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MAX1481 Datasheet(PDF) 1 Page - Maxim Integrated Products

Part No. MAX1481
Description  Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited, 12Mbps, RS-485/RS-422 Transceivers in uMAX Package
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX1481 Datasheet(HTML) 1 Page - Maxim Integrated Products

 
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
_______________General Description
The MAX1481/MAX1484/MAX1485/MAX1486 provide
software-selectable, half-/full-duplex, low-power, slew-
rate-limited, and high-speed (12Mbps) RS-485/RS-422
operation in a 10-pin µMAX package—the smallest
10-pin package available.
The software-selectable, half-/full-duplex MAX1485/
MAX1486 make obsolete the normally larger and more
expensive solutions required for selectable half-/full-
duplex RS-485/RS-422 operation: 1) a 14-pin, full-
duplex transceiver configured via jumpers between
receiver and transmitter lines, or 2) two 8-pin, half-
duplex transceivers, which require an additional invert-
er logic gate for software selectability.
The MAX1481/MAX1484 are functionally equivalent to
the industry-standard MAX491 and 75180, and are
designed for space-constrained, full-duplex RS-422
applications.
All parts contain one driver and one receiver and fea-
ture a 1/8-unit-load receiver input impedance, allowing
up to 256 transceivers on the bus. The MAX1481/
MAX1485 feature reduced-slew-rate drivers that mini-
mize EMI and reduce reflections caused by improperly
terminated cables, allowing error-free data transmission
up to 250kbps. The MAX1484/MAX1486 driver slew
rates are not limited, allowing them to transmit up to
12Mbps.
The MAX1481/MAX1484/MAX1485/MAX1486 draw only
300µA of supply current. The MAX1481 has a low-power
shutdown mode that reduces supply current to only
0.1µA. All devices operate from a single 5V supply.
Drivers are output 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.
____________________________Features
o 10-Pin µMAX Package: Smallest 10-Pin Package
o Software-Selectable Half-/Full-Duplex Operation
(MAX1485/MAX1486)
o 0.1µA Low-Current Shutdown Mode (MAX1481)
o Slew-Rate Limiting Allows Error-Free Data
Transmission (MAX1481/MAX1485)
o 12Mbps High-Speed Operation
(MAX1484/MAX1486)
o Allow up to 256 Transceivers on the Bus
________________________Applications
Low-Power RS-422/RS-485 Communications
Level Translators
Hand-Held Equipment
Battery-Powered Equipment
Transceiver for EMI-Sensitive Applications
Industrial-Control Local Area Networks
Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,
12Mbps, RS-485/RS-422 Transceivers in µMAX Package
________________________________________________________________
Maxim Integrated Products
1
19-1312; Rev 0; 10/97
PART
MAX1481CUB
MAX1481EUB
MAX1484CUB
0°C to +70°C
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
10 µMAX
10 µMAX
10 µMAX
______________Ordering Information
______________________________________________________________Selection Table
Half/Full
Duplex
Data
Rate
(Mbps)
MAX1481
Full
0.250
MAX1484
Full
12
Part
MAX1485
Selectable
0.250
MAX1486
Selectable
12
Slew-
Rate
Limited
Yes
No
Yes
No
Low-
Power
Shutdown
Driver
Enable
Yes
Yes
No
Yes
No
Yes
No
Yes
Quiescent
Current
(µA)
300
300
300
300
Transceivers
on Bus
256
256
256
256
Pin-
Package
10 µMAX
10 µMAX
10 µMAX
10 µMAX
MAX1484EUB
-40°C to +85°C
10 µMAX
Receiver
Enable
Yes
Yes
No
No
MAX1485CUB
MAX1485EUB
MAX1486CUB
0°C to +70°C
-40°C to +85°C
0°C to +70°C
10 µMAX
10 µMAX
10 µMAX
MAX1486EUB
-40°C to +85°C
10 µMAX


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