TI introduces industry’s widest common mode, 70V, fault-protected RS-485 transceiver family

December 3, 2008

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
    -- 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


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
    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

About Texas Instruments

Texas Instruments (NYSE: TXN) helps customers solve problems and develop
new electronics that make the world smarter, healthier, safer, greener and
more fun. A global semiconductor company, TI innovates through
manufacturing, design and sales operations in more than 25 countries. For
more information, go to http://www.ti.com

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