The MAX3480EA/MAX3480EB are electrically isolated
RS-485/RS-422 data-communications interfaces. The
RS-485/RS-422 I/O pins are protected against ±15kV
electrostatic discharge (ESD) shocks, without latchup.
Transceivers, optocouplers, and a transformer are all
included in one low-cost, 28-pin PDIP package. A single
+3.3V supply on the logic side powers both sides
of the interface.
The MAX3480EB features reduced-slew-rate drivers
that minimize EMI and reduce reflections caused by
improperly terminated cables, allowing error-free data
transmission at data rates up to 160kbps. The
MAX3480EA's driver slew rate is not limited, allowing
transmission rates up to 2.5Mbps.
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 MAX3480EA/MAX3480EB are guaranteed to withstand
1260VRMS (1min) or 1520VRMS (1s). Their isolated
inputs and outputs meet RS-485/RS-422 specifications.
Key Features
Applications/Uses
Isolated Data Interface Guaranteed to 1260VRMS
(1min)
±15kV ESD Protection for I/O Pins
Slew-Rate-Limited Data Transmission (160kbps for
MAX3480EB)
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