3
Logic Diagram
1 (9)
A
2 (10)
B
S
QM QM
R
S
MASK
FF
MAIN
FF
QQ
R
3 (11)
4 (12) (13) 5
QQ
C
P
Q
R
QD
C
C
V
CC
R
D
C
QC
RESET
FF
V
CC
PP
R1
PULLDOWN
FF
N
-
+
MIRROR VOLTAGE
V
CC
+
-
P
OP
AMP
R3
P
R2
R4
N
GND
8
15 (7)
R
X
C
X
CC
16
C
X
C
X
14 (6)
OP AMP
R
R
X
N
CD54HC221, CD74HC221, CD74HCT221
