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DESCRIPTION

The ST75C176 is al low power transceiver for RS-485 and RS-422 communication. Each part contains one driver and one receiver. This transceiver draw 300?A (typ.) of supply current when unloaded or fully loaded with disabled drivers.

It operates from a single 5V supply.

Driver is short-circuit current limited and is protected against excessive power dissipation by thermal shutdown circuitry that placed 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 ST75C176 is designed for bi-directional data communications on multipoint bus transmission line (half-duplex applciations).

■ LOW QUIESCENT CURRENT: 300?A

■ DESIGNED FOR RS-485 INTERFACE APPLICATIONS

■ -7V TO 12V COMMON MODE INPUT VOLTAGE RANGE

■ DRIVER MAINTAINS HIGH IMPEDANCE IN 3-STATE OR WITH THE POWER OFF

■ 70mV TYPICAL INPUT HYSTERESIS

■ 30ns PROPAGATION DELAYS, 5ns SKEW

■ OPERATE FROM A SINGLE 5V SUPPLY

■ CURRENT LIMITING AND THERMAL SHUTDOWN FOR DRIVER OVERLOAD PROTECTION

■ ALLOWS UP TO 32 TRANSCEIVERS ON THE BUS

■ BIC MOS TECHNOLOGY