M54HC158D datasheet(5/10 Pages) STMICROELECTRONICS

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M54HC158

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Table 6: AC Electrical Characteristics (CL = 50 pF, Input tr =tf = 6ns)

Table 7: Capacitive Characteristics

1) 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 operating current can be obtained by the following equation. ICC(opr) =CPD xVCC xfIN +ICC/4(per chan-

nel)

Figure 4: Test Circuit

CL = 50pF or equivalent (includes jig and probe capacitance)

RT =ZOUT of pulse generator (typically 50Ω)

Symbol

Parameter

Test Condition

Value

Unit

VCC

(V)

TA = 25°C

-40 to 85°C

-55 to 125°C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

tTLH tTHL Output Transition

Time

2.0

110

4.5

6.0

tPLH tPHL Propagation Delay

Time (A, B - Y)

2.0

100

125

150

4.5

6.0

tPLH tPHL Propagation Delay

Time (SELECT - Y)

2.0

125

155

190

4.5

6.0

tPLH tPHL Propagation Delay

Time (STROBE -Y)

2.0

115

145

175

4.5

6.0

Symbol

Parameter

Test Condition

Value

Unit

VCC

(V)

TA = 25°C

-40 to 85°C

-55 to 125°C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

CIN

Input Capacitance

5.0

CPD

Power Dissipation

Capacitance (note

5.0

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