Texas Instruments has introduced a CAN (controller area network) transceiver that conforms to all DeviceNet physical layer specifications, according to the company. The SN65HVD252 supports critical time budgets for latency and readily connects to a 3.3V microcontroller. Designed for operation in harsh industrial environments such as factory automation, process control equipment, networked sensors or building automation, this device features bus-pin voltage protection from -36 to 40-V, driver output current limiting, and over-temperature driver shutdown. The key features and benefits of the SN65HVD252 and SN65HVD253 include propagation delay, which is 10% faster than DeviceNet requirements allowing more flexibility in system timing budgets. The SN65HVD253, a similar industrial CAN transceiver, offers a listen-only loopback feature so that the local node controller can synchronise its baud rate with that of the CAN bus. Both devices work well with isolation devices such as an ISO7421 digital isolator.
