74HCT240D,74HCT244D

5

11.4. AC Characteristics (Unless otherwise specified, Ta = 25 �, Input: tr = tf = 6 ns)

Characteristics

Output transition time

Propagation delay time

Propagation delay time

3-state output enable time

3-state output disable time

Input capacitance

Output capacitance

Power dissipation

capacitance

Part Number

74HCT240D

74HCT244D

74HCT240D

74HCT244D

Symbol

tTLH,tTHL

tPLH,tPHL

tPLH,tPHL

tPZL,tPZH

tPLZ,tPHZ

CIN

COUT

CPD

CPD

Note

(Note 1)

Test

Condition

�

�

�

RL = 1 kΩ

RL = 1 kΩ

�

�

�

�

CL (pF)

50

50

150

50

150

50

150

50

VCC (V)

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

Min

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

Typ.

7

6

15

13

21

16

15

13

21

18

17

14

23

20

16

13

5

10

33

31

Max

12

11

22

20

30

27

25

22

33

29

30

27

38

34

30

27

10

�

�

�

Unit

ns

ns

ns

ns

ns

pF

pF

pF

Note 1: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current

consumption without load. Average operating current can be obtained by the equation.

ICC(opr) = CPD × VCC × fIN + ICC/8 (per bit)

11.5. AC Characteristics

(Unless otherwise specified, Ta = -40 to 85 �, Input: tr = tf = 6 ns)

Characteristics

Output transition time

Propagation delay time

Propagation delay time

3-state output enable time

3-state output disable time

Input capacitance

Part Number

74HCT240D

74HCT244D

Symbol

tTLH,tTHL

tPLH,tPHL

tPLH,tPHL

tPZL,tPZH

tPLZ,tPHZ

CIN

Test

Condition

�

�

�

RL = 1 kΩ

RL = 1 kΩ

�

CL (pF)

50

50

150

50

150

50

150

50

VCC (V)

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

4.5

5.5

Min

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

�

Max

15

14

28

25

38

34

31

28

41

37

38

34

48

43

38

34

10

Unit

ns

ns

ns

ns

ns

pF

2020-11-17

Rev.3.0

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Toshiba Electronic Devices & Storage Corporation