74AC74TTR datasheet(5/12 Pages) STMICROELECTRONICS

Il numero della parte	74AC74TTR

Spiegazioni elettronici	DUAL D-TYPE FLIP FLOP WITH PRESET AND CLEAR

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

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74AC74

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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr =tf = 3ns)

(*) Voltage range is 3.3V

± 0.3V

(**) Voltage range is 5.0V

± 0.5V

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 xVCC xfIN +ICC/2 (per

Fli p-Flop)

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 CK to Q or Q

3.3(*)

7.0

14.0

16.0

17.5

ns

5.0(**)

5.0

10.0

10.5

12.0

tPLH tPHL Propagation Delay

Time PR or CLR to

Qor Q

3.3(*)

6.0

12.0

13.5

14.0

ns

5.0(**)

4.5

9.5

10.5

tW

Pulse Width HIGH

or LOW, CK or PR

or CLR

3.3(*)

5.0

1.5

7.0

ns

5.0(**)

4.0

1.5

5.0

ts

Setup Time D to CK

HIGH or LOW

3.3(*)

4.0

-0.2

4.0

ns

5.0(**)

3.0

-0.2

3.0

th

Hold Time D to CK

HIGH or LOW

3.3(*)

2.0

0.2

3.0

ns

5.0(**)

2.0

0.2

3.0

tREM

Removal Time

PR or CLR to CK

3.3(*)

1.0

-1.0

1.0

ns

5.0(**)

1.0

-0.7

1.0

fMAX

Maximum Clock

Frequency

3.3(*)

100

300

90

MHz

5.0(**)

140

300

130

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

5.0

3

pF

CPD

Power Dissipation

Capacitance

(note 1)

5.0

fIN = 10MHz

35

pF

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