M54HC4028 datasheet(5/10 Pages) STMICROELECTRONICS

tên linh kiện	M54HC4028

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

Symbol

Parameter

Test Conditions

Value

Unit

VCC

(V)

TA =25

54HC and 74HC

-40 to 85

74HC

-55 to 125

54HC

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

tTLH

tTHL

Output Transition

Time

2.0

110

4.5

151922

6.0

131619

tPLH

tPHL

Propagation

Delay Time

2.0

185

230

280

4.5

6.0

CIN

Input Capacitance

CPD (*)

Power Dissipation

Capacitance

(*) 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 TRANSITION TIME IS THE SAME AS THAT IN CASE OF

SWITCHING CHARACTERISTICS TEST.

M54/ M74HC4028

5/10

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