SN74F378

HEX DTYPE FLIPFLOP

WITH CLOCK ENABLE

SDFS030B − D2932, MARCH 1987 − REVISED OCTOBER 1993

Copyright

2−1

POST OFFICE BOX 655303

POST OFFICE BOX 1443

With Single-Rail Outputs

Buffer/Storage Registers

Shift Registers

Pattern Generators

Small-Outline Packages and Standard

Plastic 300-mil DIPs

description

The SN74F378 is a positive-edge-triggered D-type flip-flop with a clock enable (CLKEN) input. The SN74F378

is similar to the SN74F174 but features a common clock enable instead of a common clear.

Information at the data (D) inputs meeting the setup time requirements is transferred to the Q outputs on the

positive-going edge of the clock pulse if CLKEN is low. Clock triggering occurs at a particular voltage level and

is not directly related to the positive-going pulse. When the clock (CLK) input is at either the high or low level,

the D-input signal has no effect at the output.

The SN74F378 is characterized for operation from 0

°C to 70°C.

FUNCTION TABLE

(each flip-flop)

INPUTS

OUTPUT

CLKEN

CLK

D

OUTPUT

Q

H

X

X

Q0

L

↑

HH

L

↑

LL

X

L

X

Q0

14

6D

6Q

15

2D

3

1D

4

2D

6

3D

11

4D

13

5D

1Q

2

2Q

5

3Q

7

4Q

10

5Q

12

G1

1

9

CLK

CLKEN

1C2

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

D OR N PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

CLKEN

1Q

1D

2D

2Q

3D

3Q

GND

6Q

6D

5D

5Q

4D

4Q

CLK

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.