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MC74F269DW-MC74F269N
8-BIT BIDIRECTIONAL BINARY COUNTER
MC74F2698-BIT BIDIRECTIONALBINARY COUNTERThe MC74F269 is a fully synchronous 8-stage up/down counter featuringa preset capability for programmable operation, carry look-ahead for easycascading and a U/D input to control the direction of counting. All state8-BIT BIDIRECTIONALchanges, whether in counting or parallel loading, are initiated by the risingBINARY COUNTERedge of the clock.FAST SCHOTTKY TTL• Synchronous Counting and Loading• Built-In Lookahead Carry Capability• Count Frequency 115 MHz Typical• Supply Current 95 mA TypicalPIN ASSIGNMENTPE P P P P V P P P P TC CET0 1 2 3 CC 4 5 6 724 23 22 21 20 19 18 17 16 15 14 1324J SUFFIX1CERAMICCASE 758-011 2 3 4 5 6 7 8 9 10 11 12U/D Q Q Q Q Q GND Q Q Q CP CEP0 1 2 3 4 5 6 7 N SUFFIX24PLASTIC1CASE 724-03DW SUFFIX24SOIC1 CASE 751E-03ORDERING INFORMATIONMC74FXXXJ CeramicMC74FXXXN PlasticMC74FXXXDW SOICGUARANTEED OPERATING RANGESSymbol Parameter Min Typ Max UnitV Supply Voltage 74 4.5 5.0 5.5 VCCT Operating Ambient Temperature Range 74 0 25 70 °CAI Output Current High 74 –1.0 mAOHI Output Current Low 74 20 mAOLFAST AND LS TTL DATA4-138MC74F269FUNCTION TABLEInputs OutputsOperating Mode CP U/D CEP CET PE P Q TCn n↑ ↑ X X X X X X ll ll L L (a) (a)Parallel Load Parallel Load↑ ↑ X X X X X X ll h h H H (a) (a)Count Up ↑ h l l h X Count Up (a)Count Down ↑ l l l h X Count Down (a)Hold Hold ↑ ↑ X X h h X X h h X X q q (a) (a)n nDo Nothing Do Nothing ↑ ↑ X X X X h h h h X X q q H Hn nH = HIGH voltage level steady stateh = HIGH voltage level one set-up time prior to the LOW-to-HIGH clock transitionL = LOW voltage level steady statel = LOW voltage level one set-up time prior to the LOW-to-HIGH clock transitionX = Don’t careq = Lower case letters indicate the state of the referenced output prior to the LOW-to-HIGH clock transition↑ = LOW-to-HIGH clock transition(a) = The TC is LOW when CET is LOW and the counter is at Terminal Count. Terminal Count Up is with all Q outputs HIGH and Terminal Count Down is with alln(a) = Q outputs LOW.nDC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (Unless otherwise specified)LimitsSymbol Symbol Parameter Parameter Min Typ Max Unit Unit T Test Conditions est Conditions2.5 V = 4.5 VCCV V Output HIGH V Output HIGH Voltage oltage 74 74 V V II = –1.0 mA = –1.0 mAO OH H O OH H2.7 3.4 V = 4.75 VCCV Output LOW Voltage 74 0.35 0.5 V I = 20 mA, V = 4.5 VOL OL CCV Input Clamp Diode Voltage –1.2 V V = MIN, I = –18 mAIK CC IN100 V = 7.0 VINII Input HIGH Current Input HIGH Current μ μA A V V = MAX = MAXIIH H C CC C20 V = 2.7 VINI Input LOW Current –0.6 mA V = MAX, V = 0.5 VIL CC INI Output Short Circuit Current (Note 2) –60 –150 mA V = MAX, V = 0 VOS CC OUTI 93 120 (Note 3)CCHII T Total Supply Current (total) otal Supply Current (total) mA mA V V = MAX = MAXC CC C C CC CI 98 125 (Note 4)CCLNOTES:1. For conditions shown as MIN or MAX, use the appropriate value specified under guaranteed operating conditions for the applicable device type.2. Not more than one output should be shorted at a time, nor for more than 1 second.3. PE = CET = CEP = U/D = GND: P = 4.5 V: CP = ↑n4. PE = CET = CEP = U/D = GND: CP = ↑FAST AND LS TTL DATA4-139MC74F269
