GENERAL DESCRIPTION

The ADM483E is a 5 V, low power data transceiver with ±15 kV ESD protection suitable for half-duplex communication on multipoint bus transmission lines. The ADM483E is designed for balanced data transmission and complies with TIA/EIA Standards RS-485 and RS-422, which allow up to 32 transceivers on a bus.

The ADM483E has a low current shutdown mode in which it consumes only 0.1 μA.

Because only one driver is enabled at any time, the output of a disabled or power-down driver is three-stated to avoid overloading the bus.

Drivers are short-circuit current-limited and are protected against excessive power dissipation by thermal shutdown circuitry that places their 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 ADM483E is fully specified over the industrial temperature ranges and is available in 8-lead SOIC_N packages.

FEATURES

±15 kV ESD protection

250 kbps data rate

Reduced slew rate for low EM interference

Single 5 V ± 10 supply

−7 V to +12 V bus common-mode range

Up to 32 nodes on the bus

Receiver open-circuit, fail-safe design

Short-circuit protection

36 μA supply current

0.1 μA shutdown current

APPLICATIONS

Low power RS-485 systems

Electrically harsh environments

EMI sensitive applications

DTE-DCE interface

Packet switching

Local area networks