74HCT648 datasheet(8/12 Pages) PHILIPS

Numer części	74HCT648

Szczegółowy opis	Octal bus transceiver/register; 3-state; inverting

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Producent	PHILIPS [NXP Semiconductors]

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8 / 12 page

December 1990

8

Philips Semiconductors

Product speciﬁcation

Octal bus transceiver/register; 3-state;

inverting

74HC/HCT648

AC CHARACTERISTICS FOR 74HCT

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

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

An, Bn to Bn, An

14

27

34

41

ns

4.5

Fig.6

tPHL/ tPLH

propagation delay

CPAB, CPBA to Bn, An

25

46

58

69

ns

4.5

Fig.7

tPHL/ tPLH

propagation delay

SAB, SBA to Bn, An

20

38

48

57

ns

4.5

Fig.8

tPZH/ tPZL

3-state output enable

time

OE to An, Bn

21

40

50

60

ns

4.5

Fig.9

tPHZ/ tPLZ

3-state output disable

time

OE to An, Bn

20

35

44

53

ns

4.5

Fig.9

tPZH/ tPZL

3-state output enable

time

DIR to An, Bn

20

40

50

60

ns

4.5

Fig.10

tPHZ/ tPLZ

3-state output disable

time

DIR to An, Bn

21

35

44

53

ns

4.5

Fig.10

tTHL/ tTLH

output transition time

5

12

15

18

ns

4.5

Fig.6 and Fig.8

tW

clock pulse width

HIGH or LOW

CPAB or CPBA

16

7

20

24

ns

4.5

Fig.7

tsu

set-up time

An, Bn to CPAB, CPBA

12

2

15

18

ns

4.5

Fig.7

th

hold time

An, Bn to CPAB, CPBA

5

0

5

ns

4.5

Fig.7

fmax

maximum clock pulse

frequency

30

80

24

20

ns

MHz

Fig.7

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