Datasheet

V
CC
R
L
Test
Point
From Output
Under Test
C
L
(see Note A)
High-Level
Pulse
Low-Level
Pulse
1.3 V 1.3 V
1.3 V 1.3 V
t
w
(see Note B)
V
CC
R
L
From Output
Under Test
C
L
(see Note A)
Test
Point
5 kΩ
S1
S2
(see Note B)
V
CC
R
L
From Output
Under Test
C
L
(see Note A)
Test
Point
Time (ns)
Voltage (V)
0 5 10 15 20
-0.5
0.5
1.5
2.5
3.5
4.5
5.5
D001
Input
Output
7
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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6.9 Typical Characteristics
V
CC
= 5 V, T
A
= 25°C, C
L
= 45 pF, and R
L
= 667 Ω (unless otherwise noted)
Figure 1. Simulated Propagation Delay From Input to Output
7 Parameter Measurement Information
7.1 SN54LS24x and SN74LS24x Devices
Figure 2. Load Circuit,
For 2-State Totem-Pole Outputs
Figure 3. Load Circuit,
For Open-Collector Outputs
Figure 4. Load Circuit,
For 3-State Outputs
Figure 5. Voltage Waveforms,
Pulse Durations