SN75LBC776
SN75LBC776 is TRANSCEIVER manufactured by Texas Instruments.
description
The SN75LBC776 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 megabits per second (Mbit/s) full duplex. Geo Port is a serial munications standard that is intended to replace the RS-232, Appletalk, and Local Talk printer ports all in one connector in addition to providing real-time data transfer capability. It provides point-to-point connections between Geo Port-patible devices with data transmission rates up to 4 Mbit/s full duplex and a hot-plug feature
. Applications include connection to telephony, integrated services digital network (ISDN), digital sound and imaging, fax-data modems, and other serial and parallel connections. The Geo Port is backwardly patible to both Local Talk and Apple Talk.
While the SN75LBC776 is powered-off (VCC = 0) the outputs are in a high-impedance state. When the shutdown (SHDN) terminal is high, the charge pump is powered down and the outputs are in a high-impedance state. The driver enable (DEN) terminal sends the outputs of the differential driver into a high-impedance state with a high input signal. All drivers and receivers have fail-safe mechanisms to ensure a high output state when the inputs are left open.
A switched-capacitor voltage converter generates the negative voltage required from a single 5-V supply using four 0.1-µF capacitors, two capacitors between the C+ and C- terminals and two capacitors between VEE and ground.
The SN75LBC776 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 Bi CMOS is a trademark of Texas Instruments...
