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PDF MM74HC423AM Data sheet ( Hoja de datos )
| Número de pieza | MM74HC423AM | |
| Descripción | Dual Retriggerable Monostable Multivibrator | |
| Fabricantes | Fairchild | |
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September 1983
Revised February 1999
MM74HC423A
Dual Retriggerable Monostable Multivibrator
General Description
The 74HC423A high speed monostable multivibrators (one
shots) utilize advanced silicon-gate CMOS technology.
They feature speeds comparable to low power Schottky
TTL circuitry while retaining the low power and high noise
immunity characteristic of CMOS circuits.
Each multivibrator features both a negative, A, and a posi-
tive, B, transition triggered input, either of which can be
used as an inhibit input. Also included is a clear input that
when taken LOW resets the one shot. The MM74HC423A
cannot be triggered from clear.
The MM74HC423A is retriggerable. That is, it may be trig-
gered repeatedly while its outputs are generating a pulse
and the pulse will be extended.
Pulse width stability over a wide range of temperature and
supply is achieved using linear CMOS techniques. The out-
put pulse equation is simply: PW = (REXT) (CEXT); where
PW
is in seconds, R is in ohms, and C is in farads. All inputs
are protected from damage due to static discharge by
diodes to VCC and ground.
Features
s Typical propagation delay: 40 ns
s Wide power supply range: 2V–6V
s Low quiescent current: 80 µA maximum (74HC Series)
s Low input current: 1 µA maximum
s Fanout of 10 LS-TTL loads
s Simple pulse width formula T = RC
s Wide pulse range: 400 ns to ∞ (typ)
s Part to part variation: ±5% (typ)
s Schmitt Trigger A & B inputs allow infinite rise and fall
times on these inputs
Ordering Code:
Order Number Package Number
Package Description
MM74HC423AM
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow
MM74HC423ASJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MM74HC423AMTC
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
MM74HC423AN
N16E
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagrams
Pin Assignments for DIP, SOIC, SOP and TSSOP
Timing Component
Top View
Note: Pin 6 and Pin 14 must be hard-wired to GND.
© 1999 Fairchild Semiconductor Corporation DS005338.prf
www.fairchildsemi.com
1 page  
Absolute Maximum Ratings(Note 1)
(Note 2)
Supply Voltage (VCC)
DC Input Voltage (VIN)
DC Output Voltage (VOUT)
Clamp Diode Current (IIK, IOK)
DC Output Current, per pin (IOUT)
DC VCC or GND Current,
per pin (ICC)
Storage Temperature Range (TSTG)
Power Dissipation (PD)
(Note 3)
S.O. Package only
Lead Temperature (TL)
(Soldering 10 seconds)
−0.5V to +7.0V
−1.5V to VCC +1.5V
−0.5V to VCC +0.5V
±20 mA
±25 mA
±50 mA
−65°C to +150°C
600 mW
500 mW
260°C
Recommended Operating
Conditions
Min Max Units
Supply Voltage (VCC)
DC Input or Output Voltage
(VIN, VOUT)
Operating Temperature Range (TA)
Maximum Input Rise and Fall Time
26
0 VCC
−40 +85
V
V
°C
(Clear Input)
VCC = 2.0V
1000 ns
VCC = 4.5V
500 ns
VCC = 6.0V
400 ns
Note 1: Maximum Ratings are those values beyond which damage to the
device may occur.
Note 2: Unless otherwise specified all voltages are referenced to ground.
Note 3: Power Dissipation Temperature Derating: Plastic “N” Package: −
12mW/°C from 65°C to 85°C.
DC Electrical Characteristics (Note 4)
Symbol
Parameter
Conditions
VCC
TA = 25°C
TA = −40 to 85°C TA = −55 to 125°C
Units
Typ Guaranteed Limits
VIH Minimum HIGH Level
Input Voltage
2.0V
4.5V
1.5
3.15
1.5
3.15
1.5
3.15
V
V
6.0V
4.2 4.2
4.2 V
VIL Maximum LOW Level
Input Voltage
2.0V
4.5V
0.3 0.3
0.9 0.9
0.3 V
0.9 V
6.0V
1.2 1.2
1.2 V
VOH Minimum HIGH Level
Output Voltage
VIN = VIH or VIL
|IOUT| ≤ 20 µA
2.0V
4.5V
2.0
4.5
1.9
4.4
1.9
4.4
1.9 V
4.4 V
6.0V
6.0
5.9
5.9
5.9 V
VOL Maximum LOW Level
Output Voltage
VIN = VIH or VIL
|IOUT| ≤ 4.0 mA
|IOUT| ≤ 5.2 mA
VIN = VIH or VIL
|IOUT| ≤ 20 µA
4.5V
6.0V
2.0V
4.5V
0
0
3.96
5.46
0.1
0.1
3.84
5.34
0.1
0.1
V
3.7 V
5.2 V
0.1 V
0.1 V
6.0V
0
0.1
0.1
0.1 V
VIN = VIH or VIL
|IOUT| ≤ 4 mA
|IOUT| ≤ 5.2 mA
IIN
Maximum Input Current
VIN = VCC or GND
(Pins 7, 15)
4.5V
6.0V
5.0V
0.26
0.26
0.5
0.33
0.33
5.0
V
0.4 V
0.4 V
5.0 µA
IIN
Maximum Input Current
VIN = VCC or GND
(all other pins)
6.0V
±0.1
±1.0
±1.0
µA
ICC Maximum Quiescent
VIN = VCC or GND
Supply Current (standby) IOUT = 0 µA
ICC
Maximum Active Supply
VIN = VCC or GND
Current (per
R/CEXT = 0.5VCC
monostable)
6.0V
2.0V
4.5V
6.0V
36
0.33
0.7
8.0
80
1.0
2.0
80
110
1.3
2.6
160 µA
130 µA
1.6 mA
3.2 mA
Note 4: For a power supply of 5V ±10% the worst-case output voltages (VOH, VOL) occur for HC at 4.5V. Thus the 4.5V values should be used when design-
ing with this supply. Worst-case VIH and VIL occur at VCC = 5.5V and 4.5V respectively. (The VIH value at 5.5V is 3.85V.) The worst-case leakage current
(IIN, ICC, and IOZ) occur for CMOS at the higher voltage and so the 6.0V values should be used.
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| PDF Descargar | [ Datasheet MM74HC423AM.PDF ] | |
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