MAX1482 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – 20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 Transceivers

19-0367; Rev 0; 2/95
20µA, ¹â„₈-Unit-Load, Slew-Rate-Limited
RS-485 Transceivers
_______________General Description
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 ¹â„8-unit-load input impedance
that guarantees up to 256 transceivers on the bus.
________________________Applications
Low-Power RS-485/RS-422 Networks
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Large 256-Node LANs
____________________________Features
o Low 20µA Operating Current
o Slew-Rate Limited for Reduced EMI and
Reduced Reflections
o 0.1µA Low-Current Shutdown Mode
o Designed for RS-485 and RS-422 Applications
o Operate from a Single +5V Supply
o -7V to +12V Common-Mode Input Voltage Range
o Allows up to 256 Transceivers on the Bus—
Guaranteed (¹â„8-unit load)
o Current Limiting and Thermal Shutdown for
Driver Overload Protection
______________Ordering Information
PART
MAX1482CPD
MAX1482CSD
MAX1482EPD
MAX1482ESD
MAX1483CPA
MAX1483CSA
MAX1483CUA
MAX1483EPA
MAX1483ESA
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°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
PIN-PACKAGE
14 Plastic DIP
14 SO
14 Plastic DIP
14 SO
8 Plastic DIP
8 SO
8 µMAX
8 Plastic DIP
8 SO
_________Typical Operating Circuits _________________Pin Configurations
RO 1
R
RE 2
DE 3
DI 4 D
+5V
8
VCC
7B
Rt
6
A
5
GND
MAX1483
B
Rt
A
DE
DI
D
R
RO
RE
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.
TOP VIEW
RO 1
RE 2
DE 3
DI ⁴
R
D
DIP/SO
8 V_CC
7B
6A
5 GND
B1
VCC ₂
RO 3
RE 4
MAX1483
8A
7 GND
6 DI
5 DE
µMAX
MAX1482 appears at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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