74LVQ157TTR datasheet(4/12 Pages) STMICROELECTRONICS

Numer części	74LVQ157TTR

Szczegółowy opis	LOW VOLTAGE QUAD 2 CHANNEL MULTIPLEXER

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74LVQ157

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Table 7: Dynamic Switching Characteristics

1) Worst case package.

2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND.

3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (VILD), 0V to threshold

(VIHD), f=1MHz.

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/4 (per

channel)

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.

VOLP

Dynamic Low

Voltage Quiet

Output (note 1, 2)

3.3

CL = 50 pF

0.2

0.8

V

VOLV

-0.8

-0.2

VIHD

Dynamic High

Voltage Input

(note 1, 3)

3.3

2

V

VILD

Dynamic Low

Voltage Input

(note 1, 3)

3.3

0.8

V

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 SELECT -Y

2.7

8.4

13.5

15.5

17.5

ns

3.3(*)

7.0

10.0

11.5

13.0

tPLH tPHL Propagation Delay

Time STROBE -Y

2.7

7.6

12.0

14.0

16.0

ns

3.3(*)

7.0

10.0

11.5

13.0

tPLH tPHL Propagation Delay

Time A, B -Y

2.7

6.8

10.5

12.0

13.5

ns

3.3(*)

5.5

8.0

9.0

10

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

5

pF

CPD

Power Dissipation

Capacitance

(note 1)

3.3

fIN = 10MHz

32

pF

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