SN54HCT273, SN74HCT273

OCTAL DTYPE FLIPFLOPS

WITH CLEAR

SCLS068E − NOVEMBER 1988 − REVISED AUGUST 2003

1

POST OFFICE BOX 655303

− Buffer/Storage Registers

− Shift Registers

− Pattern Generators

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

CLR

1Q

1D

2D

2Q

3Q

3D

4D

4Q

GND

8Q

8D

7D

7Q

6Q

6D

5D

5Q

CLK

SN54HCT273 ...J OR W PACKAGE

SN74HCT273 . . . DB, DW, N, NS, OR PW PACKAGE

(TOP VIEW)

3

2120 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

8D

7D

7Q

6Q

6D

2D

2Q

3Q

3D

4D

SN54HCT273 . . . FK PACKAGE

(TOP VIEW)

description/ordering information

These devices are positive-edge-triggered D-type flip-flops with a common enable input. The ’HCT273 devices

are similar to the ’HCT377 devices, but feature a common clear enable (CLR) input instead of a latched clock.

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. Clock triggering occurs at a particular voltage level and is not

directly related to the positive-going pulse. When CLK is at either the high or low level, the D input has no effect

at the output. The circuits are designed to prevent false clocking by transitions at CLR.

ORDERING INFORMATION

TA

PACKAGE†

ORDERABLE

PART NUMBER

TOP-SIDE

MARKING

PDIP − N

Tube of 20

SN74HCT273N

SN74HCT273N

SOIC − DW

Tube of 25

SN74HCT273DW

HCT273

SOIC − DW

Reel of 2000

SN74HCT273DWR

HCT273

−40

°C to 85°C

SOP − NS

Reel of 2000

SN74HCT273NSR

HCT273

−40

°C to 85°C

SSOP − DB

Reel of 2000

SN74HCT273DBR

HT273

Tube of 70

SN74HCT273PW

TSSOP − PW

Reel of 2000

SN74HCT273PWR

HT273

TSSOP − PW

Reel of 250

SN74HCT273PWT

HT273

CDIP − J

Tube of 20

SNJ54HCT273J

SNJ54HCT273J

−55

°C to 125°C

CFP − W

Tube of 85

SNJ54HCT273W

SNJ54HCT273W

−55 C to 125 C

LCCC − FK

Tube of 55

SNJ54HCT273FK

SNJ54HCT273FK

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

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

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.

UNLESS OTHERWISE NOTED this document contains PRODUCTION

DATA information 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.