MAX1482 Maxim, MAX1482 Datasheet
MAX1482
Manufacturer Part Number
MAX1482
Description
20A / 1.8-Unit-Load / Slew-Rate-Limited RS-485 Transceivers
Manufacturer
Maxim
Datasheet
1.MAX1482.pdf
(12 pages)
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The MAX1482 and MAX1483 are low-power trans-
ceivers for RS-485 and RS-422 communication. Both
feature slew-rate-limited drivers that minimize EMI and
reduce reflections caused by improperly terminated
cables. Data rates are guaranteed up to 250kbps.
The MAX1482/MAX1483 draw only 20µA of supply cur-
rent. Additionally, they have a low-current shutdown
mode that consumes only 0.1µA. Both parts operate
from a single +5V supply.
Drivers are short-circuit current limited and are protect-
ed 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 MAX1482 is full duplex and the MAX1483 is half
duplex. Both parts have a
that guarantees up to 256 transceivers on the bus.
________________________Applications
19-0367; Rev 0; 2/95
_________Typical Operating Circuits
Call toll free 1-800-998-8800 for free samples or literature.
_______________General Description
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM
RO
DE
RE
DI
MAX1482 appears at end of data sheet.
1
2
3
4
DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH.
TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.
Low-Power RS-485/RS-422 Networks
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Large 256-Node LANs
D
R
7
6
________________________________________________________________ Maxim Integrated Products
8
5
B
A
+5V
Rt
20µA,
V
GND
CC
1
MAX1483
⁄
8
-unit-load input impedance
Rt
1
⁄
B
A
8
-Unit-Load, Slew-Rate-Limited
R
D
DE
RE
DI
RO
____________________________Features
_________________Pin Configurations
______________Ordering Information
MAX1482CPD
MAX1482CSD
MAX1482EPD
MAX1482ESD
MAX1483CPA
MAX1483CSA
MAX1483CUA
MAX1483EPA
MAX1483ESA
Low 20µA Operating Current
Slew-Rate Limited for Reduced EMI and
Reduced Reflections
0.1µA Low-Current Shutdown Mode
Designed for RS-485 and RS-422 Applications
Operate from a Single +5V Supply
-7V to +12V Common-Mode Input Voltage Range
Allows up to 256 Transceivers on the Bus—
Guaranteed (
Current Limiting and Thermal Shutdown for
Driver Overload Protection
MAX1482 appears at end of data sheet.
TOP VIEW
PART
RS-485 Transceivers
V
RO
DE
RO
RE
CC
RE
DI
1
B
⁄
8
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-unit load)
1
2
3
4
1
2
3
4
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
MAX1483
D
DIP/SO
R
MAX
8
7
6
5
8
7
6
5
14 Plastic DIP
14 SO
14 Plastic DIP
14 SO
8 Plastic DIP
8 SO
8 µMAX
8 Plastic DIP
8 SO
V
B
A
GND
GND
DI
DE
PIN-PACKAGE
A
CC
1
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