74VHC393 ,Dual 4-Bit Binary Counter
74VHC393 ,Dual 4-Bit Binary Counter74VHC393Dual4-BitBinaryCounterNovember199574VHC393Dual4-BitBinaryCounterGeneralDescription
74VHC393 ,Dual 4-Bit Binary Counter
74VHC393 ,Dual 4-Bit Binary Counter
74VHC393MTC ,Dual 4-Bit Binary Counter74VHC393 Dual 4-Bit Binary CounterMarch 1993Revised February 200574VHC393Dual 4-Bit Binary Countera ..
74VHC393MTCX ,Dual 4-Bit Binary CounterGeneral Descriptionand two supply systems such as battery back up. This cir-The VHC393 is an advanc ..
74VHC393
Dual 4-Bit Binary Counter
TL/F/11571
74VHC393
Dual
4-Bit
Binary
Counter
November 1995
74VHC393
Dual 4-Bit Binary Counter
General Description
The ’VHC393isan advanced high speed CMOS 4-bit Binary
Counter fabricated with silicon gate C2MOS technology.It
achievesthe high speed operation similarto equivalentBi-
polar Schottky TTL while maintainingthe CMOSlow power
dissipation.It containstwo indepedent counter circuitsin
one package,so that countingor frequency divisionof8
binarybitscanbe achieved withoneIC. This device chang- stateonthe negative going transitionofthe CLOCK
pulse. Thecountercanbe resetto‘‘0’’(Q0–Q3e ‘‘L’’)bya
highatthe CLEAR input regardlessof other inputs. input protection circuit ensures that0Vto7Vcanbe
appliedtothe input pins without regardtothe supply volt-
age. This devicecanbe usedto interface5Vto3V systems
and twosupply systemssuchas batterybackup. This circuit
prevents device destructiondueto mismatched supplyand
input voltages.
Features Low power dissipation:ICCe4mA (max)ate 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 74HC393
Commercial Package PackageDescriptionNumber
74VHC393M M14B 14-Lead Molded JEDEC SOIC
74VHC393SJ M14D 14-Lead Molded EIAJ SOIC
74VHC393MSC MSC14 14-Lead Molded EIAJ Type1 SSOP
74VHC393MTC MTC14 14-Lead Molded JEDEC Type1 TSSOP
74VHC393N N14A 14-Lead MoldedDIP
Note:Surface mountpackagesare alsoavailableonTape andReel.Specify byappendingthesuffixletter
‘‘X’’tothe orderingcodeEIAJType1 SSOP availableon Tapeand Reelonly, orderMSCX.
Logic Symbol
IEEE/IEC
TL/F/11571–1
Connection Diagram
Pin Assignmentfor
DIP, SSOP, TSSOPand SOIC
TL/F/11571–2
Pin Description
Pin Names Description
CLR1, CLR2 Clear Inputs
CP1,CP2 ClockPulse Inputs
QA,QB,QC,QD Outputs
C1995National SemiconductorCorporation RRD-B30M125/PrintedinU.S.A.
