SN54HC684, SN74HC684
8-BIT MAGNITUDE COMPARATORS
SCLS340B – MARCH 1996 – REVISED MARCH 2003
Wide Operating Voltage Range of 2 V to 6 V
Typical t = 22 ns
pd
High-Current Outputs Drive Up To 10
LSTTL Loads
±4-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Low Power Consumption, 80-µA Max I
CC
Compare Two 8-Bit Words
SN54HC684 . . . FK PACKAGE
(TOP VIEW)
SN54HC684 . . . J OR W PACKAGE
SN74HC684 . . . DW OR N PACKAGE
(TOP VIEW)
P > Q
P0
V
CC
P = Q
Q7
1
2
3
4
5
6
7
8
9
20
19
18
3
2
1
20 19
18
Q0
P1
Q7
P7
Q6
P1
Q1
P2
Q2
P3
4
5
6
7
8
17 P7
16 Q6
15 P6
14 Q5
13 P5
12 Q4
11 P4
17
16
Q1
P2
15 P6
14
9 10 11 12 13
Q2
P3
Q5
Q3
GND 10
description/ordering information
These magnitude comparators perform comparisons of two 8-bit binary or BCD words. These devices provide
P = Q and P > Q outputs.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP – N
Tube
SN74HC684N
SN74HC684N
–40°C to 85°C
–55°C to 125°C
Tube
SN74HC684DW
SN74HC684DWR
SNJ54HC684J
SNJ54HC684W
SNJ54HC684FK
SOIC – DW
HC684
Tape and reel
Tube
CDIP – J
CFP – W
LCCC – FK
SNJ54HC684J
SNJ54HC684W
SNJ54HC684FK
Tube
Tube
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
FUNCTION TABLE
DATA
INPUTS
P, Q
OUTPUTS
P = Q P > Q
P = Q
P > Q
P < Q
L
H
H
H
L
H
The P < Q function can be
generated by applying P = Q
and P > Q to a 2-input NAND
gate.
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.
Copyright 2003, 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.
1
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