NSC MM54C221J-883 Datasheet
TL/F/5904
MM54C221/MM74C221 Dual Monostable Multivibrator
February 1988
MM54C221/MM74C221 Dual Monostable Multivibrator
General Description
The MM54C221/MM74C221 dual monostable multivibrator
is a monolithic complementary MOS integrated circuit. Each
multivibrator features a negative-transition-triggered input
and a positive-transition-triggered input, either of which can
be used as an inhibit input, and a clear input.
Once fired, the output pulses are independent of further
transitions of the A and B inputs and are a function of the
external timing components C
EXT
and R
EXT
. The pulse
width is stable over a wide range of temperature and V
CC
.
Pulse stability will be limited by the accuracy of external
timing components. The pulse width is approximately defined by the relationship t
W(OUT)
&
C
EXTREXT
. For further
information and applications, see AN-138.
Features
Y
Wide supply voltage range 4.5V to 15V
Y
Guaranteed noise margin 1.0V
Y
High noise immunity 0.45 VCC(typ.)
Y
Low power TTL compatibility fan out of 2
driving 74L
Connection Diagrams
Timing Component
TL/F/5904– 1
Dual-In-Line Package
TL/F/5904– 2
Top View
Order Number MM54C221 or MM74C221
Truth Table
Inputs Outputs
Clear A B Q Q
LXXLH
XHXLH
XXLLH
HL
u
Éß
H
v
H Éß
H
e
High level
L
e
Low level
u
e
Transition from low to high
v
e
Transition from high to low
É
e
One high level pulse
ß
e
One low level pulse
X
e
Irrelevant
C
1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Voltage at Any Pin
b
0.3V to V
CC
a
0.3V
Operating Temperature Range
MM54C221
b
55§Ctoa125§C
MM74C221
b
40§Ctoa85§C
Storage Temperature Range
b
65§Ctoa150§C
Power Dissipation
Dual-In-Line 700 mW
Small Outline 500 mW
Operating V
CC
Range 4.5V to 15V
Absolute Maximum V
CC
18V
R
EXT
t
80 VCC(X)
Lead Temperature (Soldering, 10 seconds) 260§C
DC Electrical Characteristics Max/min limits apply across temperature range, unless otherwise noted
Symbol Parameter Conditions Min Typ Max Units
CMOS to CMOS
V
IN(1)
Logical ‘‘1’’ Input Voltage V
CC
e
5V 3.5 V
V
CC
e
10V 8.0 V
V
IN(0)
Logical ‘‘0’’ Input Voltage V
CC
e
5V 1.5 V
V
CC
e
10V 2.0 V
V
OUT(1)
Logical ‘‘1’’ Output Voltage V
CC
e
5V, I
O
eb
10 mA 4.5 V
V
CC
e
10V, I
O
eb
10 mA 9.0 V
V
OUT(0)
Logical ‘‘0’’ Output Voltage V
CC
e
5V, I
O
ea
10 mA 0.5 V
V
CC
e
10V, I
O
ea
10 mA1V
I
IN(1)
Logical ‘‘1’’ Input Current V
CC
e
15V, V
IN
e
15V 0.005 1.0 mA
I
IN(0)
Logical ‘‘0’’ Input Current V
CC
e
15V, V
IN
e
0V
b
1.0
b
0.005 mA
I
CC
Supply Current (Standby) V
CC
e
15V, R
EXT
e %
,
0.05 300 mA
Q1, Q2
e
Logic ‘‘0’’ (Note 3)
I
CC
Supply Current V
CC
e
15V, Q1eLogic ‘‘1’’,
15 mA
(During Output Pulse) Q2
e
Logic ‘‘0’’
(Figure 4)
V
CC
e
5V, Q1eLogic ‘‘1’’,
2mA
Q2
e
Logic ‘‘0’’
(Figure 4)
Leakage Current at R/C
EXT
Pin V
CC
e
15V, V
CEXT
e
5V 0.01 3.0 mA
CMOS/LPTTL Interface
V
IN(1)
Logical ‘‘1’’ Input Voltage 54C V
CC
e
4.5V V
CC
b
1.5 V
74C V
CC
e
4.75V V
CC
b
1.5 V
V
IN(0)
Logical ‘‘0’’ Input Voltage 54C V
CC
e
4.5V 0.8 V
74C V
CC
e
4.75V 0.8 V
V
OUT(1)
Logical ‘‘1’’ Output Voltage 54C V
CC
e
4.5V, I
O
eb
360 mA 2.4 V
74C V
CC
e
4.75V, I
O
eb
360 mA 2.4 V
V
OUT(0)
Logical ‘‘0’’ Output Voltage 54C V
CC
e
4.5V, I
O
e
360 mA 0.4 V
74C V
CC
e
4.75V, I
O
e
360 mA 0.4 V
Output Drive (See 54C/74C Family Characteristics Data Sheet) (Short Circuit Current)
I
SOURCE
Output Source Current V
CC
e
5V
b
1.75 mA
(P-Channel) T
A
e
25§C, V
OUT
e
0V
I
SOURCE
Output Source Current V
CC
e
10V
b
8mA
(P-Channel) T
A
e
25§C, V
OUT
e
0V
I
SINK
Output Sink Current V
CC
e
5V
1.75 mA
(N-Channel) T
A
e
25§C, V
OUT
e
V
CC
I
SINK
Output Sink Current V
CC
e
10V
8mA
(N-Channel) T
A
e
25§C, V
OUT
e
V
CC
2
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