MAX3430 Maxim, MAX3430 Datasheet
MAX3430
Manufacturer Part Number
MAX3430
Description
80V Fault-Protected / Fail-Safe / 1/4-Unit Load / #.3V RS-485 Transceiver
Manufacturer
Maxim
Datasheet
1.MAX3430.pdf
(13 pages)
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The MAX3430 fault-protected RS-485 transceiver features
±80V protection from overvoltage signal faults on commu-
nication bus lines. Each device contains one driver and
one receiver, and the output pins can withstand faults,
with respect to ground, of up to ±80V. Even if the faults
occur when the transceiver is active, shut down, or pow-
ered off, the device will not be damaged. The MAX3430
operates from a 3.3V supply and features a slew-rate-lim-
ited driver that minimizes EMI and reduces reflections
caused by improperly terminated cables, allowing error-
free data transmission at data rates up to 250kbps. The
MAX3430 has a 1/4-unit-load receiver input impedance
allowing up to 128 transceivers on a single bus and fea-
tures fail-safe circuitry, which guarantees a logic-high
receiver output when the receiver inputs are open.
Hot-swap circuitry eliminates false transitions on the
data cable during circuit initialization or connection to a
live backplane. Short-circuit current limiting and ther-
mal-shutdown circuitry protect the driver against exces-
sive power dissipation.
The MAX3430 is available in 8-pin SO and 8-pin PDIP
packages, and is specified over commercial and indus-
trial temperature ranges.
19-2756; Rev 1; 4/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
RS-422/RS-485 Communications
Lighting Systems
Industrial-Control Local Area Networks
Profibus Applications
Multimaster RS-485 Networks
TOP VIEW
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________________________________________________________________ Maxim Integrated Products
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2
3
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1/4-Unit Load, +3.3V RS-485 Transceiver
General Description
D
DIP/SO
R
Applications
8
7
6
5
V
B
A
GND
CC
Pin Configuration and Typical Operating Circuit
±80V Fault-Protected, Fail-Safe,
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DE
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2
3
4
D
o ±80V Fault Protection
o ±12kV ESD Protection
o +3.3V Operation
o Internal Slew-Rate Limiting
o 250kbps Data Rate
o Allows Up to 128 Transceivers on the Bus
o -7V to +12V Common-Mode Input Voltage Range
o True Fail-Safe Inputs
o Hot-Swap Input Structure on DE
o Available in 8-Pin SO and PDIP Packages
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MAX3430CPA
MAX3430CSA
MAX3430EPA
MAX3430ESA
PART
8
7
6
5
V
CC
B
A
GND
Rt
0.1µF
-40°C to +85°C
-40°C to +85°C
Ordering Information
TEMP RANGE
0°C to +70°C
0°C to +70°C
MAX3430
Rt
B
A
R
D
DE
RE
PIN-PACKAGE
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
Features
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