74HC_HCT238

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© NXP Semiconductors N.V. 2016. All rights reserved.

Product data sheet

Rev. 4 — 27 January 2016

8 of 19

NXP Semiconductors

74HC238; 74HCT238

3-to-8 line decoder/demultiplexer

10. Dynamic characteristics

Table 7.

Dynamic characteristics

GND = 0 V; test circuit see Figure 8.

Symbol Parameter

Conditions

25

C

40 C to +125 C

Min

Typ

Max

Max

(85

C)

Max

(125

C)

Unit

74HC238

tpd

propagation delay

An to Yn; see Figure 6

[1]

VCC = 2.0 V

-

47

150

190

225

ns

VCC = 4.5 V

-

17

30

38

45

ns

VCC = 5.0 V; CL =15pF

-

14

-

-

-

ns

VCC = 6.0 V

-

14

26

33

38

ns

E3 to Yn; see Figure 6

[1]

VCC = 2.0 V

-

52

160

200

240

ns

VCC = 4.5 V

-

19

32

40

48

ns

VCC = 5.0 V; CL =15pF

-

16

-

-

-

ns

VCC = 6.0 V

-

15

27

34

41

ns

En to Yn or see Figure 7

[1]

VCC = 2.0 V

-

50

155

195

235

ns

VCC = 4.5 V

-

18

31

39

47

ns

VCC = 5.0 V; CL =15pF

-

17

-

-

-

ns

VCC = 6.0 V

-

14

26

33

40

ns

tt

transition time

see Figure 6 and Figure 7

[2]

VCC = 2.0 V

-

19

75

95

110

ns

VCC = 4.5 V

-

7

15

19

22

ns

VCC = 6.0 V

-

6

13

16

19

ns

CPD

power dissipation

capacitance

per package; VI =GND to VCC

[3]

-72-

-

-

pF