74HCT4520 datasheet(6/7 Pages) NXP

No de pièce	74HCT4520

Description	Dual 4-bit synchronous binary counter

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December 1990

6

Philips Semiconductors

Product speciﬁcation

Dual 4-bit synchronous binary counter

74HC/HCT4520

DC CHARACTERISTICS FOR 74HCT

For the DC characteristics see

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

Output capability: standard

ICC category: MSI

Note to HCT types

The value of additional quiescent supply current (

∆ICC) 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 = 50 pF

INPUT

UNIT LOAD COEFFICIENT

nCP0, nCP1

nMR

0.80

1.50

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

nCP0 to nQn

28

53

66

80

ns

4.5

Fig.8

tPHL/ tPLH

propagation delay

nCP1 to nQn

25

53

66

80

ns

4.5

Fig.8

tPHL

propagation delay

nMR to nQn

16

35

44

53

ns

4.5

Fig.9

tTHL/ tTLH

output transition time

7

15

19

22

ns

4.5

Fig.8

tW

clock pulse width

HIGH or LOW

20

10

25

30

ns

4.5

Fig.7

tW

master reset pulse width

HIGH

20

12

25

30

ns

4.5

Fig.7

trem

removal time

nMR to nCP0; nCP1

0

−8

0

ns

4.5

Fig.7

tsu

set-up time

nCP1 to nCP0;

nCP0 to nCP1

16

6

20

24

ns

4.5

Fig.8

fmax

maximum clock pulse

frequency

30

58

24

20

MHz

4.5

Fig.7

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Fabricant	No de pièce	Fiches technique	Description
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