74LVQ541(2004) データシートの表示（PDF） - STMicroelectronics

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74LVQ541
(Rev.:2004)

OCTAL BUS BUFFER WITH 3 STATE OUTPUTS (NON INVERTED)

STMicroelectronics 

74LVQ541

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

Test Condition

Symbol

Parameter

VCC

(V)

tPLH tPHL Propagation Delay

Time

tPZL tPZH Output Enable

Time

tPLZ tPHZ Output Disable

Time

tOSLH

tOSHL

Output To Output

Skew Time

(note1, 2)

2.7

3.3(*)

2.7

3.3(*)

2.7

3.3(*)

2.7

3.3(*)

Value

TA = 25°C

-40 to 85°C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

6.6 11

5.8 9

12.5

10.5

14

ns

12

9.2 13.5

15

7.6 10

11.5

18

ns

13

9.0 12

7.3 9.0

0.5 1.0

0.5 1.0

13.5

10.5

1.0

1.0

15

ns

12

1.0

1.0 ns

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

Symbol

Parameter

CIN

COUT

CPD

Input Capacitance

Output

Capacitance

Power Dissipation

Capacitance

(note 1)

Test Condition

VCC

(V)

3.3

3.3

3.3

fIN = 10MHz

Value

TA = 25°C

-40 to 85°C -55 to 125°C Unit

Min. Typ. Max. Min. Max. Min. Max.

4

pF

8

pF

10

pF

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)

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