2

PS8090C 02/07/00

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PI74ALVCH16721

3.3V 20-Bit Flip-Flop with 3-State Outputs

s

t

u

p

n

Is

t

u

p

t

u

O

E

ON

E

K

L

CK

L

Cx

Dx

Q

LH

X

X

LL

↑

HH

LL

↑

LL

LL

H

r

o

LX

HX

X

X

Z

Pin Name

Description

OE

Output Enable Input (Active LOW)

CLKEN

Clock Enable Input (Active LOW)

CLK

Clock Input (Active HIGH)

Dx

Data Inputs

Qx

3-State Outputs

GND

Ground

Power

Product Pin Description

Product Pin Configuration

Notes:

1. H = High Signal Level

L = Low Signal Level

X = Don't Care or Irrelevant

Z = High Impedance

↑ = LOW-to-HIGH Transition

1

OE

Q1

Q2

GND

Q3

Q4

VCC

Q5

Q6

Q7

GND

Q8

Q9

Q10

Q11

Q12

Q13

GND

Q14

Q15

Q16

VCC

Q17

Q18

GND

Q19

Q20

NC

CLK

D1

D2

GND

D3

D4

VCC

D5

D6

D7

GND

D8

D9

D10

D11

D12

D13

GND

D14

D15

D16

VCC

D17

D18

GND

D19

D20

CLKEN

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

56

55

54

53

52

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

25

26

27

28

32

31

30

29

56-Pin

A,V