MAX1482CPD Datasheet Download

Part No.:
MAX1482CPD
Download:
Download Datasheet
Description:
[20A, 1.8-Unit-Load, Slew-Rate-Limited RS-485 Transceivers]
File Size:
144 K
Page:
12 Pages
Logo:
Manufacturer:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
PCB Prototype
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19-0367; Rev 0; 2/95
20µA,
1
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
1
8
-unit-load input impedance
that guarantees up to 256 transceivers on the bus.
____________________________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 (
1
8
-unit load)
o
Current Limiting and Thermal Shutdown for
Driver Overload Protection
MAX1482/MAX1483
______________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
________________________Applications
Low-Power RS-485/RS-422 Networks
Transceivers for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Large 256-Node LANs
_________Typical Operating Circuits
_________________Pin Configurations
TOP VIEW
RO
1
R
8
7
6
D
5
V
CC
B
A
GND
+5V
DE
MAX1483
RO
1
R
RE
2
DE
3
DI
4
D
8
7
B
Rt
6
A
5
GND
A
R
RE
V
CC
B
Rt
D
RE
2
DI
DE
3
DI
4
RO
DIP/SO
B
V
CC
1
2
3
8
A
GND
DI
DE
MAX1483
7
6
5
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.
RO
RE
4
µMAX
MAX1482 appears at end of data sheet.
MAX1482 appears at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.