SN54LVC574A, SN74LVC574A

OCTAL EDGETRIGGERED DTYPE FLIPFLOPS

WITH 3STATE OUTPUTS

SCAS301R − JANUARY 1993 − REVISED MARCH 2005

1

POST OFFICE BOX 655303

−40

°C to 125°C, and −55°C to 125°C

All Ports (5-V Input/Output Voltage With

Operation

JESD 17

− 2000-V Human-Body Model (A114-A)

− 200-V Machine Model (A115-A)

− 1000-V Charged-Device Model (C101)

SN54LVC574A ...J OR W PACKAGE

SN74LVC574A . . . DB, DGV, DW, N, NS,

OR PW PACKAGE

(TOP VIEW)

SN54LVC574A . . . FK PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

OE

1D

2D

3D

4D

5D

6D

7D

8D

GND

1Q

2Q

3Q

4Q

5Q

6Q

7Q

8Q

CLK

32 1 20 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

2Q

3Q

4Q

5Q

6Q

3D

4D

5D

6D

7D

SN74LVC574A . . . RGY PACKAGE

(TOP VIEW)

120

10

11

2

3

4

5

6

7

8

9

19

18

17

16

15

14

13

12

1Q

2Q

3Q

4Q

5Q

6Q

7Q

8Q

1D

2D

3D

4D

5D

6D

7D

8D

description/ordering information

These devices feature 3-state outputs designed specifically for driving highly capacitive or relatively

low-impedance loads. They are particularly suitable for implementing buffer registers, I/O ports, bidirectional

bus drivers, and working registers.

On the positive transition of the clock (CLK) input, the Q outputs are set to the logic levels at the data (D) inputs.

A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high

or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive

the bus lines significantly. The high-impedance state and increased drive provide the capability to drive bus

lines without interface or pullup components.

OE 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.

outputs, preventing damaging current backflow through the device when it is powered down.

Copyright

 2005, Texas Instruments Incorporated

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.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

On products compliant to MILPRF38535, all parameters are tested

unless otherwise noted. On all other products, production

processing does not necessarily include testing of all parameters.