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SN75LBC777 PDF预览

SN75LBC777

更新时间: 2024-09-14 22:53:31
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
14页 211K
描述
SINGLE CHIP GEOPORTE/AppleTalkE TRANSCEIVER

SN75LBC777 数据手册

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SN75LBC777  
SINGLE CHIP GEOPORT /AppleTalk TRANSCEIVER  
SLLS227 – SEPTEMBER 1996  
DW PACKAGE  
(TOP VIEW)  
Single-Chip Interface Solution for the 9-Pin  
GeoPort Peripheral Data Circuit-  
Terminating Equipment (DCE) for the  
Intelligent Network Port  
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  
Designed to Operate up to 4-Mbits/s Full  
Duplex  
C–  
C+  
SHDN  
DZ2  
DY2  
GND  
DEN  
DA2  
DY1  
DY3  
DA3  
RB2  
RY2  
RB1  
RA1  
RY1  
Single 5-V Supply Operation  
10-kV ESD Protection on Bus Terminals  
Backward Compatible with AppleTalk and  
LocalTalk LANs  
Combines Multiple Components into a  
Single Chip Solution  
Complements the SN75LBC776 9-Terminal  
GeoPort Host Data Terminal Equipment  
(DTE) Interface Device  
logic diagram (positive logic)  
LinBiCMOS Process Technology  
description  
7
DY2  
DZ2  
10  
The SN75LBC777 is a low-power LinBiCMOS  
device that incorporate the drivers and receivers  
for a 9-pin GeoPort peripheral 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  
DA2  
6
9
DEN  
12  
13  
RA1  
RB1  
11  
RY1  
1
18  
17  
DY1  
DY3  
DA1  
real-time  
data  
transfer  
capability.  
The  
SN75LBC777 provides point-to-point connec-  
tions between GeoPort-compatible devices with  
data transmission rates up to 4-Mbit/s full duplex  
over a 4-foot cable. Applications include connec-  
tion to telephone, integrated services digital  
network (ISDN), digital sound and imaging,  
fax-data modems, and other traditional serial and  
parallel connections. The GeoPort is backwardly  
compatibletobothLocalTalkandAppleTalkLANs.  
16  
DA3  
14  
RY2  
15  
RB2  
5
SHDN  
19  
While the SN75LBC777 is powered off (V  
= 0)  
V
CC  
CC  
2
Charge Pump  
8
V
EE  
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. When high, the driver  
enable (DEN) terminal puts the outputs of the  
differential driver into a high-impedance state.  
GND  
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 1996, 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
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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