Ω
R
D
RO
DE
DI
A
B
Y
RE* RE*
120Ω
120Ω
DI
DI DIRO RO
RO
DE DE
DE
RE
RE*
Z
Z
Z
Z
Y
Y
Y
A A
A
B B
B
D
D
D
R
R
R
MAX1481
MAX1484
MAX1485
MAX1486
*RE ON MAX1481 AND MAX1484 ONLY.
**H/F ON MAX1485 AND MAX1486 ONLY.
H/F**
H/F**
H/F**
H/F**
Figure 20. Typical Full-Duplex RS-485 Network
___________________Chip Information
TRANSISTOR COUNT: 396
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX1486EUB+

Mfr. #:
Buy MAX1486EUB+
Manufacturer:
Maxim Integrated
Description:
RS-422/RS-485 Interface IC 12Mbps RS485/RS422 Transceiver
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet