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MAX1482, MAX1483
20µA, 1/8-Unit-Load, Slew-Rate-Limited, RS-485 Transceivers
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Status
Active: In Production.
Description
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.
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Data Sheet
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Key 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
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Applications/Uses
- Industrial Control Local Area Networks
- Large 256-Node LANs
- Low-Power RS-485/RS-422 Networks
- Transceivers for EMI-Sensitive Applications
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Key Specifications:
| RS-422/485 Line Driver/Receivers |
| Part Number |
Tx/Rx |
Duplex |
VSUPPLY
(V) |
ICC
(mA) |
Data Rate
(kbps) |
Tx EN |
Rx EN |
ICC (Shutdn.)
(µA) |
Rx/Tx on Bus |
Package/Pins |
Budgetary Price |
| typ |
min |
typ |
See Notes |
| MAX1482 |
1Tx + 1Rx |
Full |
5 |
0.02 |
250 |
Yes |
Yes |
0.1 |
256 |
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$1.24 @1k |
| MAX1483 |
Half |
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$1.24 @1k |
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See All RS-422/485 Line Driver/Receivers (165)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
Notes and Comments
1/8-unit load input impedance
Didn't Find What You Need?
Information Index
Document Ref.: 19-0367
Rev 1;
2006-06-28
This page last modified: 2007-05-29
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