54ACT11534, 74ACT11534

OCTAL DTYPE EDGETRIGGERED FLIPFLOPS

WITH 3STATE OUTPUTS

SCAS038A − D2957, JULY 1987 − REVISED APRIL 1993

POST OFFICE BOX 655303

POST OFFICE BOX 1443

Copyright

2−1

PCB Layout

Minimize High-Speed Switching Noise

CMOS) 1-

mm Process

at 125

°C

Outline Packages, Ceramic Chip Carriers,

and Standard Plastic and Ceramic 300-mil

DIPs

description

These eight flip-flops feature 3-state outputs

designed for implementing buffer registers, I/O

ports, bidirectional bus drivers, and working

registers.

The eight flip-flops of the

′ACT11534 are

edge-triggered D-type flip-flops. On the positive

transition of the clock, the Q outputs are set to the

complement of the logic levels at the D inputs. The

′ACT11534 is functionally equivalent to the

′ACT11373 except for having inverted outputs.

An output-control input (OC) is used to place the

eight outputs in either a normal logic state (high or

low logic levels) or a high-impedance state. In the

high-impedance state, the outputs neither load

nor drive the bus lines significantly.

The

high-impedance third state and increased drive

provide the capability to drive the bus lines in a

bus-organized system without need for interface

or pull-up components. The output control (OC)

does not affect the internal operations of the

flip-flops. Old data can be retained, or new data

can be entered while the outputs are in the

high-impedance state.

The 54ACT11534 is characterized for operation

over the full military temperature range of − 55

°C

to 125

°C. The 74ACT11534 is characterized for

operation from − 40

°C to 85°C.

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

1Q

2Q

3Q

4Q

GND

GND

GND

GND

5Q

6Q

7Q

8Q

OC

1D

2D

3D

4D

5D

6D

7D

8D

CLK

54ACT11534 . . . JT PACKAGE

74ACT11534 . . . DW OR NT PACKAGE

(TOP VIEW)

32 1

13 14

5

6

7

8

9

10

11

7D

8D

CLK

NC

8Q

7Q

6Q

2D

1D

OC

NC

1Q

2Q

3Q

4

15 16 17 18

54ACT11534 . . . FK PACKAGE

(TOP VIEW)

28 27 26

25

24

23

22

21

20

19

12

INPUTS

OUTPUT

Q

L

L

L

H

FUNCTION TABLE

(each flip-flop)

OC

CLK

D

↑

↑

L

X

H

L

X

X

L

H

Q0

Z

NC − No internal connection

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

EPIC is a trademark of Texas Instruments Incorporated.