DESCRIPTION

       The AT3160/AT3161/AT3162 are programmable RS-232/RS-485/422 multiprotocol transceivers. The AT3160/AT3161 are pin programmable as a 2TX/2RX RS-232 interface or a single RS-485/422 transceiver. The AT3162 is configured as a 2TX/2RX RS-232 interface and a single RS-485/422 transceiver simultaneously.
       All devices incorporate a proprietary low-dropout transmitter output stage and an on-board dual charge pump to allow RS-232 and RS-485/422 compliant performance from a +3V to +5.5V supply. These devices also feature pin-selectable transmitter slew rates for both RS-232 and RS-485/422 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-485/422 mode and up to 1Mbps in RS-232 mode.  
      The AT3160/AT3162 offer a flow-through pinout that facilitates board layout. The  The AT3160/AT3161/AT3162 are available in tiny SSOP packages and operate from -40°C to +85°C.

FEATURES

Flexible Options for RS-232 and RS-422/485 Operation in One Package

-Simultaneous 2TX/2RX RS-232 and Half-Duplex

-RS-485 Transceiver Operation (MAX3162)

-Pin-Programmable as Either 2TX/2RX RS-232 or Half/Full RS-485 Transceiver (MAX3160, MAX3161)

Integrated Protection Increases Robustness

-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

APPLICATIONS

Point-of-sales Equipment

Peripherals

industrial Controls

RS-232 to RS-485

Interface Converters

TYPICAL CRICUIT