ST485E

Features:

 LOW QUIESCENT CURRENT: 300A
DESIGNED FOR RS-485 INTERFACE APPLICATIONS
-7V TO 12V COMMON MODE INPUT VOLTAGE RANGE
DRIVER MAINTAINS HIGH IMPEDANCE IN 3-STATEORWITHTHEPOWEROFF
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

Specifications

Symbol	Parameter	Value	Unit
VCC	Supply Voltage	7	V
VI	Control Input Voltage (RE, DE)	-0.5 to (V CC+ 0.5)	V
VDI	Driver Input Voltage (DI)	-0.5 to (VCC + 0.5)	V
VDO	Driver Output Voltage (A, B)	± 14	V
VRI	Receiver Input Voltage (A, B)	± 14	V
VRO	Receiver Output Voltage (RO)	0.5 to (VCC + 0.5)	V

AbsoluteMaximum Ratings are those values beyond which damage to the device may occur. Functional operation under thesecondition is not implied.


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 onedriver and one receiver in half duplex configuration.
This transceiver draw 300A (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 place the driver outputs into a high-impedance state.
The ST485E is designed for bi-directional data communications on multipoint bus transmission line (half-duplex applications).