Philips Semiconductors

Preliminary specification

74AVC16835

18-bit Registered Driver (3-State)

1999 Jul 23

3

PIN DESCRIPTION

PIN NUMBER

SYMBOL

NAME AND FUNCTION

1, 2, 55

NC

No connection

3, 5, 6, 8, 9, 10, 12, 13,

14, 15, 16, 17, 19, 20,

21, 23, 24, 26

Data outputs

4, 11, 18, 25, 32, 39, 46,

53, 56

GND

Ground (0V)

7, 22, 35, 50

Positive supply voltage

27

OE

Output enable input

(active LOW)

28

LE

Latch enable input

(active HIGH)

30

CP

Clock input

54, 52, 51, 49, 48, 47,

45, 44, 43, 42, 41, 40,

38, 37, 36, 34, 33, 31

Data inputs

LOGIC SYMBOL

SH00138

CP

LE

D

OE

CP

LE

TO THE 17 OTHER CHANNELS

LOGIC SYMBOL (IEEE/IEC)

1

∇

1

30

28

54

52

51

49

48

47

45

44

43

42

41

40

38

37

36

34

33

31

3

5

6

8

9

10

12

13

14

15

16

17

19

20

21

23

24

26

3D

27

2C3

EN1

OE

CP

LE

C3

G2

SH00154

FUNCTION TABLE

INPUTS

OUTPUTS

OE

LE

CP

A

OUTPUTS

H

X

X

X

Z

L

H

X

L

L

L

H

X

H

H

L

L

↑

L

L

L

L

↑

H

H

L

L

H

X

L

L

L

X

H

=

HIGH voltage level

L

=

LOW voltage level

X

=

Don’t care

Z

=

High impedance “off” state

↑

=

LOW-to-HIGH level transition

NOTES:

1. Output level before the indicated steady-state input conditions

were established, provided that CP is high before LE goes low.

2. Output level before the indicated steady-state input conditions

were established.