Datasheet

Input A
To Other
Buffers
Output A
Bus
Control
H
H
L
L
H
H
L
L
H
L
Receivers
Input
Output
Bus
Control
B
B
A
A
None
1/4 'LS241/'S241
Driver
Party-Line
Multiple-Input/Output Bus
1/4 'LS241/'S241
Driver
Input B
To Other
Buffers
Output B
A
B
B
A
None
L
H
H
L
L
L
L
H
H
H
Copyright © 2016, Texas Instruments Incorporated
'LS240/'S240
Output
Ports
Input
Ports
From
Data
Bus
From
Data
Bus
G
Output-Port
Control
Input-Port
Control
G
Copyright © 2016, Texas Instruments Incorporated
16
SN54LS240 , SN54LS241 , SN54LS244 , SN54S240 , SN54S241 , SN54S244
SN74LS240 , SN74LS241 , SN74LS244 , SN74S240 , SN74S241 , SN74S244
SDLS144D –APRIL 1985–REVISED OCTOBER 2016 www.ti.com
Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240
SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244
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System Examples (continued)
Figure 25. Independent 4-Bit But Drivers/Receivers in a Single Package
The enable pins on the SNx4LS241 and SNx4S241 devices can be used to help direct signals along a shared
party-line bus. Figure 26 shows a general configuration of how to implement this structure. Take care to ensure
that bus contention does not occur.
Figure 26. Party-Line Bus System With Multiple Inputs, Outputs, and Receivers