8339中文资料意法半导体数据手册PDF规格书

DESCRIPTION

The ST485E is al low power transceiver for RS-485 and RS-422 communication. Each driver output and receiver input is protected against ±15KV electrostatic discharge (H.B.M.) (ESD) shocks, without latcup. These parts contain one driver and one receiver in half duplex configuration.

This transceiver draw 300µA (typ.) of supply current when unloaded or fully loaded with disabled drivers.

■ LOW QUIESCENT CURRENT: 300µA

■ 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

■ ESD PROTECTION:

±15KV (H.B.M.)

±8KV (IEC-1000-4-2 CONTACT DISCHARGE)

■ ALLOWS UP TO 64 TRANSCEIVERS ON THE BUS