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CD54HC221 Datasheet, PDF (3/18 Pages) Texas Instruments – High-Speed CMOS Logic Dual Monostable Multivibrator with Reset
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CD54HC221, CD74HC221, CD74HCT221
Logic Diagram
A
B
1 (9) 2 (10)
C
N
R
3 (11)
S
R
QM
QM
MASK
FF
S
Q
R
MAIN
FF
Q
4 (12)
Q
(13) 5
Q
VCC
16
P
RX
RESET
FF
VCC
PP
R
D
C
VCC
QC
MIRROR VOLTAGE
R1
P
OP
AMP
-
+
P
R2
R3
R4
15 (7)
RXCX
CX
PULLDOWN
N VCC
FF
DQ
C
CQ
R
14 (6)
CX
N
8
GND
+
-
OP AMP
3
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