MAX3471 Maxim, MAX3471 Datasheet
MAX3471
Manufacturer Part Number
MAX3471
Description
1.6A / RS-485/RS-422 / Half-Duplex / Differential Transceiver for Battery-Powered Systems
Manufacturer
Maxim
Datasheet
1.MAX3471.pdf
(8 pages)
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The MAX3471 half-duplex transceiver is intended for
lithium battery-powered RS-485/RS-422 applications. It
draws only 1.6µA (typical) supply current from a 3.6V
supply with the receiver enabled and the driver dis-
abled. Its wide 2.5V to 5.5V supply voltage guarantees
operation over the lifetime of a lithium battery.
This device features true fail-safe operation that guar-
antees a logic-high receiver output when the receiver
inputs are open or shorted. This means that the receiv-
er output will be a logic high if all transmitters on a ter-
minated bus are disabled (high impedance). The
MAX3471 has a 1/8-unit load input resistance. When
driver outputs are enabled and pulled above V
below GND, internal circuitry prevents battery back-
charging.
The MAX3471 is available in an 8-pin µMAX package.
Differential Transceiver for Battery-Powered Systems
________________________Applications
19-0497; Rev 0; 2/98
________________General Description
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.
Remote Meter Reading
Battery-Powered Differential Communications
Level Translators
MAX3471
RO
DE
RE
DI
________________________________________________________________ Maxim Integrated Products
REMOTE UNIT
D
R
V
GND
CC
B
A
V
CC
B
1.6µA, RS-485/RS-422, Half-Duplex,
DI
TYPICAL HALF-DUPLEX RS-485 NETWORK
D
REMOTE UNIT
A
DE
RO
R
RE
CC
GND
or
V
CC
B
____________________________Features
_______________Ordering Information
___________________Pin Configuration
DI
MAX3471CUA
MAX3471EUA
TOP VIEW
1.6µA Supply Current with Receiver Enabled
+2.5V to +5.5V Single-Supply Operation
True Fail-Safe Receiver Input
Available in µMAX Package
1/8-Unit-Load Receiver Input
-7V to +10V Common-Mode Input Voltage Range
D
REMOTE UNIT
A
PART
DE
RO
R
RE
Typical Application Circuit
RO
RE
DE
DI
GND
1
2
3
4
-40°C to +85°C
B
A
TEMP. RANGE
0°C to +70°C
CENTRAL UNIT
MAX3471
V
CC
MAX
R
D
7
5
8
6
DE
RO
RE
DI
V
B
A
GND
CC
PIN-PACKAGE
8 µMAX
8 µMAX
0.1 F
V
CC
1
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