Philips Semiconductors

Product specification

74LVC652

Octal transceiver/register with dual enable (3-State)

1998 Jul 29

3

PIN CONFIGURATION

SV00767

1

2

3

4

5

6

7

8

9

10

11

12

CP AB

S AB

OE AB

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

GND

V CC

CP BA

S BA

OE BA

B 0

B 1

B 2

B 3

B 4

B 5

B 6

B 7

24

23

22

21

20

19

18

17

16

15

14

13

PIN DESCRIPTION

PIN NUMBER

SYMBOL

FUNCTION

1

‘A’ to ‘B’ clock input

(LOW-to-HIGH, edge-triggered)

2

Select ‘A’ to ‘B’ source input

3

Output enable B to A input

(active LOW)

4, 5, 6, 7, 8,

9, 10, 11

‘A’ data inputs/outputs

12

GND

Ground (0V)

20, 19, 18, 17,

16, 15, 14, 13

‘B’ data inputs/outputs

21

Output enable A to B input

22

Select ‘B’ to ‘A’ source input

23

‘B’ to ‘A’ clock input

(LOW-to-HIGH, edge-triggered)

24

Positive supply voltage

FUNCTION TABLE

INPUTS

DATA I/O *

FUNCTION

FUNCTION

L

L

H

H

H or L

↑

H or L

↑

X

X

X

X

input

input

isolation

store A and B data

X

H

H

H

↑

↑

H or L

↑

X

L

X

X

input

input

un *

output

store A, hold B,

store A in both registers

L

L

X

L

H or L

↑

↑

↑

X

X

X

L

un *

output

input

input

hold A, store B,

store B in both registers

L

L

L

L

X

X

X

H or L

X

X

L

H

output

input

real-time B data to A bus

stored B data to A bus

H

H

H

H

X

H or L

X

X

L

H

X

X

input

output

real-time A data to B bus

stored A data to B bus

H

L

H or L

H or L

H

H

output

output

stored A data to B bus and

stored B data to A bus

*

The data output functions may be enabled or disabled by

functions are always enabled, i.e., data at the bus inputs will

be stored on every LOW-to-HIGH transition on the clock

inputs.

un

= unspecified

H

= HIGH voltage level

L

= LOW voltage level

X

= Don’t care

↑

= LOW–to–HIGH level transition