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SN54/74LS682
SN54/74LS684
8-BIT MAGNITUDE SN54/74LS688
COMPARATORS
The SN54 / 74LS682, 684, 688 are 8-bit magnitude comparators. These
device types are designed to perform comparisons between two eight-bit
binary or BCD words. All device types provide P = Q outputs and the LS682 8-BIT MAGNITUDE
and LS684 have P>Q outputs also. COMPARATORS
The LS682, LS684 and LS688 are totem pole devices. The LS682 has a
20 k pullup resistor on the Q inputs for analog or switch data. LOW POWER SCHOTTKY
CONNECTION DIAGRAMS (TOP VIEW)
VCC P=Q Q7 P7 Q6 P6 Q5 P5 Q4 P4 J SUFFIX
20 19 18 17 16 15 14 13 12 11 CERAMIC
CASE 732-03
20
1
SN54/74LS682/684
N SUFFIX
PLASTIC
1 2 3 4 5 6 7 8 9 10 CASE 738-03
20
P>Q P0 Q0 P1 Q1 P2 Q2 P3 Q3 GND
1
DW SUFFIX
VCC P=Q Q7 P7 Q6 P6 Q5 P5 Q4 P4 SOIC
20
20 19 18 17 16 15 14 13 12 11 CASE 751D-03
1
SN54/74LS688
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
1 2 3 4 5 6 7 8 9 10 SN74LSXXXDW SOIC
G P0 Q0 P1 Q1 P2 Q2 P3 Q3 GND
FUNCTION TABLE
INPUTS OUTPUTS
OUTPUT OUTPUT DATA ENABLES
TYPE P=Q P>Q ENABLE CONFIGURATION PULLUP
P, Q G, GT G2 P=Q P>Q
LS682 yes yes no totem-pole yes
P=Q L L L H
LS684 yes yes no totem-pole no P>Q L L H L
LS688 yes no yes totem-pole no P X H H H H
H = HIGH Level, L = LOW Level, X = Irrelevant
FAST AND LS TTL DATA
5-1
SN54/74LS682