SN54HC377, SN74HC377

OCTAL DTYPE FLIPFLOPS

WITH CLOCK ENABLE

SCLS307B– JANUARY 1996 – REVISED JANUARY 2003

1

POST OFFICE BOX 655303

Clocking

– Buffer/Storage Registers

– Shift Registers

– Pattern Generators

description/ordering information

These devices are positive-edge-triggered octal

D-type flip-flops with an enable input. The ’HC377

devices are similar to the ’HC273 devices, but

feature a latched clock-enable (CLKEN) input

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

(CLK) pulse, if CLKEN is low. Clock triggering

occurs at a particular voltage level and is not

directly related to the transition time of the

positive-going pulse. When CLK is at either the

high or low level, the D input has no effect at the

output. These devices are designed to prevent

false clocking by transitions at CLKEN.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP – N

Tube

SN74HC377N

SN74HC377N

40

°Cto85°C

SOIC

DW

Tube

SN74HC377DW

HC377

–40

°C to 85°C

SOIC – DW

Tape and reel

SN74HC377DWR

HC377

SOP – NS

Tape and reel

SN74HC377NSR

HC377

CDIP – J

Tube

SNJ54HC377J

SNJ54HC377J

–55

°C to 125°C

CFP – W

Tube

SNJ54HC377W

SNJ54HC377W

55 C to 125 C

LCCC – FK

Tube

SNJ54HC377FK

SNJ54HC377FK

† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are

available at www.ti.com/sc/package.

32 1 20 19

910 11 1213

4

5

6

7

8

18

17

16

15

14

8D

7D

7Q

6Q

6D

2D

2Q

3Q

3D

4D

SN54HC377 . . . FK PACKAGE

(TOP VIEW)

SN54HC377 ...J OR W PACKAGE

SN74HC377 ...DW, N, OR NS PACKAGE

(TOP VIEW)

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

CLKEN

1Q

1D

2D

2Q

3Q

3D

4D

4Q

GND

8Q

8D

7D

7Q

6Q

6D

5D

5Q

CLK

Copyright

 2003, Texas Instruments Incorporated

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.

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.

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.