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SN74BCT640 PDF预览

SN74BCT640

更新时间: 2024-10-30 22:53:35
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
12页 475K
描述
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN74BCT640 数据手册

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SN54BCT640, SN74BCT640  
OCTAL BUS TRANSCEIVERS  
WITH 3-STATE OUTPUTS  
SCBS025C – SEPTEMBER 1988 – REVISED APRIL 1994  
SN54BCT640 . . . J OR W PACKAGE  
SN74BCT640 . . . DW OR N PACKAGE  
(TOP VIEW)  
State-of-the-Art BiCMOS Design  
Substantially Reduces Standby Current  
Outputs Have Undershoot-Protection  
Circuitry  
DIR  
A1  
V
CC  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
Power-Up High-Impedance State  
OE  
B1  
B2  
A2  
A3  
Buffered Control Inputs to Reduce DC  
Loading Effects  
A4  
A5  
16 B3  
15 B4  
ESD Protection Exceeds 2000 V  
Per MIL-STD-883C, Method 3015  
14  
13  
12  
11  
A6  
A7  
A8  
GND  
B5  
B6  
B7  
B8  
Package Options Include Plastic  
Small-Outline (DW) Packages, Ceramic  
Chip Carriers (FK) and Flatpacks (W), and  
Plastic and Ceramic 300-mil DIPs (J, N)  
SN54BCT640 . . . FK PACKAGE  
(TOP VIEW)  
description  
The BCT640 bus transceiver is designed for  
asynchronous 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.  
3
2
1
20 19  
18  
A3  
A4  
A5  
A6  
A7  
B1  
17 B2  
4
5
6
7
8
16  
15  
14  
B3  
B4  
B5  
9 10 11 12 13  
The SN54BCT640 is characterized for operation  
over the full military temperature range of 55°C  
to 125°C. The SN74BCT640 is characterized for  
operation from 0°C to 70°C.  
FUNCTION TABLE  
INPUTS  
OPERATION  
OE  
DIR  
L
L
L
B data to A bus  
A data to B bus  
Isolation  
H
H
X
Copyright 1994, 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  

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