74LVQ541TTR datasheet(4/12 Pages) STMICROELECTRONICS

Il numero della parte	74LVQ541TTR

Spiegazioni elettronici	OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NO INVERTED)

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74LVQ541

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Table 8: AC Electrical Characteristics (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)

1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-

ing 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

Table 9: 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 x VCC x fIN + ICC/8 (per Gate)

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.

tPLH tPHL Propagation Delay

Time

2.7

6.6

11

12.5

14

ns

3.3(*)

5.8

9

10.5

12

tPZL tPZH Output Enable

Time

2.7

9.2

13.5

15

18

ns

3.3(*)

7.6

10

11.5

13

tPLZ tPHZ Output Disable

Time

2.7

9.0

12

13.5

15

ns

3.3(*)

7.3

9.0

10.5

12

tOSLH

tOSHL

Output To Output

Skew Time

(note1, 2)

2.7

0.5

1.0

ns

3.3(*)

0.5

1.0

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

3.3

4

pF

COUT

Output

Capacitance

3.3

8

pF

CPD

Power Dissipation

Capacitance

(note 1)

3.3

fIN = 10MHz

10

pF

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