HD74HC93 Datasheet, PDF (2/8 Pages) Hitachi Semiconductor – 4-bit Binary Counter

HD74HC93
BCD Count Sequence
Outputs
Count
QD
QC
QB
QA
0
L
L
L
L
1
L
L
L
H
2
L
L
H
L
3
L
L
H
H
4
L
H
L
L
5
L
H
L
H
6
L
H
H
L
7
L
H
H
H
8
H
L
L
L
9
H
L
L
H
10
H
L
H
L
11
H
L
H
H
12
H
H
L
L
13
H
H
L
H
14
H
H
H
L
15
H
H
H
H
Note: Output QA is connected to input B for BCD count.
H : High level
L : Low level
X : Irrelevant
Pin Arrangement
B1
R0(1) 2
R0(2) 3
NC 4
Vcc 5
NC 6
NC 7
BA
R0(1)
R0(2) QA
QD
QB
QC
(Top View)
14 A
13 NC
12 QA
11 QD
10 GND
9 QB
8 QC
Rev.2.00, Oct 06, 2005 page 2 of 7