74HC534 datasheet(7/13 Pages) PHILIPS

Il numero della parte	74HC534

Spiegazioni elettronici	Octal D-type flip-flop; positive edge-trigger; 3-state; inverting

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Produttore elettronici	PHILIPS [NXP Semiconductors]

Homepage	http://www.nxp.com

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7 / 13 page

1998 Apr 10

7

Philips Semiconductors

Product speciﬁcation

Octal D-type ﬂip-ﬂop; positive edge-trigger;

3-state; inverting

74HC/HCT534

DC CHARACTERISTICS FOR 74HCT

For the DC characteristics see chapter

“74HC/HCT/HCU/HCMOS Logic Family Specifications”.

Output capability: bus driver ICC category: MSI.

Note to HCT types

The value of additional quiescent supply current (

∆I

CC) for a unit load of 1 is given in the family specifications.

To determine

∆ICC per input, multiply this value by the unit load coefficient shown in the table below.

AC CHARACTERISTICS FOR 74HCT

GND = 0 V; tr =tf = 6 ns; CL =50pF

INPUT

UNIT LOAD COEFFICIENT

OE

1.25

CP

0.90

Dn

0.35

SYMBOL

PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

74HCT

VCC

(V)

WAVEFORMS

+25

−40 to +85 −40 to +125

min. typ. max min. max.

min.

max.

tPHL/ tPLH

propagation delay

CP to Qn

16

30

38

45

ns

4.5

Fig.6

tPZH/ tPZL

3-state output enable time

OE to Qn

16

30

38

45

ns

4.5

Fig.7

tPHZ/ tPLZ

3-state output disable

time OE to Qn

18

30

38

45

ns

4.5

Fig.7

tTHL/ tTLH

output transition time

5

12

15

18

ns

4.5

Fig.6

tW

clock pulse width

HIGH or LOW

23

14

29

35

ns

4.5

Fig.6

tsu

set-up time

Dn to CP

12

4

15

18

ns

4.5

Fig.8

th

hold time

Dn to CP

5

−1

5

ns

4.5

Fig.8

fmax

maximum clock pulse

frequency

22

36

18

15

MHz

4.5

Fig.6

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