74VHCT14A 查看數據表（PDF） - STMicroelectronics

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74VHCT14A

HEX SCHMITT inverter

STMicroelectronics 

74VHCT14A

Electrical characteristics

Table 7. AC electrical characteristics (Input tr = tf = 3ns)

Test condition

Value

Symbol

Parameter

VCC CL

(1)(V) (pF)

TA = 25°C

-40 to 85°C

-55 to

125°C

Unit

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

tPLH Propagation delay 5.0 15

tPHL time

5.0 50

5.5 7.6 1.0 8.5 1.0 9.5 ns

6.7 8.0 1.0 9.5 1.0 10.5

1. Voltage range is 5.0V ± 0.5V

Table 8. Capacitive characteristics

Test condition

Value

Symbol

Parameter

TA = 25°C

-40 to 85°C

-55 to

125°C

Unit

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

CIN Input capacitance

6 10

10

10 pF

CPD

Power dissipation

capacitance (1)

20

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/6 (per gate)

Table 9. Dynamic switching characteristics

Test condition

Value

Symbol

Parameter

VCC

(V)

TA = 25°C

-40 to 85°C

-55 to

125°C

Unit

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

VOLP Dynamic low

0.3 0.8

voltage quiet

5.0

V

VOLV output (1) (2)

-0.8 -0.3

VIHD

Dynamic high

voltage input (1) (3)

5.0

CL = 50 pF

2.0

V

VILD

Dynamic low

voltage input (1) (3) 5.0

0.6

V

1. Worst case package.

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

3. 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.

7/15

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