Datasheet

Req
V
CC
Input
Copyright © 2016, Texas Instruments Incorporated
R
V
CC
Output
GND
Copyright © 2016, Texas Instruments Incorporated
9 kΩ NOM
Input
V
CC
Copyright © 2016, Texas Instruments Incorporated
13
SN54LS240 , SN54LS241 , SN54LS244 , SN54S240 , SN54S241 , SN54S244
SN74LS240 , SN74LS241 , SN74LS244 , SN74S240 , SN74S241 , SN74S244
www.ti.com SDLS144D –APRIL 1985–REVISED OCTOBER 2016
Product Folder Links: SN54LS240 SN54LS241 SN54LS244 SN54S240 SN54S241 SN54S244 SN74LS240
SN74LS241 SN74LS244 SN74S240 SN74S241 SN74S244
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Table 2. SNx4LS241 and SNx4S241
Function Table
CHANNEL 1 CHANNEL 2
INPUTS OUTPUT INPUTS OUTPUT
1G 1A 1Y 2G 2A 2Y
L L L H L L
L H H H H H
H X Z L X Z
Table 3. SNx4LS244 and SNx4S244
Function Table
INPUTS OUTPUTS
G A Y
L L L
L H H
H X Z
Figure 19. SNx4LS240, SNx4LS241, SNx4LS244
Equivalent of Each Input
G and G inputs: R
eq
= 2 kΩ NOM
A inputs: R
eq
= 2.8 kΩ NOM
Figure 20. SNx4S240, SNx4S241, SNx4S244
Equivalent of Each Input
SNx4LS240, SNx4LS241, SNx4LS244:
R = 50 Ω NOM
SNx4S240, SNx4S241, SNx4S244:
R = 25 Ω NOM
Figure 21. Typical of All Outputs