Top

Product details

Parameters

Operating temperature range (C) 0 to 70 open-in-new Find other Other interfaces

Package | Pins | Size

SSOP (DB) 20 38 mm² 5.3 x 7.2 open-in-new Find other Other interfaces

Features

  • Single-Chip Interface Solution for the 9-terminal GeoPort™ Host (DTE)
  • Designed to Operate up to 4 Mbit/s Full Duplex
  • Single 5-V Supply Operation
  • 6-kV ESD Protection on All Terminals
  • Backward compatible With AppleTalk™ and LocalTalk™
  • Combines Multiple Components into a Single-chip Solution
  • Complements the SN75LBC777 9-Terminal GeoPort Peripheral (DCE) Interface Device
  • LinBiCMOS™ Process Technology

GeoPort, LocalTalk, and AppleTalk are trademarks of Apple Computer, Incorporated.
LinBiCMOS is a trademark of Texas Instruments Incorporated.

open-in-new Find other Other interfaces

Description

The SN75LBC776 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 megabits per second (Mbit/s) full duplex. GeoPort is a serial communications standard that is intended to replace the RS-232, Appletalk, and LocalTalk printer ports all in one connector in addition to providing real-time data transfer capability. It provides point-to-point connections between GeoPort-compatible 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 GeoPort is backwardly compatible to both LocalTalk and AppleTalk.

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-uF 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.

open-in-new Find other Other interfaces
Download

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Data sheet Single-Chip Geoport Transceiver datasheet (Rev. B) Mar. 19, 2002

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Design tools & simulation

SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide

CAD/CAE symbols

Package Pins Download
SSOP (DB) 20 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos