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SN75LBC776DWR

更新时间： 2024-09-16 02:58:43
品牌 Logo 应用领域
德州仪器 - TI 驱动信息通信管理光电二极管接口集成电路驱动器
页数 文件大小 规格书
17页 544K
描述
SINGLE-CHIP GeoPort TRANSCEIVER

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SN75LBC776DWR 数据手册

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SN75LBC776  
SINGLE-CHIP GeoPort TRANSCEIVER  
SLLS221B – NOVEMBER 1995 – REVISED MARCH 2002  
DB or DW PACKAGE  
(TOP VIEW)  
Single-Chip Interface Solution for the  
9-terminal GeoPort Host (DTE)  
Designed to Operate up to 4 Mbit/s Full  
Duplex  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
DA1  
GND  
V
V
EE  
CC  
Single 5-V Supply Operation  
C–  
C+  
DY1  
RY3  
RB3  
RA2  
RY2  
RB1  
RA1  
RY1  
6-kV ESD Protection on All Terminals  
SHDN  
DZ2  
DY2  
GND  
DEN  
DA2  
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  
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.  
WhiletheSN75LBC776ispowered-off(V =0)theoutputsareinahigh-impedancestate. Whentheshutdown  
CC  
(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 V and  
EE  
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.  
GeoPort, LocalTalk, and AppleTalk are trademarks of Apple Computer, Incorporated.  
LinBiCMOS is a trademark of Texas Instruments Incorporated.  
Copyright 2002, Texas Instruments Incorporated  
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.  
1
www.ti.com  
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