Philips Semiconductors

Product specification

74ALS377

Octal D flip-flop with enable

1991 Feb 08

3

LOGIC DIAGRAM

DQ

CP

D

CP

D

CP

DQ

CP

Q

Q

34

7

8

11

Q0

Q1

Q2

Q3

CP

D0

D1

D2

D3

DQ

CP

D

CP

D

CP

DQ

CP

Q

Q

13

14

17

18

D4

D5

D6

D7

1

2

5

6

9

12

15

16

19

Q4

Q5

Q6

Q7

E

SF00353

GND = Pin 10

FUNCTION TABLE

INPUTS

OUTPUTS

OPERATING MODE

E

CP

Dn

Qn

OPERATING MODE

l

↑

h

H

Load “1”

l

↑

l

L

Load “0”

h

↑

X

NC

Hold (do nothing)

H

X

X

NC

Hold (do nothing)

H = High-voltage level

h

= High state must be present one setup time before the Low-to-High clock transition

L

= Low-voltage level

l

= Low state must be present one setup time before the Low-to-High clock transition

NC= No change

X = Don’t care

↑ = Low-to-High clock transition