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SN54ALS243A

更新时间: 2024-09-15 23:06:11
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
5页 87K
描述
QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN54ALS243A 数据手册

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SN54ALS243A, SN74ALS243A  
QUADRUPLE BUS TRANSCEIVERS  
WITH 3-STATE OUTPUTS  
SDAS069B – DECEMBER 1982 – REVISED DECEMBER 1994  
SN54ALS243A . . . J PACKAGE  
SN74ALS243A . . . D OR N PACKAGE  
(TOP VIEW)  
Two-Way Asynchronous Communication  
Between Data Buses  
pnp Inputs Reduce dc Loading  
Package Options Include Plastic  
Small-Outline (D) Packages, Ceramic Chip  
Carriers (FK), and Standard Plastic (N) and  
Ceramic (J) 300-mil DIPs  
OEAB  
NC  
V
CC  
1
2
3
4
5
6
7
14  
13  
12  
11  
10  
9
OEBA  
NC  
B1  
B2  
B3  
A1  
A2  
A3  
A4  
description  
GND  
B4  
8
These quadruple bus transceivers are designed  
for asynchronous two-way communication  
between data buses. The control-function  
implementation allows for maximum flexibility in  
timing. 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 (OEBA and OEAB) inputs. The  
output-enable inputs can be used to disable the  
device so that the buses are effectively isolated.  
SN54ALS243A . . . FK PACKAGE  
(TOP VIEW)  
3
2
1
20 19  
18  
NC  
NC  
B1  
A1  
NC  
A2  
4
5
6
7
8
17  
16  
15  
14  
The dual-enable configuration gives the  
quadruple bus transceivers the capability to store  
data by simultaneously enabling OEBA and  
OEAB. Each output reinforces its input in this  
transceiver configuration. When both control  
inputs are enabled and all other data sources to  
the two sets of bus lines are at high impedance,  
both sets of bus lines (eight in all) retain their  
states. The 4-bit codes appearing on the two sets  
of buses are identical.  
NC  
B2  
NC  
A3  
9 10 11 12 13  
NC – No internal connection  
The SN54ALS243A is characterized for operation over the full military temperature range of 55°C to 125°C.  
The SN74ALS243A is characterized for operation from 0°C to 70°C.  
FUNCTION TABLE  
INPUTS  
FUNCTION  
OEBA  
OEAB  
L
H
H
L
H
L
A to B  
B to A  
Isolation  
Latch A and B  
(A = B)  
L
H
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.  
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265  

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