HT3485EBRZ

The 3485 is low-power transceivers for RS-485 and RS- 422 communication. IC contains one driver and one receiver. The driver slew rates of the HT3485 is not limited, allowing them to transmit up to 10Mbps. These transceivers draw between 120μA and 500μA of supply current when unloaded or fully loaded with disabled drivers. All parts operate from a single 3.3V supply. Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places 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.

Applications

• 3485 transceivers are designed for bidirectional data communications on multipoint bus transmission lines.
• These parts can also be used as line repeaters, with cable lengths longer than 4000 feet.

Key features

• Low Quiescent Current: 120μA
• -7V to +12V Common-Mode Input Voltage Range
• Three-State Outputs
• 80ns Propagation Delays, 5ns Skew
• Half-Duplex Versions Available
• Operate from a Single 3.3V Supply
• Allows up to 32 Transceivers on the Bus
• Data rate: 10 Mbps
• Current-Limiting and Thermal Shutdown for Driver Overload Protection
• Enhanced ESD Specifications: ±15KV IEC61000-4-2 Air Discharge ±8KV IEC61000-4-2 Contact Discharge