5.5 Switching Characteristics

Input tt= 6ns. Unless otherwise specified, CL = 50pF

(2)

PARAMETER

VCC (V)

25°C

-40°C to 85°C

-55°C to 125°C

UNIT

MIN

TYP

MAX

MIN

MAX

MIN

MAX

HC TYPES

tpd

Propagation delay data to

output

2

110

140

165

ns

4.5

22

28

33

6

19

24

28

tdis

Output disable to output

2

150

190

225

ns

4.5

30

38

45

6

26

33

38

ten

Output enable to output

2

150

190

225

ns

4.5

30

38

45

6

26

33

38

tt

Output transition time

2

60

75

90

ns

4.5

12

15

18

6

10

13

15

Ci

Input capacitance

10

10

10

10

pF

Cio

Three-state output capacitance

20

20

20

pF

Cpd

Power dissipation capacitance

5

53

pF

HCT TYPES

tpd

Data to output

4.5

26

33

39

ns

tdis

Output disable to output

4.5

30

38

45

ns

ten

Output enable to output

4.5

32

40

48

ns

tt

Output transition time

4.5

12

15

18

ns

Ci

Input capacitance

10

10

10

10

pF

Cio

Three-state output capacitance

20

20

20

pF

Cpd

Power dissipation

capacitance(1) (2)

5

55

pF

(1)

CPD is used to determine the dynamic power consumption, per channel.

(2)

PD = VCC 2 fi (CPD + CL) where fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.

CD54HC245, CD74HC245, CD54HCT245, CD74HCT245

SCHS119B – NOVEMBER 1998 – REVISED JULY 2022

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