Revised May 2002
MM74C221
Dual Monostable Multivibrator
General Description
Features
The 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.
■ Wide supply voltage range:
4.5V to 15V
■ Guaranteed noise margin: 1.0V
■ High noise immunity: 0.45 VCC (typ.)
■ Low power TTL compatibility: fan out of 2 driving 74L
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 CEXT and REXT. The pulse
width is stable over a wide range of temperature and VCC.
Pulse stability will be limited by the accuracy of external
timing components. The pulse width is approximately
defined by the relationship tW(OUT) ≈ CEXT REXT. For further information and applications, see AN-138.
Ordering Code:
Order Number
74MMC221N
Package Number
N16E
Package Description
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Connection Diagrams
Truth Table
Inputs
Timing Component
Outputs
Clear
A
B
Q
Q
L
X
X
L
H
X
H
X
L
H
X
X
L
H
L
↑
H
↓
H
H = HIGH Level
L = LOW Level
X= Irrelevant
↑ = Transition from LOW-to-HIGH
↓ = Transition from HIGH-to-LOW
= One HIGH Level Pulse
= One LOW Level Pulse
L
H
Top View
© 2002 Fairchild Semiconductor Corporation
DS005904
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MM74C221 Dual Monostable Multivibrator
November 1987
MM74C221
Absolute Maximum Ratings(Note 1)
Voltage at Any Pin
−0.3V to VCC + 0.3V
Operating Temperature Range
−55°C to +125°C
Storage Temperature Range
−65°C to +150°C
Power Dissipation
Dual-In-Line
700 mW
Small Outline
500 mW
Operating VCC Range
4.5V to 15V
Absolute Maximum VCC
Note 1: “Absolute Maximum Ratings” are those values beyond which the
safety of the device cannot be guaranteed. Except for “Operating Temperature Range” they are not meant to imply that the devices should be operated at these limits. The Electrical Characteristics table provides conditions
for actual device operation.
18V
REXT ≥ 80 VCC (Ω)
Lead Temperature
260°C
(Soldering, 10 seconds)
DC Electrical Characteristics
Max/min limits apply across temperature range, unless otherwise noted
Symbol
Parameter
Conditions
Min
Typ
Max
Units
CMOS to CMOS
VIN(1)
VIN(0)
VOUT(1)
VOUT(0)
Logical “1” Input Voltage
Logical “0” Input Voltage
Logical “1” Output Voltage
Logical “0” Output Voltage
VCC = 5V
3.5
VCC = 10V
8.0
V
VCC = 5V
1.5
VCC = 10V
2.0
VCC = 5V, IO = −10 µA
4.5
VCC = 10V, IO = −10 µA
9.0
V
VCC = 5V, IO = +10 µA
0.5
VCC = 10V, IO = +10 µA
1
IIN(1)
Logical “1” Input Current
VCC = 15V, VIN = 15V
IIN(0)
Logical “0” Input Current
VCC = 15V, VIN = 0V
ICC
Supply Current (Standby)
0.005
−1.0
VCC = 15V, REXT = ∞,
V
1.0
−0.005
0.05
V
µA
µA
300
µA
Q1, Q2 = Logic “0” (Note 2)
ICC
Supply Current
VCC = 15V, Q1 = Logic “1”,
(During Output Pulse)
Q2 = Logic “0” (Figure 4)
VCC = 5V, Q1 = Logic “1”,
15
mA
2
mA
Q2 = Logic “0” (Figure 4)
Leakage Current at R/CEXTPin
VCC = 15V, VCEXT = 5V
0.01
3.0
µA
0.8
V
CMOS/LPTTL Interface
VIN(1)
Logical “1” Input Voltage
V CC = 4.75V
VIN(0)
Logical “0” Input Voltage
VCC = 4.75V
VCC − 1.5
VOUT(1)
Logical “1” Output Voltage
V CC = 4.75V, IO = −360 µA
VOUT(0)
Logical “0” Output Voltage
VCC = 4.75V, IO = 360 µA
V
2.4
V
0.4
V
Output Drive (See Family Characteristics Data Sheet) (Short Circuit Current)
ISOURCE
ISOURCE
ISINK
ISINK
Output Source Current
VCC = 5V
(P-Channel)
TA = 25°C, VOUT = 0V
Output Source Current
VCC = 10V
(P-Channel)
TA = 25°C, VOUT = 0V
Output Sink Current
VCC = 5V
(N-Channel)
TA = 25°C, VOUT = VCC
Output Sink Current
VCC = 10V
(N-Channel)
TA = 25°C, VOUT = VCC
Note 2: In Standby (Q = Logic “0”) the power dissipated equals the leakage current plus VCC/REXT.
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2
−1.75
mA
−8
mA
1.75
mA
8
mA
(Note 3)
TA = 25°C, CL = 50 pF, unless otherwise noted
Symbol
tpd A, B
tpd CL
tS
tW(A, B)
tW(CL)
tW(OUT)
Typ
Max
Propagation Delay from Trigger
Parameter
VCC = 5V
Conditions
Min
250
500
Input (A, B) to Output Q, Q
VCC = 10V
120
250
Propagation Delay from Clear
VCC = 5V
250
500
Input (CL) to Output Q, Q
VCC = 10V
120
250
Time Prior to Trigger Input (A, B)
VCC = 5V
150
50
that Clear must be Set
VCC = 10V
60
20
Trigger Input (A, B) Pulse Width
VCC = 5V
150
50
VCC = 10V
70
30
VCC = 5V
150
50
VCC = 10V
70
30
Clear Input (CL) Pulse Width
Q or Q Output Pulse Width
VCC = 5V, REXT = 10k,
Units
ns
ns
ns
ns
ns
900
ns
350
ns
320
ns
CEXT = 0 pF
VCC = 10V, REXT = 10k,
CEXT = 0 pF
VCC = 15V, REXT = 10k,
CEXT = 0 pF
VCC = 5V, REXT = 10k,
9.0
10.6
12.2
µs
9.0
10
11
µs
8.9
9.8
10.8
µs
900
1020
1200
µs
900
1000
1100
µs
900
990
1100
µs
CEXT = 1000 pF (Figure 1)
VCC = 10V, REXT = 10k,
CEXT = 1000 pF (Figure 1)
VCC = 15V, REXT = 10k,
CEXT = 1000 pF (Figure 1)
VCC = 5V, REXT = 10k,
CEXT = 0.1 µF (Figure 3)
VCC = 10V, REXT = 10k,
CEXT = 0.1 µF (Figure 3)
VCC = 15V, REXT = 10k,
CEXT = 0.1 µF (Figure 3)
RON
ON Resistance of Transistor
VCC = 5V (Note 4)
50
150
between R/C EXT to CEXT
VCC = 10V (Note 4)
25
65
VCC = 15V (Note 4)
16.7
45
Output Duty Cycle
R = 10k, C = 1000 pF
90
R = 10k, C = 0.1 µF
90
Ω
%
(Note 5)
CIN
Input Capacitance
R/CEXT Input (Note 6)
15
Any Other Input (Note 6)
5
25
pF
Note 3: AC Parameters are guaranteed by DC correlated testing.
Note 4: See AN-138 for detailed explanation RON.
Note 5: Maximum output duty cycle = REXT/REXT + 1000.
Note 6: Capacitance is guaranteed by periodic testing.
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MM74C221
AC Electrical Characteristics
MM74C221
Typical Performance Characteristics
0% Point pulse width:
0% Point pulse width:
At VCC = 5V,
At VCC = 5V,
TW = 10.6 µs
TW = 1020 µs
At VCC = 10V,TW = 10 µs
At VCC = 10V,TW = 1000 µs
At VCC = 15V,TW = 9.8 µs
At VCC = 15V,TW = 982 µs
Percentage of units within +4%:
Percentage of units within +4%:
At VCC = 5V,90% of units
At VCC = 5V,95% of units
At VCC = 10V,95% of units
At VCC = 10V,97% of units
At VCC = 15V,98% of units
At VCC = 15V,98% of units
FIGURE 1. Typical Distribution of Units for Output
Pulse Width
FIGURE 3. Typical Distribution of Units for Output
Pulse Width
FIGURE 2. Typical Variation in Output Pulse Width vs
Temperature
FIGURE 4. Typical Power Dissipation per Package
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MM74C221
Typical Performance Characteristics
Switching Time Waveforms
(Continued)
tr = tf = 20 ns
5
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MM74C221 Dual Monostable Multivibrator
Physical Dimensions inches (millimeters) unless otherwise noted
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Package Number N16E
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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