PI74FCT16841T/162841T

20-BIT TRANSPARENT LATCH

2

PS2078A 01/15/95

12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012

Pin Name

Description

xDx

Data Inputs

xLE

Latch Enable Input (Active LOW)

xOE

Output Enable Input (Active LOW)

xQx

3-State Outputs

Product Pin Description

Product Configuration

Inputs

Outputs

xDx

xLE

xOE

xQx

HH

L

H

LH

L

L

XL

L

XXH

Z

Truth Table

(1)

1.

H = High Voltage Level

L = Low Voltage Level

X = Don’t Care

Z = High Impedance

2.

Output level before xLE HIGH-to-LOW

Transition.

1

OE

1

1

2

1

3

GND

4

1

5

1

6

7

1

8

1

9

1

10

GND

11

1

12

1

13

1

14

2

15

2

16

2

17

GND

18

2

19

2

20

2

21

22

2

23

2

24

1

LE

56

1

55

1

54

GND

53

1

52

1

51

50

1

49

1

48

1

47

GND

46

1

45

1

44

1

43

2

42

2

41

2

40

GND

39

2

38

2

37

2

36

35

2

34

2

33

GND

25

2

26

2

27

2

OE

28

GND

32

2

31

2

30

2

LE

29

56-PIN

V56

A56