74AC74B datasheet(5/11 Pages) STMICROELECTRONICS

номер детали	74AC74B

подробное описание детали	DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR

PDF	11 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	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

CPD

Power Dissipation

Capacitance (note 1)

5.0

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)

AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500

Ω, Input tr =tf =3 ns)

Symbol

Parameter

T est Cond iti on

Value

Unit

VCC

(V)

TA =25

oC-40 to 85 oC

Mi n.

Typ.

Max.

Min .

Max.

tPLH

tPHL

Propagation Delay Time

CK to Q

3.3

(*)

713

5.0

(**)

510

tPLH

tPHL

Propagation Delay Time

PR or CLR to Q

3.3

(*)

612

5.0

(**)

4.5

Pulse Width HIGH or

LOW, CK or PR or CLR

3.3

(*)

1.5

5.0

(**)

1.5

Setup Time D to CK

HIGH or LOW

3.3

(*)

-0.2

5.0

(**)

-0.2

Hold Time D to CK

HIGH or LOW

3.3

(*)

0.2

5.0

(**)

0.2

tREM

Removal Time

PR or CLR to CK

3.3

(*)

-1

5.0

(**)

-0.7

fMAX

Maximum Clock

Frequency

3.3

(*)

100

300

MHz

5.0

(**)

140

300

130

(*) Voltage range is 3.3V

± 0.3V

(**) Voltage range is 5V

± 0.5V

74AC74

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