74AC14B datasheet(4/7 Pages) STMICROELECTRONICS

部件名	74AC14B

功能描述	HEX SCHMITT INVERTER

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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CAPACITIVE CHARACTERISTICS

Symbol

Parameter

Test Con dition s

Value

Unit

VCC

(V)

TA =25

oC-40 to 85 oC

Mi n.

Typ.

Max.

Min .

Max.

CIN

Input Capacitance

5.0

4

pF

CPD

Power Dissipation

Capacitance (note 1)

5.0

35

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

• VCC • fIN +ICC/n (per circuit)

TEST CIRCUIT

CL = 50 pF or equivalent (includes jig and probe capacitance)

RL =R1 = 500

Ω or equivalent

RT =ZOUT of pulse generator (typically 50

Ω)

WAVEFORM: PROPAGATION DELAYS (f=1MHz)

74AC14

4/7

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