SN74LVC2G74DCUR 参数 Datasheet PDF下载

SINGLE POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP

WITH CLEAR AND PRESET

SCES203M – APRIL 1999 – REVISED FEBRUARY 2007

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FUNCTION TABLE

INPUTS

PRE

L

H

L

H

H

H

(1)

CLR

H

L

L

H

H

H

CLK

X

X

X

↑

↑

L

D

X

X

X

H

L

X

Q

H

L

H

(1)

H

L

Q

0

OUTPUTS

Q

L

H

H

(1)

L

H

Q

0

This configuration is nonstable; that is, it does not persist when PRE or CLR returns to its inactive

(high) level.

LOGIC DIAGRAM (POSITIVE LOGIC)

PRE

CLK

7

1

C

C

C

5

TG

Q

C

C

C

C

D

2

TG

TG

TG

3

C

CLR

6

C

C

Q

2