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74VHC123AM Folha de dados(PDF) 1 Page - Fairchild Semiconductor

Nome de Peças 74VHC123AM
Descrição Electrónicos  Dual Retriggerable Monostable Multivibrator
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Fabricante Electrônico  FAIRCHILD [Fairchild Semiconductor]
Página de início  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74VHC123AM Folha de dados(HTML) 1 Page - Fairchild Semiconductor

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May 2007
©1993 Fairchild Semiconductor Corporation
www.fairchildsemi.com
74VHC123A Rev. 1.2
74VHC123A
Dual Retriggerable Monostable Multivibrator
Features
High Speed: tPD = 8.1ns (Typ.) at TA = 25°C
Low Power Dissipation: ICC = 4µA (Max) at TA = 25°C
Active State: ICC = 600µA (Max.) at TA = 25°C
High Noise Immunity: VNIH = VNIL = 28% VCC (Min.)
Power down protection is provided on all inputs
Pin and function compatible with 74HC123A
General Description
The VHC123A is an advanced high speed CMOS
Monostable Multivibrator fabricated with silicon gate
CMOS technology. It achieves the high speed operation
similar to equivalent Bipolar Schottky TTL while main-
taining the CMOS low power dissipation. Each multi-
vibrator features both a negative, A, and a positive, 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 VHC123A can be
triggered on the positive transition of the clear while A is
held low and B is held high. The output pulse width is
determined by the equation: PW
= (R
x)(Cx); where PW
is in seconds, R is in ohms, and C is in farads.
Limits for Rx and Cx are:
External capacitor, Cx: No limit
External resistors, Rx:VCC = 2.0V, 5 kΩ min
VCC > 3.0V, 1 kΩ min
An input protection circuit ensures that 0 to 7V can be
applied to the input pins without regard to the supply
voltage. This device can be used to interface 5V to 3V
systems and two supply systems such as battery back
up. This circuit prevents device destruction due to mis-
matched supply and input voltages.
Ordering Information
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the
ordering number.
Order Number
Package
Number
Package Description
74VHC123AM
M16A
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow
74VHC123ASJ
M16D
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHC123AMTC
MTC16
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm
Wide


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