74VHC123A ,Dual Retriggerable Monastable Multivibratorfeatures both a nega-tive, A, and a positive, B, transition triggered input, either of
74VHC123AMTC ,Dual Retriggerable Monastable MultivibratorGeneral Descriptionapplied to the input pins without regard to the supply volt-The VHC123A is an ad ..
74VHC123AMTCX ,Dual Retriggerable Monastable MultivibratorGeneral Descriptionapplied to the input pins without regard to the supply volt-The VHC123A is an ad ..
74VHC123AMX ,Dual Retriggerable Monastable MultivibratorGeneral Descriptionapplied to the input pins without regard to the supply volt-The VHC123A is an ad ..
74VHC123ASJ ,Dual Retriggerable Monastable MultivibratorFeaturesinput, either of which can be used as an inhibit input. Alsoincluded is a clear input that ..
74VHC123ASJX ,Dual Retriggerable Monastable MultivibratorFeaturesinput, either of which can be used as an inhibit input. Alsoincluded is a clear input that ..
88CNQ060A ,60V 80A Schottky Common Cathode Diode in a D61-8 packageBulletin PD-20058 rev. B 01/0288CNQ060A SeriesSCHOTTKY RECTIFIER 80 AmpNew GenIII D-61 Packag ..
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88E1040 , Alaska® Quad Gigabit Ethernet Transceivers
74VHC123A
Dual Retriggerable Monastable Multivibrator
TL/F/11621
74VHC123A
Dual
Retriggerable
Monostable
Multivibrator
October 1995
74VHC123A
Dual Retriggerable Monostable Multivibrator
General Description
The ’VHC123A isan advancedhighspeedCMOS Monosta-
ble Multivibrator fabricated with silicon gate CMOS technol-
ogy.It achievesthe high speed operation similarto equiva-
lent Bipolar SchottkyTTL while maintainingthe CMOSlow
power dissipation. Each multivibrator features botha nega-
tive,A,anda positive,B, transition triggered input, eitherof
which canbe usedasan inhibit input. Also includedisa
clear input that when takenlow resetsthe one-shot. The
’VHC123Acanbe triggeredonthe positive transitionofthe
clear whileAis held lowandBis held high. Theoutput pulse
widthis determinedbythe equation:PWe (Rx)(Cx); whereisin seconds,Risin ohms,andCisin farads.
LimitsforRxandCxare:
Externalcapacitor,Cx Nolimit
Externalresistors,Rx VCCe 2.0V, 5kXmin
VCCl 3.0V, 1kXmin input protection circuit ensuresthat0to7Vcanbeap-
pliedtothe input pins without regardtothe supply voltage.
This devicecanbe usedto interface5Vto3V systemsand
two supply systems suchas battery backup. This circuit
prevents device destructiondueto mismatched supplyand
input voltages.
Features Low Power Dissipation:
ICCe4mA (Max)atTAe 25§C Active State:ICCe 600mA (Max)atTAe 25§C High Noise Immunity: VNIHe VNILe 28% VCC (min)All inputsare equipped witha power down protection
function Balanced Propagation Delays: tPLHj tPHLPinand function compatible with 74HC123A
Commercial Package Package DescriptionNumber
74VHC123AM M16A 16-LeadMolded JEDEC SOIC
74VHC123ASJ M16D 16-LeadMolded EIAJSOIC
74VHC123AMSC MSC16 16-LeadMolded EIAJType 1SSOP
74VHC123AMTC MTC16 16-LeadMolded JEDEC TypeTSSOP
74VHC123AN N16E 16-LeadMoldedDIP
Note: Surface mount packagesarealso availableon TapeandReel. Specifyby appendingthe suffixletter‘‘X’’to theorderingcode.
EIAJType 1SSOP availableonTapeandReelonly, order MSCX.
Logic Symbol
IEEE/IEC
TL/F/11621–1
Connection Diagram
Pin Assignmentfor
DIP,SSOP, TSSOPand SOIC
TL/F/11621–2
C1995National SemiconductorCorporation RRD-B30M125/PrintedinU.S.A.
