Philips Semiconductors
Product specification
Dual non-retriggerable monostable
multivibrator with reset
T
amb
(°C)
74HC
SYMBOL
PARAMETER
74HC/HCT221
TEST CONDITIONS
UNIT
V
CC
WAVEFORMS
(V)
2.0
4.5
6.0
2.0
4.5
6.0
2.0
4.5
6.0
4.5
to
5.5
2.0
4.5
6.0
2.0
5.0
2.0
5.0
C
EXT
= 28 nF;
R
EXT
= 2 kΩ;
Fig.10
C
EXT
= 1 nF;
R
EXT
= 2 kΩ;
Fig.10
C
EXT
= 1 nF;
R
EXT
= 10 kΩ;
Fig.10
C
EXT
= 1000 pF;
R
EXT
= 10 kΩ
Fig.9
+25
−40
to
+85
−
−40
to
+125
min.
−
max.
min typ max. min
max.
t
W
output pulse width
nQ or nQ
output pulse width
nQ or nQ
output pulse width
nQ or nQ
pulse width match
between circuits
in the package
removal time
nR
D
to nA
or nB
external timing resistor
external timing capacitor
100
20
17
10
2
no limits
140
ns
t
W
1.5
−
−
µs
t
W
7
−
−
µs
t
W
±
2
−
−
%
t
rem
30
11
9
125
25
21
1000
−
1000
−
150
30
26
−
−
ns
R
EXT
C
EXT
kΩ
pF
Fig.12
Fig.13
Fig.12
Fig.13
December 1990
7
PHILIPS [ NXP SEMICONDUCTORS ]
