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N8T14

更新时间： 2024-11-02 03:47:11
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
7页 102K
描述
TRIPLE LINE RECEIVERS

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N8T14 数据手册

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N8T14, SN55122, SN75122  
TRIPLE LINE RECEIVERS  
SLLS075B – D1334, SEPTEMBER 1973 – REVISED FEBRUARY 1993  
SN55122 . . . J PACKAGE  
N8T14, SN75122 . . . D OR N PACKAGE  
• Designed for Digital Data Transmission  
Over Coaxial Cable, Strip Line, or Twisted  
Pair  
(TOP VIEW)  
• Designed for Operation With 50-Ω to 500-Ω  
V
1A  
1B  
1
2
3
4
5
6
7
8
16  
15  
14  
CC  
Transmission Lines  
1S  
1R  
2R  
• TTL Compatible  
• Single 5-V Supply  
• Built-Input Threshold Hysteresis  
13 1Y  
12 3A  
2S  
2A  
11  
10  
9
3S  
3R  
3Y  
2B  
2Y  
• High-Speed . . . Typical Propagation Delay  
GND  
Time = 20 ns  
• Independent Channel Strobes  
SN55122 . . . FK PACKAGE  
(TOP VIEW)  
• Input Gating Increases Application  
Flexibility  
• Fanout to 10 Series 54/74 Standard Loads  
3
2
1
20 19  
18  
• Can Be Used With Dual Line Drivers  
2R  
2S  
NC  
2A  
2B  
1R  
1Y  
NC  
3A  
4
5
6
7
8
SN55121 and SN75121  
17  
16  
15  
• Interchangeable With Signetics N8T14  
14 3S  
9 10 11 12 13  
description  
The N8T14, SN55122, and SN75122 are triple  
line receivers that are designed for digital data  
transmission over lines having impedances from  
50 Ω to 500 Ω. They are also compatible with  
standard TTL-logic and supply voltage levels.  
NC–No internal connection  
THE N8T14 AND SN75122 ARE NOT  
RECOMMENDED FOR NEW DESIGN  
The N8T14, SN55122, and SN75122 have receiver inputs with built-in hysteresis to provide increased noise  
margin for single-ended systems. The high impedance of this input presents a minimum load to the driver and  
allows termination of the transmission line in its characteristic impedance to minimize line reflection. An open  
line will affect the receiver input as would a low-level voltage. The receiver can withstand a level of –0.15 V with  
power on or off. The other inputs are in TTL configuration. The S input must be high to enable the receiver input.  
Two of the line receivers have A and B inputs that, if both are high, will hold the output low. The third receiver  
has only an A input that, if high, will hold the output low.  
The SN55122 is characterized for operation over the full military temperature range of –55°C to 125°C. The  
N8T14 and SN75122 are characterized for operation from 0°C to 70°C.  
Copyright 1993, 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.  
2–1  
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567

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