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SN74AS640N PDF预览

SN74AS640N

更新时间： 2024-11-14 23:03:11
品牌 Logo 应用领域
德州仪器 - TI 总线收发器输出元件
页数 文件大小 规格书
7页 115K
描述
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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SN74AS640N 数据手册

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SN54ALS640B, SN54AS640, SN74ALS640B, SN74AS640  
OCTAL BUS TRANSCEIVERS  
WITH 3-STATE OUTPUTS  
SDAS122A – DECEMBER 1983 – REVISED JANUARY 1995  
SN54ALS640B, SN54AS640 . . . J PACKAGE  
SN74ALS640B, SN74AS640 . . . DW OR N PACKAGE  
(TOP VIEW)  
• Bidirectional Bus Transceivers in  
High-Density 20-Pin Packages  
• Inverting Logic  
• Package Options Include Plastic  
Small-Outline (DW) Packages, Ceramic  
Chip Carriers (FK), and Standard Plastic (N)  
and Ceramic (J) 300-mil DIPs  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
DIR  
A1  
A2  
A3  
A4  
A5  
A6  
A7  
A8  
V
CC  
OE  
B1  
B2  
B3  
B4  
B5  
B6  
B7  
B8  
description  
These octal bus transceivers are designed for  
asynchronous two-way communication between  
data buses. These devices transmit data from the  
A bus to the B bus or from the B bus to the A bus,  
depending upon the level at the direction-control  
(DIR) input. The output-enable (OE) input can be  
used to disable the device so that the buses are  
effectively isolated.  
GND  
SN54ALS640B, SN54AS640 . . . FK PACKAGE  
(TOP VIEW)  
The -1 version of the SN74ALS640B is identical to  
the standard version, except that the  
3
2
1
20 19  
18  
B1  
B2  
B3  
B4  
B5  
A3  
A4  
A5  
A6  
A7  
4
5
6
7
8
recommended maximum I for the -1 version is  
OL  
17  
16  
15  
14  
increased to 48 mA. There is no -1 version of the  
SN54ALS640B.  
The SN54ALS640B and SN54AS640 are  
characterized for operation over the full military  
temperature range of –55°C to 125°C. The  
9 10 11 12 13  
SN74ALS640B  
and  
SN74AS640  
are  
characterized for operation from 0°C to 70°C.  
FUNCTION TABLE  
INPUTS  
OPERATION  
OE  
L
DIR  
L
B data to A bus  
A data to B bus  
Isolation  
L
H
H
X
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  
1234567

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SN74AS640N 替代型号

型号 品牌 替代类型 描述 数据表
SN74AS645N TI

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 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SN74AS641N TI

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SN74AS641DW TI

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 OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS

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SN74AS640N1 TI

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 		OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SN74AS640NSRE4 TI

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 		OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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SN74AS641 TI

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SN74AS641DW TI

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 		OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS
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