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SN75138 PDF预览

SN75138

更新时间: 2024-11-24 22:53:35
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德州仪器 - TI 总线收发器
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13页 245K
描述
QUADRUPLE BUS TRANSCEIVERS

SN75138 数据手册

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SN55138, SN75138  
QUADRUPLE BUS TRANSCEIVERS  
SLLS079B – SEPTEMBER 1973 – REVISED MAY 1995  
SN55138 . . . J OR W PACKAGE  
SN75138 . . . D OR N PACKAGE  
Single 5-V Supply  
High-Input-Impedance, High-Threshold  
Receivers  
(TOP VIEW)  
Common Driver Strobe  
1
2
3
4
5
6
7
8
16  
V
CC  
15 4B  
GND  
1B  
TTL-Compatible Driver and Strobe Inputs  
With Clamp Diodes  
14  
13  
12  
11  
10  
9
4R  
4D  
S
1R  
1D  
High-Speed Operation  
2D  
100-mA Open-Collector Driver Outputs  
Four Independent Channels  
TTL-Compatible Receiver Output  
3D  
3R  
3B  
2R  
2B  
GND  
description  
SN55138 . . . FK PACKAGE  
(TOP VIEW)  
The SN55138 and SN75138 quadruple bus  
transceivers are designed for two-way data  
communication over single-ended transmission  
lines. Each of the four identical channels consists  
of a driver with TTL inputs and a receiver with a  
TTL output. The driver open-collector output is  
designed to handle loads up to 100-mA open  
collector. The receiver input is internally  
connected to the driver output, and has a high  
impedance to minimize loading of the  
transmission line. Because of the high driver-  
output current and the high receiver-input  
impedance, a very large number (typically  
hundreds) of transceivers may be connected to a  
single data bus.  
3
2
1
20 19  
18  
4R  
4D  
NC  
S
1R  
1D  
NC  
2D  
2R  
4
5
6
7
8
17  
16  
15  
14  
3D  
9 10 11 12 13  
NC – No internal connection  
The receiver design also features a threshold of 2.3 V (typical), providing a wider noise margin than would be  
possible with a receiver having the usual TTL threshold. A strobe turns off all drivers (high impedance) but does  
not affect receiver operation. These circuits are designed for operation from a single 5-V supply and include a  
provision to minimize loading of the data bus when the power-supply voltage is zero.  
The SN55138 is characterized for operation over the full military temperature range of 55°C to 125°C. The  
SN75138 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 1995, 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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型号 品牌 替代类型 描述 数据表
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