74ACT244 datasheet(4/9 Pages) STMICROELECTRONICS

Teilenummer	74ACT244

Bauteilbeschribung	OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

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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)

CAPACITIVE CHARACTERISTICS

Symb ol

Parameter

Test Co nditi ons

Valu e

Un it

VCC

(V)

TA =25

oC

-40 to 85

oC

Min.

T yp.

Max.

Mi n.

Max.

CIN

Input Capacitance

5.0

4

pF

Ci/o

I/O Capacitance

5.0

8

pF

CPD

Power Dissipation

Capacitance (note 1)

5.0

24

pF

1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto

Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD

• VCC • fIN +ICC/n (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

oC

-40 to 85

oC

Min.

T yp.

Max.

Mi n.

Max.

tPLH

tPHL

Propagation Delay Time

5.0

(*)

1.5

4.5

9.0

1.5

10.0

ns

tPZL

tPZH

Output Enable Time

5.0

(*)

1.5

5.5

9.0

1.5

10.0

ns

tPLZ

tPHZ

Output Disable Time

5.0

(*)

1.5

6.5

10.0

1.5

11.0

ns

(*) Voltage range is 5V

± 0.5V

74ACT244

4/9

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Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
ON Semiconductor	74ACT244	117Kb / 9P	Octal Buffer/Line Driver with 3?뭆tate Outputs September, 2006 ??Rev. 7
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