Philips Semiconductors Advanced BiCMOS Products

Product specification

MB2841

Dual 10-bit bus interface latch (3-State)

August 24, 1993

2

PIN DESCRIPTION

PIN NUMBER

SYMBOL

FUNCTION

45, 44, 42, 41, 39, 38, 37, 36, 35, 34,

33, 32, 31, 29, 28, 27, 25, 24, 23, 22

1D0 – 1D9

2D0 – 2D9

Data inputs

48, 49, 50, 51, 1, 2, 3, 5, 6, 7, 8, 9,

10, 11, 12, 13, 15, 16, 18, 19

1Q0 – 1Q9

2Q0 – 2Q9

Data outputs

47, 20

1OE, 2OE

Output enable inputs (active-Low)

46, 21

1LE, 2LE

Latch enable inputs (active rising edge)

4, 17, 30, 43

GND

Ground (0V)

14, 26, 40, 52

Positive supply voltage

LOGIC SYMBOL (IEEE/IEC)

C1

C1

45

48

44

49

42

50

41

51

39

1

38

2

37

3

36

5

1D

46

EN

47

35

6

34

7

33

8

32

9

31

10

29

11

28

12

27

13

25

15

24

16

1D

21

EN

20

23

18

22

19

FUNCTION TABLE

INPUTS

OUTPUTS

OPERATING MODE

nOE

nLE

nDx

nQ0 – nQ9

L

L

H

H

L

H

L

H

Transparent

L

L

↓

↓

l

h

L

H

Latched

H

X

X

Z

High impedance

L

L

X

NC

Hold

H = High voltage level

h

= High voltage level one set-up time prior to the High-to-Low LE transition

L

= Low voltage level

l

= Low voltage level one set-up time prior to the High-to-Low LE transition

↓ = High-to-Low LE transition

NC= No change

X = Don’t care

Z = High impedance “off” state