AT3160
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 |