M74HC138 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

View to exact match

M74HC138

3 TO 8 LINE DECODER (INVERTING)

STMicroelectronics 

M54/M74HC138

AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)

Symbol

Parameter

Test Conditions

VCC

(V)

TA = 25 oC

54HC and 74HC

Value

-40 to 85 oC -55 to 125 oC Unit

74HC

54HC

Min. Typ. Max. Min. Max. Min. Max.

tTLH Output Transition 2.0

tTHL Time

4.5

30 75

8

15

95

110

19

22

ns

6.0

7

13

16

19

tPLH Propagation

2.0

tPHL Delay Time

4.5

(A, B, C - Y)

6.0

60 125

155

190

15 25

31

38

ns

13 21

26

32

tPLH Propagation

2.0

tPHL Delay Time

4.5

(G, G - Y)

6.0

56 120

150

180

14 24

30

36

ns

12 20

26

31

CIN Input Capacitance

5

10

10

10 pF

CPD (*) Power Dissipation

47

Capacitance

pF

(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.

(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC

SWITCHING CHARACTERISTICS TEST WAVEFORM

TEST CIRCUIT ICC (Opr.)

INPUT WAVEFORM IS THE SAME

AS THAT IN CASE OF SWITCHING

CHARACTERISTICS TEST.

5/10

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