has introduced six full-duplex RS-485 transceivers that allow up to 256 devices on a single RS-485 bus.
With electrostatic discharge (ESD) protection in excess of 15 kV (human body model), the products provide an interface for both RS-485 and RS-422 applications such as industrial and building automation, point-of-sale terminals and networks, data terminal equipment/data communications equipment interfaces, and utility meters.
The SN65HVD33/34/35 and SN65HVD53/54/55 are differential line drivers and receivers, with separate input and output pins for full-duplex (4-wire) bus communication designs. The transceivers are designed for interoperation with ANSI TIA/EIA-485A, TIA/EIA-422-B, ITU-T V.11 and ISO 8482:1993 standard-compliant devices.
All the devices sport slew rate-controlled outputs to avoid unwanted reflections, and higher-accuracy data transmission for signalling rates of 1, 5 and 25 Mbps.
Power supply options include 3.3V operation for the HVD3x family and 5V operation for the HVD5x family. When in the low-current standby mode, the HVD3x supply current typically drops to 22 nA, making these devices useful for power-sensitive applications. The HVD5x family provides strong bus drivers with differential output voltages well above the RS-485/RS-422 requirements. This provides signal margin for applications with interconnection losses or noise immunity concerns.
The SN65HVD3x/5x devices are available now from TI and its authorized distributors. The devices are packaged in a 14-pin small-outline integrated circuit (SOIC) package and are priced at $1.85 for the HVD3x devices and $1.75 for the HVD5x devices in 1,000-unit quantities.
Record set at EPFL hyperloop test facility
The problem with hyperloops is capacity. High speed and small vehicles limit capacity. Junction design is key. Road vehicles can change lane with...