SN75LBC773

GEOPORT

™ TRANSCEIVER

SLLS247C – FEBRUARY 1997 – NOVEMBER 1997

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POST OFFICE BOX 655303

Standard for the Intelligent Network Port

Duplex

Inputs

and LocalTalk

™

Single Chip Solution

GeoPort Peripheral (DCE) Interface Device

description

The SN75LBC773 is a low-power LinBiCMOS

device that incorporates the drivers and receivers

for a 9-pin GeoPort host interface. GeoPort

combines

hybrid

EIA/TIA-422-B

and

EIA/

TIA-423-B drivers and receivers to transmit data

up to four-Mbit/s full duplex. GeoPort is a serial

communications standard that is intended to

replace the RS-232, AppleTalk, and printer ports

all in one connector in addition to providing

real-time

data

transfer

capability.

The

SN75LBC773 provides point-to-point connec-

tions between GeoPort-compatible 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

GeoPort is backwardly compatible to both

LocalTalk and AppleTalk.

high on the driver enable (DEN) or logic low on the receive enable (REN) terminals places the outputs of the

differential driver and receivers, respectively, 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 SN75LBC773 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.

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DA1

NC

NC

REN

DZ2

DY2

GND

DEN

DA2

GND

DY1

RY3

RB3

RA2

RY2

RB1

RA1

RY1

DW PACKAGE

(TOP VIEW)

DY2

DZ2

RY1

DY1

RY2

RY3

DA2

DEN

RB1

RA1

DA1

RA2

RB3

REN

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logic diagram (positive logic)

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright

© 1997, Texas Instruments Incorporated

GeoPort, LocalTalk, and AppleTalk are trademarks of Apple Computer, Incorporated.

LinBiCMOS is a trademark of Texas Instruments Incorporated.