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74HC688PW,112

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
74HC688
8-bit magnitude comparator
Rev. 3 — 4 July 2018 Product data sheet
1 General description
The 74HC688 is an 8-bit magnitude comparator. It performs comparisons of two 8-bit
binary or BCD words. Inputs include clamp diodes. This enables the use of current
limiting resistors to interface inputs to voltages in excess of V
CC
.
2 Features and benefits
• Compare two 8-bit words
• Wide supply voltage range from 2.0 to 6.0 V
• CMOS input levels
• Complies with JEDEC standard: no. 7A
• ESD protection:
– HBM JESD22-A114-F exceeds 2000 V
– MM JESD22-A115-A exceeds 200 V
• Multiple package options
• Specified from -40 °C to +85 °C and from -40 °C to +125 °C
3 Ordering information
Table 1. Ordering information
PackageType number
Temperature range Name Description Version
74HC688D −40 °C to +125 °C SO20 plastic small outline package; 20 leads;
body width 7.5 mm
SOT163-1
74HC688DB −40 °C to +125 °C SSOP20 plastic shrink small outline package; 20 leads;
body width 5.3 mm
SOT339-1
74HC688PW −40 °C to +125 °C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
SOT360-1
Nexperia
74HC688
8-bit magnitude comparator
4 Functional diagram
19P=Q
P0
P1
P2
P3
P4
P5
P6
P7
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
2
4
6
8
11
13
15
17
3
5
7
9
12
14
16
18
aaa-028700
1
E
Figure 1. Logic symbol
19(P=Q) 1
0
G1
7
Q
0
7
2
4
6
8
11
13
15
17
3
5
7
9
12
14
16
18
aaa-028701
P
COMP
1
Figure 3. IEC logic symbol
aaa-028702
P7
Q7
P6
Q6
P5
Q5
P4
Q4
P3
P=Q
Q3
P2
Q2
P1
Q1
P0
Q0
E
Figure 2. Logic diagram
74HC688 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 3 — 4 July 2018
2 / 16
Nexperia
74HC688
8-bit magnitude comparator
5 Pinning information
5.1 Pinning
74HC688
E V
CC
P0 P=Q
Q0 Q7
P1 P7
Q1 Q6
P2 P6
Q2 Q5
P3 P5
Q3 Q4
GND P4
aaa-028703
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
Figure 4. Pin configuration SOT163-1 (SO20)
74HC688
aaa-028704
1
2
3
4
5
6
7
8
9
10
12
11
14
13
16
15
18
17
20
19
V
CC
P=Q
Q7
P7
Q6
P6
Q5
P5
Q4
P4
E
P0
Q0
P1
Q1
P2
Q2
P3
Q3
GND
Figure 5. Pin configuration SOT339-1 (SSOP20)
and SOT360-1 (TSSOP20)
5.2 Pin description
Table 2. Pin description
Symbol Pin Description
E 1 enable input (active LOW)
P0, P1, P2, P3, P4, P5, P6, P7 2, 4, 6, 8, 11, 13, 15, 17 word P inputs
Q0, Q1, Q2, Q3, Q4, Q5, Q6, Q7 3, 5, 7, 9, 12, 14, 16, 18 word Q inputs
GND 10 ground (0 V)
P=Q 19 equal to output
V
CC
20 supply voltage
6 Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care.
inputs output
data Pn, Qn E P=Q
P=Q L L
P>Q L H
P<Q L H
X H H
74HC688 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2018. All rights reserved.
Product data sheet Rev. 3 — 4 July 2018
3 / 16
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

74HC688PW,112

Mfr. #:
Buy 74HC688PW,112
Manufacturer:
Nexperia
Description:
Logic Comparators 8-BIT MAGNITUDE
Lifecycle:
New from this manufacturer.
Delivery:
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