The MAX3465-MAX3469 are high-speed differential
bus transceivers for RS-485 and RS-422 communications.
They are designed to meet TIA/EIA-422-B,
TIA/EIA-485-A, V.11, and X.27 standards. The transceiver
complies with the Profibus specification providing
+2.1V minimum output level with a 54Ω load, 40Mbps data rate, and output skew less than 2ns. Each
part contains one three-state differential line driver and
one differential input line receiver. The devices operate
from a +5V supply and feature true fail-safe circuitry,
which guarantees a logic-high receiver output when the
receiver inputs are open or shorted. This enables all
receiver outputs on a terminated bus to output logic
highs when all transmitters are disabled.
All devices feature a 1/4-standard-unit load receiver
input impedance that allows 128 transceivers on the
bus. Driver and receiver propagation delays are guaranteed
under 20ns for multidrop, clock distribution
applications. Drivers are short-circuit current limited
and are protected against excessive power dissipation
by thermal-shutdown circuitry. The driver and receiver
feature active-high and active-low enables, respectively,
that can be connected together externally to serve
as a direction control.
Key Features
Applications/Uses
Recommended for Profibus Applications
Up to 40Mbps Data Rate
15ns Transmitter Propagation Delay
20ns Receiver Propagation Delay
2ns Transmitter and Receiver Skew
High Differential Driver Output Level (2.1V on 54Ω)
Hot-Swap Versions
1µA Shutdown Supply Current
Low Supply Current Requirements (2.5mA, typ)
Allow Up to 128 Transceivers on the Bus
True Fail-Safe Receiver while Maintaining EIA/TIA-
485 Compatibility
Designed for Multipoint Transmissions on Long
or Noisy Bus Lines
Full-Duplex and Half-Duplex Versions Available
Phase Controls to Correct for Twisted-Pair
Reversal for 14-Pin Versions
Current-Limiting and Thermal Shutdown for
Driver Overload Protection
High-Speed RS-422 Communications
High-Speed RS-485 Communications
Industrial-Control Local Area Networks
Level Translators
Profibus Applications
Key Specifications:
RS-422/485 Line Driver/Receivers
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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