8-BIT MAGNITUDE COMPARATORS
The SN54 / 74LS682, 684, 688 are 8-bit magnitude comparators. These device types are designe...
8-BIT MAGNITUDE 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 and LS684 have P>Q outputs also. The LS682, LS684 and LS688 are totem pole devices. The LS682 has a 20 kΩ pullup resistor on the Q inputs for analog or switch data. CONNECTION DIAGRAMS (TOP VIEW)
SN54/74LS682 SN54/74LS684 SN54/74LS688
8-BIT MAGNITUDE COMPARATORS
LOW POWER
SCHOTTKY
VCC P=Q 20 19
Q7 18
P7 17
Q6 16
P6 15
Q5 14
P5 13
Q4 12
P4 11
20 1
J SUFFIX CERAMIC CASE 732-03
SN54/74LS682/684
N SUFFIX PLASTIC CASE 738-03
1
1 P>Q
2 P0
3 Q0
4 P1
5 Q1
6 P2
7 Q2
8 P3
9 Q3
10 GND
20
VCC P=Q 20 19
Q7 18
P7 17
Q6 16
P6 15
Q5 14
P5 13
Q4 12
P4 11
20 1
DW SUFFIX SOIC CASE 751D-03
SN54/74LS688
ORDERING INFORMATION
SN54LSXXXJ Ceramic SN74LSXXXN Plastic SN74LSXXXDW SOIC
1 G
2 P0
3 Q0
4 P1
5 Q1
6 P2
7 Q2
8 P3
9 Q3
10 GND
FUNCTION TABLE
INPUTS TYPE LS682 LS684 LS688 P=Q yes yes yes P>Q yes yes no OUTPUT ENABLE no no yes OUTPUT CONFIGURATION totem-pole totem-pole totem-pole DATA PULLUP yes no no P, Q P=Q P>Q P
Q H L H H OUTPUTS
H = HIGH Level, L = LOW Level, X = Irrelevant
FAST AND LS TTL DATA 5-603
SN54/74LS682 SN54/74LS684 SN54/74LS688
GUARANTEED OPERATING RANGES
Symbol VCC TA IOH IOL Supply Voltage Operating Ambient Temperature Range Output Current...
