Dallas, Tex. Aimed at industrial applications, Texas Instruments Inc.'s latest 3.3-V and 5-V full-duplex RS-485 transceivers provide ESD protection in excess of 15-kV (human body model).
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.
The SN65HVD33/34/35 and SN65HVD53/54/55 RS-485 transceivers feature slew rate-controlled outputs to avoid unwanted reflections, and data transmission for signaling rates of 1, 5 and 25 Mbits/s. The SN65HVD33/34/35 and SN65HVD53/54/55 RS-485 transceivers also provide a 1/8-unit load option, which allows for up to 256 nodes on the bus. Power-supply options include 3.3-V operation for the SN65HVD33/34/35 devices and 5-V operation for the SN65HVD53/54/55 chips.
When in the low-current standby mode, the supply current of the SN65HVD33/34/35 typically drops to 22 nA. The SN65HVD53/54/55 devices provide bus drivers with differential output voltages above the RS-485/RS-422 requirements. This provides signal margin for applications with interconnection losses or noise immunity concerns.
The transceivers 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 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 SN65HVD33/34/35 devices and $1.75 for the SN65HVD53/54/55 devices in 1,000-unit quantities.
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Texas Instruments Inc., 1-972-644-5580, www.ti.com