Fairchild Semiconductor MM74C221N Datasheet
MM74C221
Dual Monostable Multivibrator
MM74C221 Dual Monostable Multivibrator
November 1987
Revised January 1999
General Description
The MM74C221 dual monostable multivibrator is a monolithic complementary MOS integrated circuit. Each multivibrator features a negative-transit ion-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 ou tput pulses are independen t of further
transitions of the A a nd B input s and are a fu nction of t he
external timing components C
width is stable over a wide range of temperature and V
EXT
and R
. The pulse
EXT
Pulse stability will be limited by the accuracy of external
timing components. The pulse width is approximately
defined by the relati onship t
ther information and applications, see AN-138.
W(OUT)
≈ C
Features
■ Wide supply voltage range: 4.5V to 15V
■ Guaranteed noise margin: 1.0V
■ High noise immunity: 0.45 V
.
CC
■ Low power TTL compatibility: fan out of 2 driving 74L
CC
(typ.)
EXT REXT
Ordering Code:
Order Number Package Number Package Description
74MMC221N N16E 16-Lead Plastic Dual-in-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Connection Diagrams
Timing Component
Pin Assignments for DIP
Truth Table
Inputs Outputs
Clear A B Q Q
LX XLH
X HXLH
XXLLH
HL↑
H ↓ H
H = HIGH Level = One HIGH level pulse
L = LOW Level
↑ = Transition from LOW-to-HIGH X= I rrelevant
↓ = Transition from HIGH-to-LOW
= One LOW le vel pulse
. For fur-
Top View
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Absolute Maximum Ratings(Note 1)
Voltage at Any Pin −0.3V to VCC + 0.3V
Operating Temperature Range −40°C to +85°C
Storage Temperature Range −65°C to +150°C
MM74C221
Power Dissipation
Dual-In-Line 700 mW
Small Outline 500 mW
Operating V
Range 4.5V to 15V
CC
Absolute Maximum V
≥ 80 VCC (Ω)
R
EXT
CC
Lead Temperature
(Soldering, 10 seconds) 260°C
Note 1: “Absolute Maxi mum Ratings” are those valu es beyond which the
safety of the device cannot be guaranteed. Ex ce pt for “O perating Temperature Range” they are not mean t to imply that the devices sho uld be operated at these limits. The Electrical Charac t eristics table provides co nditions
for actual device operation.
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)
V
IN(0)
V
OUT(1)
V
I
IN(1)
I
IN(0)
I
CC
I
CC
CMOS/LPTTL Interface
V
IN(1)
V
IN(0)
V
OUT(1)
V
Output Drive (See Family Characteristics Data Sheet) (Short Circuit Current)
I
SOURCE
I
SOURCE
I
SINK
I
SINK
Note 2: In Standby (Q = Logic “0”) the power dissi pated equals the leakage current plus VCC/R
OUT(0)
OUT(0)
Logical “1” Input Voltage VCC = 5V 3.5 V
VCC = 10V 8.0 V
Logical “0” Input Voltage VCC = 5V 1.5 V
VCC = 10V 2.0 V
Logical “1” Output Voltage VCC = 5V, IO = −10 µA 4.5 V
VCC = 10V, IO = −10 µA 9.0 V
Logical “0” Output Voltage VCC = 5V, IO = +10 µA 0.5V
VCC = 10V, IO = +10 µA 1V
Logical “1” Input Current VCC = 15V, VIN = 15V 0.005 1.0 µA
Logical “0” Input Current VCC = 15V, VIN = 0V −1.0 −0.005 µA
Supply Current (Standby) VCC = 15V, R
= ∞, 0.05 300 µA
EXT
Q1, Q2 = Logic “0” (Note 2)
Supply Current VCC = 15V, Q1 = Logic “1”, 15 mA
(During Output Pulse) Q2 = Logic “0” (Figure 4)
VCC = 5V, Q1 = Logic “1”, 2 mA
Q2 = Logic “0” (Figure 4)
Leakage Current at R/C
Logical “1” Input Voltage V
Pin VCC = 15V, V
EXT
CC
= 5V 0.01 3.0 µA
CEXT
= 4.75V VCC − 1.5 V
Logical “0” Input Voltage VCC = 4.75V 0.8 V
Logical “1” Output Voltage V
= 4.75V, IO = −360 µA 2.4 V
CC
Logical “0” Output Voltage VCC = 4.75V, IO = 360 µA 0.4V
Output Source Current VCC = 5V −1.75 mA
(P-Channel) TA = 25°C, V
OUT
= 0V
Output Source Current VCC = 10V −8 mA
(P-Channel) TA = 25°C, V
OUT
= 0V
Output Sink Current VCC = 5V 1.75 mA
(N-Channel) TA = 25°C, V
OUT
= V
CC
Output Sink Current VCC = 10V 8 mA
(N-Channel) TA = 25°C, V
OUT
= V
CC
EXT
.
18V
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