74AC541B datasheet(4/8 Pages) STMICROELECTRONICS

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CAPACITIVE CHARACTERISTICS

Symbo l

Parameter

Test Con dition s

Value

Uni t

VCC

(V)

T A =25

-40 to 85

Mi n.

T yp.

Max.

Min.

Max.

CIN

Input Capacitance

5.0

COUT

Output Capacitance

5.0

CPD

Power Dissipation

Capacitance (note 1)

5.0

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

• VCC • fIN +ICC/8 (per circuit)

AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500

Ω, Input tr =tf =3 ns)

Symb ol

Parameter

T est Con ditio n

Valu e

Un it

VCC

(V)

TA =25

-40 to 85

Min.

T yp.

Max.

Mi n.

Max.

tPLH

tPHL

Propagation Delay Time

3.3

(*)

1.5

5.0

(**)

1.546.5

1.5

tPZL

tPZH

Output Enable Time

3.3

(*)

1.5

10.5

1.5

11.5

5.0

(**)

1.5

8.5

tPLZ

tPHZ

Output Disable Time

3.3

(*)

1.5

10.5

1.5

11.5

5.0

(**)

1.5

9.5

(*) Voltage range is 3.3V

± 0.3V

(**) Voltage range is 5V

± 0.5V

TEST CIRCUIT

T EST

SW IT CH

tPLH,tPHL

Open

tPZL,tPLZ

2VCC

tPZH,tPHZ

Open

CL = 50 pF or equivalent (includes jigand probe capacitance)

RL =R1 =500

Ω orequivalent

RT =ZOUT of pulse generator (typically 50

Ω)

74AC541

4/8

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