SN74LS240DB datasheet(7/41 Pages) TI1

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VCC

Test

Point

From Output

Under Test

(see Note A)

High-Level

Pulse

Low-Level

Pulse

1.3 V

(see Note B)

VCC

From Output

Under Test

(see Note A)

Test

Point

5 k

Ω

(see Note B)

VCC

From Output

Under Test

(see Note A)

Test

Point

Time (ns)

-0.5

0.5

1.5

2.5

3.5

4.5

5.5

D001

Input

Output

SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244

SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244

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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

VCC = 5 V, TA = 25°C, CL = 45 pF, and RL = 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

SN74LS240DB 数据表(PDF) 7 Page - Texas Instruments

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