TC74HCT574AF datasheet(4/7 Pages) TOSHIBA

Il numero della parte	TC74HCT574AF

Spiegazioni elettronici	Octal D-Type Flip-Flop with 3-State Output

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Produttore elettronici	TOSHIBA [Toshiba Semiconductor]

Homepage	http://www.semicon.toshiba.co.jp/eng

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4 / 7 page

TC74HCT574AP/AF

2007-10-01

4

Timing Requirements (input: tr = tf = 6 ns)

Test Condition

Ta

= 25°C

Ta

=

−40

~85°C

Characteristics

Symbol

VCC (V)

Typ.

Limit

Unit

Minimum pulse width

(CK)

tW (H)

tW (L)

⎯

4.5

5.5

⎯

15

14

19

17

ns

Minimum set-up time

(Dn)

ts

⎯

4.5

5.5

⎯

15

14

19

17

ns

Minimum hold time

(Dn)

th

⎯

4.5

5.5

⎯

0

ns

Clock frequency

f

⎯

4.5

5.5

⎯

31

34

25

27

MHz

AC Characteristics (input: tr = tf = 6 ns)

Test Condition

Ta

= 25°C

Ta

= −40~85°C

Characteristics

Symbol

CL (pF) VCC (V)

Min

Typ.

Max

Min

Max

Unit

Output transition time

tTLH

tTHL

⎯

50

4.5

5.5

⎯

7

6

12

11

⎯

15

14

ns

50

4.5

5.5

⎯

19

16

30

27

⎯

38

34

Propagation delay

time

(CK-Q)

tpLH

tpHL

⎯

150

4.5

5.5

⎯

24

21

40

35

⎯

48

44

ns

50

4.5

5.5

⎯

19

16

30

27

⎯

38

34

Output enable time

tpZL

tpZH

RL = 1 kΩ

150

4.5

5.5

⎯

24

21

40

35

⎯

48

44

ns

Output disable time

tpLZ

tpHZ

RL = 1 kΩ

50

4.5

5.5

⎯

19

16

30

27

⎯

38

34

ns

Maximum clock

frequency

fmax

⎯

50

4.5

5.5

31

34

50

60

⎯

25

27

⎯

MHz

Input capacitance

CIN

⎯

5

10

⎯

10

pF

Output capacitance

COUT

⎯

10

⎯

pF

Power dissipation

capacitance

CPD

(Note)

⎯

62

⎯

pF

Note:

CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating

current consumption without load.

Average operating current can be obtained by the equation:

ICC (opr) = CPD･VCC･fIN + ICC/8 (per bit)

And the total CPD when n pcs. of flip flop operate can be gained by the following equation:

CPD (total) = 47 + 15･n

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