MC74HCT244A

http://onsemi.com

3

Symbol

Parameter

Guaranteed Limit

Unit

– 55 to 25

_C

v 85_C

v 125_C

Maximum Propagation Delay, A to YA or B to YB

(Figures 1 and 3)

20

25

30

ns

Maximum Propagation Delay, Output Enable to YA or YB

(Figures 2 and 4)

26

33

39

ns

Maximum Propagation Delay, Output Enable to YA or YB

(Figures 2 and 4)

22

28

33

ns

Maximum Output Transition Time, Any Output

(Figures 1 and 3)

12

15

18

ns

Maximum Input Capacitance

10

10

10

pF

Maximum Three−State Output Capacitance

(Output in High−Impedance State)

15

15

15

pF

NOTE: For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the ON

Semiconductor High−Speed CMOS Data Book (DL129/D).

Power Dissipation Capacitance (Per Enabled Output)*

Typical @ 25

pF

55

ON Semiconductor High−Speed CMOS Data Book (DL129/D).

SWITCHING WAVEFORMS

Figure 2.

Figure 3.

3 V

GND

INPUT

A OR B

OUTPUT

YA OR YB

0.3 V

1.3 V

2.7 V

10%

1.3 V

90%

ENABLE

A OR B

OUTPUT Y

OUTPUT Y

1.3 V

1.3 V

1.3 V

90%

10%

3 V

GND

HIGH

IMPEDANCE

HIGH

IMPEDANCE