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Datasheet Quick-Ref
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74HC669
Synchronous 4-Bit Up/Down Counter
Datasheet (PDF)
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74HC669
DIP-16
1
U/~D
2
CLK
3
A
4
B
5
C
6
D
7
~CEP
8
GND
16
VCC
15
~TC
14
QA
13
QB
12
QC
11
QD
10
~CET
9
~PE
vcc
gnd
in
out
io
Pin Reference
⌄
#
Label
Type
1
U/~D
in
2
CLK
in
3
A
in
4
B
in
5
C
in
6
D
in
7
~CEP
in
8
GND
gnd
9
~PE
in
10
~CET
in
11
QD
out
12
QC
out
13
QB
out
14
QA
out
15
~TC
out
16
VCC
vcc