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SN74AS640FN PDF预览

SN74AS640FN

更新时间： 2024-11-15 13:13:47
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
IC,BUS TRANSCEIVER,SINGLE,8-BIT,AS-TTL,LDCC,20PIN,PLASTIC

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SN74AS640FN 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
包装说明：QCCJ, LDCC20,.4SQReach Compliance Code：not_compliant
风险等级：5.92控制类型：COMMON CONTROL
计数方向：BIDIRECTIONALJESD-30 代码：S-PQCC-J20
位数：8功能数量：1
端子数量：20最高工作温度：70 °C
最低工作温度：输出特性：3-STATE
输出极性：INVERTED封装主体材料：PLASTIC/EPOXY
封装代码：QCCJ封装等效代码：LDCC20,.4SQ
封装形状：SQUARE封装形式：CHIP CARRIER
电源：5 V认证状态：Not Qualified
子类别：Bus Driver/Transceivers标称供电电压 (Vsup)：5 V
表面贴装：YES技术：TTL
温度等级：COMMERCIAL端子形式：J BEND
端子节距：1.27 mm端子位置：QUAD
Base Number Matches：1

SN74AS640FN 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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与SN74AS640FN相关器件

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 		IC,BUS TRANSCEIVER,SINGLE,8-BIT,AS-TTL,DIP,20PIN,PLASTIC
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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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 		OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SN74AS641 TI

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 		OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS
SN74AS641DW TI

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 		OCTAL BUS TRANSCEIVERS WITH OPEN-COLLECTOR OUTPUTS

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