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SN74BCT620A PDF预览

SN74BCT620A

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
5页 81K
描述
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN74BCT620A 数据手册

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SN54BCT620A, SN74BCT620A  
OCTAL BUS TRANSCEIVERS  
WITH 3-STATE OUTPUTS  
SCBS001B – SEPTEMBER 1987 – REVISED NOVEMBER 1993  
SN54BCT620A . . . J OR W PACKAGE  
SN74BCT620A . . . DW OR N PACKAGE  
(TOP VIEW)  
State-of-the-Art BiCMOS Design  
Significantly Reduces I  
CCZ  
P-N-P Inputs Reduce DC Loading  
ESD Protection Exceeds 2000 V  
OEAB  
A1  
V
CC  
OEBA  
1
2
3
4
5
6
7
8
9
20  
19  
18  
17  
16  
15  
14  
13  
12  
Per MIL-STD-883C, Method 3015  
Package Options Include Plastic  
A2  
A3  
A4  
A5  
A6  
A7  
A8  
B1  
B2  
B3  
B4  
B5  
B6  
B7  
Small-Outline (DW) Packages, Ceramic  
Chip Carriers (FK) and Flatpacks (W), and  
Plastic and Ceramic 300-mil DIPs (J, N)  
description  
The BCT620A bus transceiver is designed for  
asynchronous communication between data  
buses. Thecontrolfunctionimplementationallows  
for maximum flexibility in timing. The BCT620A  
provides inverted data at its outputs.  
GND 10  
11 B8  
SN54BCT620A . . . FK PACKAGE  
(TOP VIEW)  
These devices allow data transmission from the A  
bus to the B bus or from the B bus to the A bus  
depending upon the logic levels at the  
output-enable (OEAB and OEBA) inputs.  
3
2
1
20 19  
18  
B1  
17 B2  
A3  
A4  
A5  
A6  
A7  
4
5
6
7
8
The output-enable inputs can be used to disable  
the device so that the buses are effectively  
isolated. The dual-enable configuration gives the  
transceivers the capability of storing data by  
simultaneously enabling OEAB and OEBA. When  
both OEAB and OEBA are enabled and all other  
datasourcestothetwosetsofbuslinesareathigh  
impedance, both sets of bus lines (16 in all) will  
remain at their last states. In this way, each output  
reinforces its input in this configuration.  
16  
15  
14  
B3  
B4  
B5  
9 10 11 12 13  
The SN54BCT620A is characterized for operation  
over the full military temperature range of 55°C  
to 125°C. The SN74BCT620A is characterized for  
operation from 0°C to 70°C.  
FUNCTION TABLE  
INPUTS  
OPERATION  
OEBA  
OEAB  
L
L
B data to A bus  
B data to A bus,  
A data to B bus  
L
H
H
H
L
Isolation  
H
A data to B bus  
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  

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