MAX3161E Datasheet

• Flexible Options for RS-232 and RS-422/485 Operation In One Package
  • Pin-Programmable As Either 2Tx/2Rx RS-232 or Half/Full RS-485 Transceiver (MAX3161E)
• Integrated Protection Increases Robustness
  • High ±15kV ESD HBM per JEDEC JS-001-2012
  • Transmitters and Receivers Protected Against Wiring Faults
  • True Fail-Safe Receiver Prevents False Transition on Receiver Input Short or Open
  • Short-Circuit Protection Over the Entire Common- Mode Voltage Range
  • Thermal Protection from Excessive Power Dissipation
  • Slew Rate Limiting Minimizes EM and Reduces Cable Reflections
• Integrated Charge Pump Circuitry Saves Board Space
  • Eliminates the Need for a Bipolar ±12V Supply
  • Enables Single Supply Operation From +3V to +5.5V Voltage Supply
• 1µA Shutdown Supply Current Saves Power
• Allows Up To 256 Transceivers on the Bus

• Industrial Controls
• Interface Converters
• Networking
• Peripherals
• Point-of-Sale Equipment
• RS-232 to RS-485
• Security Systems

The MAX3161E are programmable RS-232/RS-485/RS-422 multiprotocol transceivers. The MAX3161E are pin programmable as a 2Tx/2Rx RS-232 interface or a single RS-485/RS-422 transceiver.

The MAX3161E feature enhanced electrostatic discharge (ESD) protection. All of the transmitter outputs and receiver inputs are protected to ±15kV using the Human Body Model.

All devices incorporate a proprietary low-dropout trans- mitter output stage, and an on-board dual charge pump to allow RS-232- and RS-485-/RS-422-compliant performance from a +3V to +5.5V supply. These devices also feature pin-selectable transmitter slew rates for RS-232 and RS-485/RS-422 modes. Slew-rate limiting minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission up to 250kbps. Disabling slew-rate limiting allows these devices to transmit at data rates up to 10Mbps in RS-485/RS-422 mode and up to 1Mbps in RS-232 mode.

The MAX3161E are available in tiny SSOP packages and operate up to -40°C to +85°C temperature ranges.