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HC123 の電気的特性と機能

HC123のメーカーはNational Semiconductorです、この部品の機能は「Dual Retriggerable Monostable Multivibrator」です。


製品の詳細 ( Datasheet PDF )

部品番号 HC123
部品説明 Dual Retriggerable Monostable Multivibrator
メーカ National Semiconductor
ロゴ National Semiconductor ロゴ 




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HC123 Datasheet, HC123 PDF,ピン配置, 機能
January 1988
MM54HC123A MM74HC123A
Dual Retriggerable Monostable Multivibrator
General Description
The MM54 74HC123A high speed monostable multivibra-
tors (one shots) utilize advanced silicon-gate CMOS tech-
nology 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 ’HC123 can be
triggered on the positive transition of the clear while A is
held low and B is held high
The ’HC123A is retriggerable That is it may be triggered
repeatedly while their 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-
Connection Diagram
Dual-In-Line Package
put pulse equation is simply PWe(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
Y Typical propagation delay 25 ns
Y Wide power supply range 2V – 6V
Y Low quiescent current 80 mA maximum (74HC Series)
Y Low input current 1 mA maximum
Y Fanout of 10 LS-TTL loads
Y Simple pulse width formula T e RC
Y Wide pulse range 400 ns to % (typ)
Y Part to part variation g5% (typ)
Y Schmitt Trigger A B inputs enable infinite signal input
rise and fall times
Timing Component
Note Pin 6 and Pin 14 must be
hard-wired to GND
TL F 5206 – 2
TL F 5206 – 1
Top View
Order Number MM54HC123A or MM74HC123A
Truth Table
Inputs
Clear A
LX
XH
XX
HL
Hv
uL
B
X
X
L
u
H
H
Outputs
QQ
LH
LH
LH
H e High Level
L e Low Level
u e Transition from Low to High
v e Transition from High to Low
e One High Level Pulse
e One Low Level Pulse
X e Irrelevant
C1995 National Semiconductor Corporation TL F 5206
RRD-B30M105 Printed in U S A

1 Page





HC123 pdf, ピン配列
AC Electrical Characteristics VCCe5V TAe25 C CLe15 pF tretfe6 ns
Symbol
Parameter
Conditions
Typ Limit
tPLH Maximum Trigger Propagation Delay
A B or Clear to Q
tPHL Maximum Trigger Propagation Delay
A B or Clear to Q
tPHL
tPLH
tW
tREM
tWQ MIN
tWQ
Maximum Propagation Delay Clear to Q
Maximum Propagation Delay Clear to Q
Minimum Pulse Width A B or Clear
Minimum Clear Removal Time
Minimum Output Pulse Width
Output Pulse Width
CEXTe pF
REXTe kX
CEXTe
pF
REXTe kX
Units
ns
ns
ns
ns
ns
ns
ns
ms
AC Electrical Characteristics CLe50 pF tretfe6 ns (unless otherwise specified)
Symbol
Parameter
Conditions
VCC
TAe25 C
74HC
TAeb40 to 85 C
54HC
TAeb55 to 125 C
Units
Typ Guaranteed Limits
tPLH
Maximum Trigger Propagation
Delay A B or Clear to Q
V
V
V
ns
ns
ns
tPHL
Maximum Trigger Propagation
Delay A B or Clear to Q
V
V
V
ns
ns
ns
tPHL
Maximum Propagation Delay
Clear to Q
V
V
V
ns
ns
ns
tPLH
Maximum Propagation Delay
Clear to Q
V
V
V
ns
ns
ns
tW Minimum Pulse Width
A B Clear
V
V
V
ns
ns
ns
tREM
Minimum Clear
Removal Time
V
V
V
ns
ns
ns
tTLH tTHL Maximum Output
Rise and Fall Time
V
V
V
ns
ns
ns
tWQ MIN Minimum Output
Pulse Width
tWQ Output Pulse Width
CEXTe pF
REXTe kX
REXTe kX VCCe V
CEXTe mF
REXTe kX
Min
Max
V
V
V
V
V
ms
ns
ns
ms
ms
CIN Maximum Input
Capacitance Pins
pF
CIN Maximum Input
Capacitance other inputs
pF
CPD Power Dissipation
Capacitance
Note
pF
Note 5 CPD determines the no load dynamic power consumption PD e CPD VCC2 f a ICC VCC and the no load dynamic current consumption IS e CPD
VCC f a ICC
3


3Pages


HC123 電子部品, 半導体
Physical Dimensions inches (millimeters)
Dual-In-Line Package (J)
Order Number MM54HC123AJ or MM74HC123AJ
NS Package Number J16A
Dual-In-Line Package (N)
Order Number MM74HC123AN
NS Package Number N16E
LIFE SUPPORT POLICY
NATIONAL’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 NATIONAL
SEMICONDUCTOR CORPORATION As used herein
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 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
2 A critical component is 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
National Semiconductor
Corporation
1111 West Bardin Road
Arlington TX 76017
Tel 1(800) 272-9959
Fax 1(800) 737-7018
National Semiconductor
Europe
Fax (a49) 0-180-530 85 86
Email cnjwge tevm2 nsc com
Deutsch Tel (a49) 0-180-530 85 85
English Tel (a49) 0-180-532 78 32
Fran ais Tel (a49) 0-180-532 93 58
Italiano Tel (a49) 0-180-534 16 80
National Semiconductor
Hong Kong Ltd
13th Floor Straight Block
Ocean Centre 5 Canton Rd
Tsimshatsui Kowloon
Hong Kong
Tel (852) 2737-1600
Fax (852) 2736-9960
National Semiconductor
Japan Ltd
Tel 81-043-299-2309
Fax 81-043-299-2408
National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications

6 Page



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