74VHC14 datasheet(7/15 Pages) STMICROELECTRONICS

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74VHC14

Electrical characteristics

7/15

Table 6. AC electrical characteristics (Input tr = tf = 3ns)

Symbol

Parameter

Test condition

Value

Unit

VCC

(V)

(pF)

TA = 25°C

-40 to 85°C

-55 to

125°C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

tPLH

tPHL

Propagation delay

time

3.3(1)

8.3

12.8

1.0

15.0

1.0

15.0

3.3(1)

10.8

16.3

1.0

18.5

1.0

18.5

5.0(2)

5.5

8.6

1.0

10.0

1.0

10.0

5.0(2)

7.0

10.6

1.0

12.0

1.0

12.0

Voltage range is 3.3V ± 0.3V

Voltage range is 5.0V ± 0.5V

Table 7. Capacitive characteristics

Symbol

Parameter

Test condition

Value

Unit

TA = 25°C

-40 to 85°C

-55 to

125°C

Min.

Typ.

Max.

Min.

Max.

Min.

Max.

CIN

Input capacitance

CPD

Power dissipation

capacitance (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/6 (per gate)

Table 8. Dynamic switching characteristics

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 (1) (2)

5.0

CL = 50 pF

0.3

0.8

VOLV

-0.8

-0.3

VIHD

Dynamic high

voltage input (1) (3)

5.0

3.5

VILD

Dynamic low

voltage input (1) (3)

5.0

1.5

Worst case package.

Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching and one output at GND.

Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (VILD),

0V to threshold (VIHD), f = 1MHz.

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