SN54HC684, SN74HC684

8-BIT MAGNITUDE COMPARATORS

SCLS340A – MARCH 1996 – REVISED MAY 1997

1

POST OFFICE BOX 655303

Small-Outline (DW) and Ceramic Flat (W)

Packages, Ceramic Chip Carriers (FK), and

Standard Plastic (N) and Ceramic (J)

300-mil DIPs

description

These

magnitude

comparators

perform

comparisons of two 8-bit binary or BCD words.

These devices provide P = Q and P > Q outputs.

The SN54HC684 is characterized for operation

over the full military temperature range of –55

°C

to 125

°C. The SN74HC684 is characterized for

operation from –40

°C to 85°C.

FUNCTION TABLE

DATA

INPUTS

OUTPUTS

INPUTS

P, Q

P = Q

P > Q

P = Q

L

H

P > Q

H

L

P < Q

H

H

The P < Q function can be

generated by applying P = Q

and P > Q to a 2-input NAND

gate.

Copyright

© 1997, Texas Instruments Incorporated

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.

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.

SN54HC684 ...J OR W PACKAGE

SN74HC684 . . . DW OR N PACKAGE

(TOP VIEW)

SN54HC684 . . . FK PACKAGE

(TOP VIEW)

32 1 20 19

910 11 12 13

4

5

6

7

8

18

17

16

15

14

Q7

P7

Q6

P6

Q5

P1

Q1

P2

Q2

P3

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

P > Q

P0

Q0

P1

Q1

P2

Q2

P3

Q3

GND

P = Q

Q7

P7

Q6

P6

Q5

P5

Q4

P4