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SN55121J PDF预览

SN55121J

更新时间: 2024-11-17 22:50:15
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德州仪器 - TI 驱动器
页数 文件大小 规格书
7页 120K
描述
DUAL LINE DRIVERS

SN55121J 数据手册

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SN55121, SN75121  
DUAL LINE DRIVERS  
SLLS074C – SEPTEMBER 1973 – REVISED MAY 1998  
SN55121 . . . J PACKAGE  
SN75121 . . . D OR N PACKAGE  
(TOP VIEW)  
Designed for Digital Data Transmission  
Over 50-to 500-Coaxial Cable, Strip  
Line, or Twisted Pair  
High Speed  
V
1A  
1B  
1
2
3
4
5
6
7
8
16  
15  
14  
CC  
t
= 20 ns Maximum at C = 15 pF  
2F  
2E  
pd  
L
1C  
TTL Compatible With Single 5-V Supply  
2.4-V Output at I = 75 mA  
13 2D  
12 2C  
1D  
OH  
1E  
Uncommitted Emitter-Follower Output  
Structure for Party-Line Operation  
11  
10  
9
2B  
2A  
2Y  
1F  
1Y  
Short-Circuit Protection  
GND  
AND-OR Logic Configuration  
Designed for Use With Triple Line  
Receivers SN55122, SN75122  
SN55121 . . . FK PACKAGE  
(TOP VIEW)  
Designed to Be Interchangeable With  
Signetics N8T13  
description  
3
2
1
20 19  
18  
1C  
1D  
NC  
1E  
1F  
2E  
2D  
NC  
2C  
2B  
4
5
6
7
8
The SN55121 and SN75121 dual line drivers are  
designed for digital data transmission over lines  
having impedances from 50 to 500 . They are  
also compatible with standard TTL logic and  
supply-voltage levels.  
17  
16  
15  
14  
9 10 11 12 13  
The low-impedance emitter-follower outputs of  
the SN55121 and SN75121 can drive terminated  
lines such as coaxial cable or twisted pair. Having  
the outputs uncommitted allows wired-OR logic to  
be performed in party-line applications. Output  
short-circuit protection is provided by an internal  
clamping network that turns on when the output  
voltagedropsbelowapproximately1.5V. Allofthe  
inputs are in conventional TTL configuration and  
the gating can be used during power-up and  
power-down sequences to ensure that no noise is  
introduced to the line.  
NCNo internal connection  
THE SN75121 IS NOT  
RECOMMENDED FOR NEW DESIGNS  
The SN55121 is characterized for operation over  
the full military temperature range of 55°C to  
125°C. The SN75121 is characterized for  
operation from 0°C to 70°C.  
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.  
Copyright 1998, 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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