The MAX1482 and MAX1483CPA are low-power transceivers for RS-485 and RS-422 communication. Both feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables. Data rates are guaranteed up to 250kbps. The MAX1482/MAX1483CPA draw only 20μA of supply current. Additionally, they have a low-current shutdown mode that consumes only 0.1μA. Both parts operate from a single +5V 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. The MAX1482 is full duplex and the MAX1483CPA is half duplex. Both parts have a 1/8-unit-load input impedance that guarantees up to 256 transceivers on the bus.
Feature
- Low 20μA Operating Current
- Slew-Rate Limited for Reduced EMI and Reduced Reflections
- 0.1μA Low-Current Shutdown Mode
- Designed for RS-485 and RS-422 Applications
- Operate from a Single +5V Supply
- -7V to +12V Common-Mode Input Voltage Range
- Allows up to 256 Transceivers on the Bus—Guaranteed (1/8-unit load)
- Current Limiting and Thermal Shutdown for Driver Overload Protection
Applications
- Industrial Control Local Area Networks
- Large 256-Node LANs
- Low-Power RS-485/RS-422 Networks
- Transceivers for EMI-Sensitive Applications
