MAX3485E: 3.3V-Powered, ±15kV ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers

MAX3485E:  3.3V-Powered, ±15kV ESD-Protected, 12Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers

Devices in the MAX3485E family is ±15kV ESD-protected, +3.3V,  low-power transceivers for RS-485 and RS-422 communications. Each device contains one driver and one receiver. The 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. The partially slew-rate-limited transmits up to 2.5Mbps. The MAX3485E transmit at up to 12Mbps.
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 protect- ed 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 feature full-duplex communication, while the MAX3485E is designed for half- duplex communication.

 

Features

  • 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 ♦ Guaranteed 12Mbps Data Rate
  • Slew-Rate Limited for Errorless Data Transmission
  • 2nA Low-Current Shutdown Mode
  • -7V to +12V Common-Mode Input Voltage Range
  • Full-Duplex and Half-Duplex Versions Available
  • Industry-Standard 75176 Pinout
  • Current-Limiting and Thermal Shutdown for Driver Overload Protection

Applications

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

 

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