54LS193/DM54LS193/DM74LS193 Synchronous 4 …

1 TL/F/640654LS193/ dm54ls193 / dm74ls193 Synchronous 4-Bit Up/Down Counters with Dual ClockJune 198954LS193/ dm54ls193 / dm74ls193 Synchronous 4-Bit Up/Down BinaryCounters with Dual ClockGeneral DescriptionThis circuit is a Synchronous up/down 4-bit binary operation is provided by having all flip-flopsclocked simultaneously, so that the outputs change togeth-er when so instructed by the steering logic. This mode ofoperation eliminates the output counting spikes normally as-sociated with asynchronous (ripple-clock) outputs of the four master-slave flip-flops are triggeredby a low-to-high level transition of either count (clock) direction of counting is determined by which count inputis pulsed while the other count input is held counter is fully programmable; that is, each output maybe preset to either level by entering the desired data at theinputs while the load input is low. The output will changeindependently of the count pulses.

2 This feature allows thecounters to be used as modulo-N dividers by simply modify-ing the count length with the preset clear input has been provided which, when taken to a highlevel, forces all outputs to the low level; independent of thecount and load inputs. The clear, count, and load inputs arebuffered to lower the drive requirements of clock drivers,etc., required for long counters were designed to be cascaded without theneed for external circuitry. Both borrow and carry outputsare available to cascade both the up and down countingfunctions. The borrow output produces a pulse equal inwidth to the count down input when the counter , the carry output produces a pulse equal in width tothe count down input when an overflow condition counters can then be easily cascaded by feeding theborrow and carry outputs to the count down and count upinputs respectively of the succeeding independent clear inputYSynchronous operationYCascading circuitry provided internallyYIndividual preset each flip-flopYAlternate Military/Aerospace device ( 54ls193 ) is avail-able.

3 Contact a National Semiconductor Sales Office/Distributor for DiagramDual-In-Line PackageTL/F/6406 1 Order Number 54ls193 DMQB, 54ls193 FMQB, 54ls193 LMQB,DM54LS193J, DM54LS193W, DM74LS193M or dm74ls193 NSee NS Package Number E20A, J16A, M16A, N16E or W16AC1995 National Semiconductor CorporationRRD-B30M105/Printed in U. S. Maximum Ratings(Note)If Military/Aerospace specified devices are required,please contact the National Semiconductor SalesOffice/Distributors for availability and Voltage7 VInput Voltage7 VOperating Free Air Temperature RangeDM54LS and 54 LSb55 Ctoa125 CDM74LS0 Ctoa70 CStorage Temperature Rangeb65 Ctoa150 CNote:The Absolute Maximum Ratings are those valuesbeyond which the safety of the device cannot be guaran-teed. The device should not be operated at these limits. Theparametric values defined in the Electrical Characteristics table are not guaranteed at the absolute maximum Recommended Operating Conditions table will definethe conditions for actual device Operating ConditionsSymbolParameterDM54LS193DM74LS 193 UnitsMinNomMaxMinNomMaxVCCS upply Level Input Voltage22 VVILLow Level Input Level Output Level Output Current48mAfCLKC lock Frequency (Note 1)025025 MHzClock Frequency (Note 2)020020 MHztWPulse Width of Any Input (Note 6)2020nstSUData Setup Time (Note 6)2020nstHData Hold Time (Note 6)00nstRELR elease Time (Note 6)4040nsTAFree Air Operating Temperatureb55125070 CElectrical Characteristicsover recommended operating free air temperature range (unless otherwise noted)SymbolParameterConditionsMinTypMax Units(Note 3)

4 VIInput Clamp VoltageVCCeMin, IIeb18 Level OutputVCCeMin, , Level OutputVCCeMin, , mA, Current@MaxVCCeMax, VoltageIIHHigh Level Input CurrentVCCeMax, Level Input CurrentVCCeMax, CircuitVCCeMaxDM54b20b100mAOutput Current(Note 4)DM74b20b100 ICCS upply CurrentVCCeMax (Note 5)1934mANote 1:CLe15 pF, RLe2kX,IAe25 C and 2:CLe50 pF, RLe2kX,IAe25 C and 3:All typicals are at VCCe5V, TAe25 4:Not more than one output should be shorted at a time, and the duration should not exceed one 5:ICCis measured with all outputs open, CLEAR and LOAD inputs grounded, and all other inputs at 6:TAe25 C and Characteristicsat VCCe5V and TAe25 C (See Section 1 for Test Waveforms and Output Load)RLe2kXSymbolParameterFrom (Input)UnitsTo (Output)CLe15 pFCLe50 pFMinMaxMinMaxfMAXM aximum Clock Frequency2520 MHztPLHP ropagation Delay TimeCount Up2630nsLow to High Level Outputto CarrytPHLP ropagation Delay TimeCount Up2436nsHigh to Low Level Outputto CarrytPLHP ropagation Delay TimeCount Down2429nsLow to High Level Outputto BorrowtPHLP ropagation Delay TimeCount Down2432nsHigh to Low Level Outputto BorrowtPLHP ropagation Delay TimeEither Count3845nsLow to High Level Outputto Any QtPHLP ropagation Delay TimeEither Count4754nsHigh to Low Level Outputto Any QtPLHP ropagation Delay TimeLoad to4041nsLow to High Level OutputAny QtPHLP ropagation Delay TimeLoad to4047nsHigh to Low Level OutputAny QtPHLP ropagation Delay TimeClear to3544nsHigh to Low Level OutputAny Q3 Logic DiagramTL/F/6406 24 Timing DiagramsTypical Clear, Load, and Count SequencesTL/F/6406 3 Note A:Clear overrides load, data, and count B:When counting up, count-down input must be high.

5 When counting down, count-up input must be Dimensionsinches (millimeters)Ceramic Leadless Chip Carrier Package (E)Order Number 54ls193 LMQBNS Package Number E20A16-Lead Ceramic Dual-In-Line Package (J)Order Number 54ls193 DMQB or dm54ls193 JNS Package Number J16A6 Physical Dimensionsinches (millimeters) (Continued)16-Lead Small Outline Molded Package (M)Order Number dm74ls193 MNS Package Number M16A16-Lead Molded Dual-In-Line Package (N)Order Number dm74ls193 NNS Package Number N16E754LS193/ dm54ls193 / dm74ls193 Synchronous 4-Bit Up/Down Counters with Dual ClockPhysical Dimensionsinches (millimeters) (Continued)16-Lead Ceramic Flat Package (W)Order Number 54ls193 FMQB or dm54ls193 WNS Package Number W16 ALIFE SUPPORT POLICYNATIONAL S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORTDEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONALSEMICONDUCTOR CORPORATION.

6 As used herein:1. Life support devices or systems are devices or 2. A critical component is any component of a lifesystems which, (a) are intended for surgical implantsupport device or system whose failure to perform caninto the body, or (b) support or sustain life, and whosebe reasonably expected to cause the failure of the lifefailure to perform, when properly used in accordancesupport device or system, or to affect its safety orwith instructions for use provided in the labeling, reasonably expected to result in a significant injuryto the SemiconductorNational SemiconductorNational SemiconductorNational SemiconductorCorporationEuropeHong Kong West Bardin RoadFax: (a49) 0-180-530 85 8613th Floor, Straight Block,Tel: 81-043-299-2309 Arlington, TX 76017 Email: Centre, 5 Canton : 81-043-299-2408 Tel: 1(800) 272-9959 Deutsch Tel: (a49) 0-180-530 85 85 Tsimshatsui, KowloonFax: 1(800) 737-7018 English Tel: (a49) 0-180-532 78 32 Hong KongFran3ais Tel.

7 (a49) 0-180-532 93 58 Tel: (852) 2737-1600 Italiano Tel: (a49) 0-180-534 16 80 Fax: (852) 2736-9960 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.