74AHC_AHCT240

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Product data sheet

Rev. 2 — 26 November 2010

6 of 16

NXP Semiconductors

74AHC240; 74AHCT240

Octal buffer/line driver; inverting; 3-state

10. Dynamic characteristics

Table 7.

Dynamic characteristics

Voltages are referenced to GND (ground = 0 V); for test circuit see Figure 7.

Symbol Parameter

Conditions

25

C

40 C to +125 C

Unit

Min

Typ[1]

Max

Min

Max

(85

C)

Max

(125

C)

74AHC240

propagation delay

nAn to nYn; see Figure 5

[2]

-

3.9

7.5

1.0

8.6

10.8

ns

-

5.8

11.0

1.0

12.5

15.6

ns

-

2.8

4.8

1.0

5.7

7.1

ns

-

4.2

7.3

1.0

8.5

10.6

ns

enable time

nOE to nYn; see Figure 6

[2]

-

4.4

10.0

1.0

12.0

19.4

ns

-

5.8

13.5

1.0

15.5

19.4

ns

-

3.1

6.5

1.0

7.7

12.5

ns

-

4.1

8.5

1.0

10.0

12.5

ns

disable time

nOE to nYn; see Figure 6

[2]

-

5.3

9.0

1.0

10.0

18.1

ns

-

8.9

13.0

1.0

14.5

18.1

ns

-

3.9

5.8

1.0

6.5

8.1

ns

-

6.2

8.7

1.0

9.5

11.8

ns

power dissipation

capacitance

[3]

-9

-

-

-

-

pF