DESCRIPTION 

    Devices in the AT3483AE family (AT3483AE/ AT3485AE/AT3488AE/AT3490AE/AT3491AE) are ±20kV ESD-protected RS- 485/422 transceivers, optimized for extended cable runs in noisy environments. All devices operate from a single 3.3V supply.

    The AT3483AE and AT3485AE are half-duplex transceivers. The AT3488AE, AT3490AE, and AT3491AE are full-duplex transceivers. The AT3483AE/85AE have a 1-unit load receiver input impedance, allowing up to 32 transceivers on the bus. The AT3488AE/90AE/91AE have a 1/4-unit load receiver input impedance, allowing up to 128 transceivers on the bus. Each transceiver includes a fail-safe receiver, ensuring that the receiver output (RO) is high when inputs are shorted, open, or connected to a three-state bus.

    All devices feature enhanced electrostatic discharge (ESD) protection. All transmitter outputs and receiver inputs are protected to ±20kV HBM ESD, ±15kV Air-Gap ESD and ±8kV Contact ESD in accordance to IEC 61000-4-2.

    The AT3483AE, AT3485AE, AT3488AE, and AT3490AE are available in industry standard 8-pin SO package, while the AT3491AE is available in a 14-pin SO package.

Benefits and Features

    Integrated Protection Increases Robustness

    High ESD Protection

         -  ±20kV HBM ESD per JEDEC JS-001-2012

          -  ±15kV Air Gap per IEC 61000-4-2

         -  ±8kV Contact ESD per IEC 61000-4-2

    Short-Circuit Protected Outputs

    True Fail-Safe Receiver Prevents False Transition on Receiver Input Short or Open Events

    Hot-Swap Capability Eliminates False Transitions  During Power-Up or Hot Insertion

    High-Speed Data Rates up to 20Mbps

    Up to -40°C to +125°C Operating Temperature

    Allows Up to 128 Transceivers on the Bus

Applications

    Industrial-Control Local Area Networks

    Transceivers for EMI-Sensitive Applications

    Telecommuncations

Pin Configuration