M74HCT138(1993) 데이터 시트보기 (PDF) - STMicroelectronics

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M74HCT138
(Rev.:1993)

3 TO 8 LINE DECODER (INVERTING)

STMicroelectronics 

M54/M74HCT138

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 4.5

tTHL Time

8

15

19

22

ns

tPLH Propagation

4.5

tPHL Delay Time

(A, B, C - Y)

17 30

38

45

ns

tPLH Propagation

4.5

tPHL Delay Time

(G1 - Y)

16 30

38

45

ns

tPLH Propagation

4.5

tPHL Delay Time

(G2 - Y)

19 30

38

45

ns

CIN Input Capacitance

5

10

10

10 pF

CPD (*) Power Dissipation

52

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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