SN54HC688 Datasheet, PDF (1/13 Pages) Texas Instruments – 8-BIT IDENTITY COMPARATORS

D Wide Operating Voltage Range of 2 V to 6 V
D High-Current Outputs Drive Up To 10
LSTTL Loads
D Low Power Consumption, 80-µA Max I_CC
SN54HC688 . . . J OR W PACKAGE
SN74HC688 . . . DW, N, OR PW PACKAGE
(TOP VIEW)
OE 1
P0 2
Q0 3
P1 4
Q1 5
P2 6
Q2 7
P3 8
Q3 9
GND ¹⁰
20 V_CC
19 P = Q
18 Q7
17 P7
16 Q6
15 P6
14 Q5
13 P5
12 Q4
11 _P4
SN54HC688, SN74HC688
8-BIT IDENTITY COMPARATORS
SCLS010D – DECEMBER 1982 – REVISED AUGUST 2003
D Typical t_pd = 14 ns
D ±4-mA Output Drive at 5 V
D Low Input Current of 1 µA Max
D Compare Two 8-Bit Words
SN54HC688 . . . FK PACKAGE
(TOP VIEW)
P1
3 2 1 20 19
4
18
Q7
Q1 5
17 P7
P2 6
16 Q6
Q2 7
15 P6
P3 8
14 Q5
9 10 11 12 13
description/ordering information
These identity comparators perform comparisons of two 8-bit binary or BCD words. An output-enable (OE) input
may be used to force the output to the high level.
ORDERING INFORMATION
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N
Tube of 20
SN74HC688N
SN74HC688N
–40°C to 85°C
SOIC – DW
Tube of 25
Reel of 2000
SN74HC688DW
SN74HC688DWR
HC688
TSSOP – PW
Tube of 2000
Reel of 250
SN74HC688PWR
SN74HC688PWT
HC688
CDIP – J
Tube of 20
SNJ54HC688J
SNJ54HC688J
–55°C to 125°C CFP – W
Tube of 85
SNJ54HC688W
SNJ54HC688W
LCCC – FK
Tube of 55
SNJ54HC688FK
SNJ54HC688FK
† _{Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines}
are available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
DATA
P, Q
OE
OUTPUT
P=Q
P=Q
L
L
P>Q
X
H
P<Q
X
H
X
H
H
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2003, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
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