74LVQ244M datasheet(4/8 Pages) STMICROELECTRONICS

部品番号	74LVQ244M

部品情報	LOW VOLTAGE OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON-INVERTED

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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

3.3

5

pF

COUT

Output Capacitance

3.3

10

pF

CPD

Power Dissipation

Capacitance (note 1)

3.3

fIN =10 MHz

15

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 operting current can be obtained by the following equation. ICC(opr) = CPD

• VCC • fIN +ICC/8(per circuit)

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)

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

2.7

7

13

14

ns

3.3

(*)

69

9.5

tPZL

tPZH

Output Enable Time

2.7

8.5

17

18

ns

3.3

(*)

7

12

12.5

tPLZ

tPHZ

Output Disable Time

2.7

9

19

20

ns

3.3

(*)

7.5

13.5

14

tOSLH

tOSHL

Output to Output Skew

Time (note 1, 2)

2.7

0.5

1.5

ns

3.3

(*)

0.5

1.5

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any twooutputs of the same device switching in the

same direction, either HIGH or LOW (tOSLH =|tPLHm -tPLHn|, tOSHL =|tPHLm -tpHLn|)

2) Parameter guaranteed by design

(*) Voltage range is 3.3V

± 0.3V

74LVQ244

4/8

同様の部品番号 - 74LVQ244M

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