. LSI Logic - Index of

SERIES 54ALS/74ALS AND 54AS/74AS DEVICESPARAMETER MEASUREMENT INFORMATION7VVCC ~ RL = R1 = R2SlL~FROM OUTPUT;q- TEST FROM OUTPUT TESTUNDER TESTPOINTUNDER TEST POINT R1CL RL FROM OUTPUT TEST(See Note A) CL ---UNDER TEST ---41~---41~---41~- POINT'''', NOhAITCL R2(See Note A)LOAD CIRCUIT FORBI·STATETOTEM·POLE OUTPUTSNOTE A: CL includes probe and jig capacitance.TIMINGINPUT/>.3 V,- - - - - - -- 0.3 V~ tsu ....-th ~LOAD CIRCUIT FOROPEN·COLLECTOR OUTPUTS3.5V~3.5VDATAINPUT 1.3 V 1.3 V0.3VLOAD CIRCUIT FORTHREE·STATE OUTPUTSHIGH·LEVEL~ 3.5VPULSE I II I 0.3 V4-- tw -----.3.5 VLOW·LEVEL' 1 .3V1.3V ____PULSE 0.3Vc:o"';:COE~'to-oc:C6~Q)c:Q)(!)VOL TAGE WAVEFORMSSETUP AND HOLD TIMESVOL TAGE WAVEFORMSPULSE WIDTHSINPUT ~~.;V-- - 3.5V-/: I..>V .~ 0.3V~tPLH" j.tPHL"IN.PHASE~:I-:-- VOHOUTPUT : 1.3 V : 1.3 V, : VOLj4tPHL'"~tpLH'"OUT -OF·PHASE ~ 1 ., \I l/.:': VOHOUTPUT ~~.~V(See Note D) - - - VOLVOLTAGE WAVEFORMSPROPAGATION DELAY TIMESOUTPUTCONTROL 1.3 V 1.3 V3.5 V(low·level I -:-- - - ---- 0.3 Venabling) tpZL ___tel --tI It- tPLZI I I'I I I : '" 3.5 VWAVEFORM 1 --y\! 1.3 V i :~3 V1 --~~_LvSl CLOSED i ~.-------------=--=-!:iII.==-~= VOL(See Note B) tpZH -l..I I TWAVEFORM 2 I ----"l-- OHSl OPEN 1.3 V 0.3 V(See Note B)"'0 VVOLTAGE WAVEFORMSENABLE AND DISABLE TIMES, THREE·STATE OUTPUTSNOTES:B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.C. Ail input pulses have the following characteristics: PRR :$ 1 MHz, tr = tf = 2 ns, duty cycle = 50%.D. When measuring propagation delay times of 3·state outputs, switch S 1 is closed.TEXAS ..INSTRUMENTSPOST OFFICE BOX 225012 • DALLAS, TEXAS 752651-11