74LVC240AD データシートの表示（PDF） - Philips Electronics

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74LVC240AD

Octal buffer/line driver with 5 V tolerant inputs/outputs; inverting(3-state)

Philips Electronics 

Philips Semiconductors

Octal buffer/line driver with 5 V tolerant

inputs/outputs; inverting (3-state)

Product specification

74LVC240A

AC CHARACTERISTICS

GND = 0 V; tr = tf ≤ 2.5 ns; CL = 50 pF; RL = 500 Ω.

CONDITIONS

SYMBOL

PARAMETER

WAVEFORMS VCC (V)

tPLH/tPHL

tPZH/tPZL

tPHZ/tPLZ

propagation delay:

1An to 1Yn; 2An to 2Yn

3-state output enable time:

1OE to 1Yn; 2OE to 2Yn

3-state output disable time:

1OE to 1Yn; 2OE to 2Yn

see Figs 5 and 7

see Figs 6 and 7

see Figs 6 and 7

1.2

2.7

3.0 to 3.6

1.2

2.7

3.0 to 3.6

1.2

2.7

3.0 to 3.6

Tamb (°C)

−40 to +85

MIN. TYP. MAX.

−

16.0

−

1.5

−

7.5

1.5

3.5(1)

6.5

−

19.0

−

1.5

−

9.0

1.5

4.3(1)

8.0

−

17.0

−

1.5

−

8.0

1.5

3.7(1)

7.0

UNIT

ns

ns

ns

ns

ns

ns

ns

ns

ns

Note:

1. This typical value is measured at VCC = 3.3 V and Tamb = 25 °C.

AC WAVEFORMS

handbook, haVlfpIage

inputs

GND

VOH

outputs

VOL

VM

tPHL

VM

VM

tPLH

VM

MGU781

VM = 1.5 V at VCC ≥ 2.7 V; VM = 0.5VCC at VCC < 2.7 V.

VOL and VOH are typical output voltage drop that occur with the output load.

Fig.5 Inputs (1An, 2An) to outputs (1Yn, 2Yn) propagation delays.

2002 Oct 02

7

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