SN75LBC771 Datasheet | Texas Instruments

description The SN75LBC771 is a low-power Lin Bi CMOS™ device that incorporates the drivers and receivers for a 9-pin Geo Port host interface. Geo Port bines hybrid EIA/TIA-422-B and EIA/ TIA-423-B drivers and receivers to transmit data up to four-Mbit/s full duplex. Geo Port is a serial munications standard that is intended to replace the RS-232, Apple Talk, and printer ports all in one connector in addition to providing real-time data transfer capability. The SN75LBC771 provides point-to-point connections between Geo Port-patible devices with data transmission rates up to 4-Mbit/s full duplex featuring a hot-plug capability. Applications include connection to telephone, ISDN, digital sound and imaging, fax-data modems, and other traditional serial and parallel connections. The Geo Port is backwardly patible to both Local Talk and Apple Talk. DW PACKAGE (TOP VIEW) DA1 1 VEE 2 NC 3 NC 4 SHDN 5 DZ2 6 DY2 7 GND 8 DEN 9 DA2 10 20 GND 19 VCC 18 DY1 17 RY3 16 RB3 15 RA2 14 RY2 13 RB1 12 RA1 11 RY1 logic diagram (positive logic) DA2 10 DY2 DZ2 RY1 11 RA1 RB1 DA1 RY2 14 DY1 15 RA2 RY3 17 5 SHDN RB3 While the SN75LBC771 is powered off (VCC and VEE = 0 ), the outputs are in a high-impedance state. Also, when the shutdown (SHDN) terminal is high, all outputs go into a high-impedance state. A logic high on the driver enable (DEN) terminal places the outputs of the differential driver into a high-impedance state. All drivers and receivers have fail-safe mechanisms that ensure a high output state when the inputs are left open. The SN75LBC771 is characterized for operation over the 0°C to 70°C temperature range. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Geo Port, Local Talk, and Apple Talk are trademarks of Apple puter, Incorporated. Lin BICMOS is a trademark...