19-0367; Rev 1; 5/06
20µA, 1⁄8-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
The MAX1482 and MAX1483 are low-power transceivers 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 current. 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 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 MAX1482 is full duplex and the MAX1483 is half
duplex. Both parts have a 1⁄8-unit-load input impedance
that guarantees up to 256 transceivers on the bus.
________________________Applications
____________________________Features
♦ 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 (1⁄8-unit load)
♦ Current Limiting and Thermal Shutdown for
Driver Overload Protection
Ordering Information
PIN-PACKAGE
PKG
CODE
0°C to +70°C
14 PDIP
P14-3
PART
TEMP RANGE
MAX1482CPD
Low-Power RS-485/RS-422 Networks
MAX1482CSD
0°C to +70°C
14 SO
S14-4
Transceivers for EMI-Sensitive Applications
MAX1482EPD
-40°C to +85°C
14 PDIP
P14-3
Industrial-Control Local Area Networks
MAX1482ESD
-40°C to +85°C
14 SO
S14-4
MAX1483CPA
0°C to +70°C
8 PDIP
P8-1
MAX1483CSA
0°C to +70°C
8 SO
S8-5
MAX1483CUA
0°C to +70°C
8 µMAX®
U8-1
MAX1483EPA
-40°C to +85°C
8 PDIP
P8-1
MAX1483ESA
-40°C to +85°C
8 SO
S8-5
Large 256-Node LANs
_________Typical Operating Circuits
_________________Pin Configurations
TOP VIEW
RO
+5V
1
R
RE 2
D
DI
B
Rt
DI 4
Rt
A
D
5
8
VCC
7
DE 3
VCC
B
A
GND
6
D
A
5
GND
DIP/SO
6
DE 3
DI 4
8
7 B
R
DE
MAX1483
RO
1
RE 2
RO
R
8
A
7
GND
3
6
DI
RE 4
5
DE
B
NOTE: PIN LABELS Y AND Z ON TIMING, TEST, AND WAVEFORM
DIAGRAMS REFER TO PINS A AND B WHEN DE IS HIGH.
TYPICAL OPERATING CIRCUIT SHOWN WITH DIP/SO PACKAGE.
MAX1482 appears at end of data sheet.
1
VCC
2
RO
RE
MAX1483
µMAX
MAX1482 appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated products, Inc.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
MAX1482/MAX1483
_______________General Description
