Datasheet
Driver
1/8 'LS241/'S241
Repeater
1/8 'LS241/'S241
Input
2.9 V
C
L
Long-Line
1.6 V
1.2 V
0.3 V
Input
Output
Input
Output
Input
Output
Input
Output
Input
Output
Repeater
1/8 'LS241/'S241
Repeater
1/8 'LS241/'S241
Receiver
1/8 'LS241/'S241
Output
Copyright © 2016, Texas Instruments Incorporated
14
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
Submit Documentation Feedback Copyright © 1985–2016, Texas Instruments Incorporated
9 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
The SNx4LS24x, SNx4S24x octal buffers and line drivers are designed to be used for a multitude of bus
interface type applications where output drive or PCB trace length is a concern.
9.2 Typical Application
Figure 22. SNx4LS241 and SNx4S241 Used as Repeater or Level Restorer
9.2.1 Design Requirements
This device uses Schottky transistor logic technology. Take care to avoid bus contention because it can drive
currents that would exceed maximum limits. The high drive creates fast edges into light loads, so routing and
load conditions must be considered to prevent ringing.
9.2.2 Detailed Design Procedure
• Power Supply
– Each device must maintain a supply voltage between 4.5 V and 5.5 V.
• Inputs
– Input signals must meet the V
IH
and V
IL
specifications in Electrical Characteristics – SNx4LS24x.
– Inputs leakage values (I
I
, I
IH
, I
IL
) from Electrical Characteristics – SNx4LS24x must be considered.
• Outputs
– Output signals are specified to meet the V
OH
and V
OL
specifications in Electrical Characteristics –
SNx4LS24x as a minimum (the values could be closer to V
CC
for high signals or GND for low signals).
– TI recommends maintaining output currents as specified in Recommended Operating Conditions.
– The part can be damaged by sourcing or sinking too much current (see Electrical Characteristics –
SNx4LS24x for details).