MAX3483E Datasheet

• ESD Protection for RS-485 I/O Pins
  • ±15kV-Human Body Model
  • ±8kV-IEC 1000-4-2, Contact Discharge
  • ±15kV-IEC 1000-4-2, Air-Gap Discharge
• Operate from a Single +3.3V Supply-No Charge Pump Required
• Interoperable with +5V Logic
• Slew-Rate Limited for Errorless Data Transmission (MAX3483E)
• 2nA Low-Current Shutdown Mode (MAX3483E)
• -7V to +12V Common-Mode Input Voltage Range
• Full-Duplex and Half-Duplex Versions Available
• Industry-Standard 75176 Pinout (MAX3483E)
• Current-Limiting and Thermal Shutdown for Driver Overload Protection

• Industrial Control Local Area Networks
• Integrated Services Digital Networks
• Packet Switching
• Telecommunications
• Transceivers for EMI-Sensitive Applications

The MAX3483E are ±15kV ESD-protected, +3.3V, low-power transceivers for RS-485 and RS-422 communications. Each device contains one driver and one receiver. The MAX3483E feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps.

All devices feature enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model.

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 both inputs are open circuit.

The MAX3483E are designed for half-duplex communication.