74HC688 View Datasheet(PDF) - Nexperia B.V. All rights reserved
Part Name
Description
Manufacturer
74HC688 Datasheet PDF : 16 Pages
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Nexperia
74HC688
8-bit magnitude comparator
5 Pinning information
5.1 Pinning
74HC688
E1
P0 2
Q0 3
P1 4
Q1 5
P2 6
Q2 7
P3 8
Q3 9
GND 10
20 VCC
19 P=Q
18 Q7
17 P7
16 Q6
15 P6
14 Q5
13 P5
12 Q4
11 P4
aaa-028703
Figure 4. Pin configuration SOT163-1 (SO20)
74HC688
E1
P0 2
Q0 3
P1 4
Q1 5
P2 6
Q2 7
P3 8
Q3 9
GND 10
20 VCC
19 P=Q
18 Q7
17 P7
16 Q6
15 P6
14 Q5
13 P5
12 Q4
11 P4
aaa-028704
Figure 5. Pin configuration SOT339-1 (SSOP20)
and SOT360-1 (TSSOP20)
5.2 Pin description
Table 2. Pin description
Symbol
E
P0, P1, P2, P3, P4, P5, P6, P7
Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7
GND
P=Q
VCC
Pin
1
2, 4, 6, 8, 11, 13, 15, 17
3, 5, 7, 9, 12, 14, 16, 18
10
19
20
6 Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care.
inputs
data Pn, Qn
E
P=Q
L
P>Q
L
P<Q
L
X
H
Description
enable input (active LOW)
word P inputs
word Q inputs
ground (0 V)
equal to output
supply voltage
output
P=Q
L
H
H
H
74HC688
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 4 July 2018
© Nexperia B.V. 2018. All rights reserved.
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