DALLAS, Dec. 3 /PRNewswire/ -- Texas Instruments (TI) (NYSE: TXN) today introduced a family of +/- 70V, fault protected RS-485 transceivers that achieve overvoltage protection with no external termination needed. These low-power devices serve as drop-in upgrades to existing RS-485 designs without costly board redesigns. The new half- and full-duplex transceivers simplify design in industrial automation, motor control and heating, ventilating, and air conditioning (HVAC) equipment. (See http://www.ti.com/sn65hvd1794-pr.)

The SN65HVD17xx family is designed to survive overvoltage faults, such as direct shorts to power supplies, miswiring faults, connector failures, cable crushes, and tool misapplications. The widest common mode, from -20V to -25V, allows for operation in harsh environments with large ground differences. These transceivers are offered in either a SOIC or DIP package and operate at a variety of speed grades such as 128 Kbps, 1 Mbps, and 10 Mbps to meet the needs of a variety of applications.

The SN65HVD1780/1/2 operate over a wide voltage range from 3V to 5V, enabling applications that have fluctuating power sources. The SN65HVD1794 has a cable invert pin, which allows for simple correction bus wires that were incorrectly configured. Additionally, the SN65HVD17xx family offers many integrated features such as:

    -- Bus ESD protection +/- 16k-V JEDEC human body model
    -- Failsafe receiver for open-circuit, short-circuit and idle-bus
       conditions
    -- Power-up, power-down and glitch-free operation
    -- Supports up to 256 or 320 nodes

The ultra low-power MSP430 microcontrollers and SN65HVD17xx family can be used together to create a low-power solution for a single control node. The SN65HVD17xx family contributes to TI's broad interface product offering, which includes families of products for M-LVDS, LVDS, CAN, I2C, ESD, RS-485, RS-232 and PCI-Express standards. Please see http://www.ti.com/interface for more information.

Availability

The SN65HVD17xx family is available online today. Details and suggested resale pricing are listed below for each device in 1000-piece quantities. Samples are available at http://www.ti.com/sn65hvd1794-pr.

    Part Number    Signaling   Duplex     Features         Package     Price
                     Rate
    SN65HVD1780    115 Kbps     Half   3V to 5V VCC        SOIC/DIP    $1.85
    SN65HVD1781    1 Mbps       Half   3V to 5V VCC        SOIC/DIP    $1.85
    SN65HVD1782    10 Mbps      Half   3V to 5V  VCC       SOIC/DIP    $2.00
    SN65HVD1785    115 Kbps     Half   Wide Common Mode    SOIC/DIP    $1.85
    SN65HVD1786    1 Mbps       Half   Wide Common Mode    SOIC/DIP    $1.85
    SN65HVD1787    10 Mbps      Half   Wide Common Mode    SOIC/DIP    $2.00
    SN65HVD1791    115 Kbps     Full   Wide Common Mode      SOIC      $1.90
    SN65HVD1792    1 Mbps       Full   Wide Common Mode      SOIC      $1.90
    SN65HVD1793    10 Mbps      Full   Wide Common Mode      SOIC      $2.05
    SN65HVD1794    115 Kbps     Half   Cable Invert          SOIC      $1.95

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SOURCE Texas Instruments