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74VHCT273AT Datasheet(PDF) 4 Page - STMicroelectronics |
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74VHCT273AT Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 9 page CAPACITIVE CHARACTERISTICS Symb ol Parameter T est Cond ition s Val ue Un it TA =25 oC -40 to 85 oC Min. Typ . Max. Min . Max. CIN Input Capacitance 4 10 10 pF CPD Power Dissipation Capacitance (note 1) 15 pF 1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN +ICC/8 (per Flip-Flop) AC ELECTRICAL CHARACTERISTICS (Input tr =tf =3 ns) Symb ol Parameter Test Co nditi on Val ue Un it VCC (V) CL (pF ) TA =25 oC -40 to 85 oC Min. Typ . Max. Min . Max. tPLH tPHL Propagation Delay Time CK to Q 5.0 (*) 15 5.6 8.2 1.0 10.0 ns 5.0 (*) 50 6.3 9.2 1.0 11.0 tPHL Propagation Delay Time CLR to Q 5.0 (*) 15 6.9 10.0 1.0 11.6 ns 5.0 (*) 50 7.7 11.0 1.0 12.6 tw CLR pulse Width LOW 5.0 (*) 5.0 5.0 ns tw CK pulse Width HIGH or LOW 5.0 (*) 5.0 5.0 ns ts Setup Time D to CK HIGH or LOW 5.0 (*) 2.0 2.0 ns th Hold Time D to CK HIGH or LOW 5.0 (*) 2.0 2.0 ns tREM Removal Time CLR to CK 5.0 (*) 1.0 1.0 ns fMAX Maximum Clock Frequency 5.0 (*) 15 75 170 65 MHz 5.0 (*) 50 50 160 45 tOSLH tOSHL Output to Output Skew Time (note 1) 5.0 (*) 50 1.0 1.0 ns (*) Voltage range is 5V ± 0.5V Note 1: Parameter guaranteed by design. tsoLH =|tpLHm-tpLHn|, tsoHL =|tpHLm -tpHLn| DYNAMIC SWITCHING CHARACTERISTICS Symb ol Parameter T est Cond ition s Val ue Un it VCC (V) TA =25 oC -40 to 85 oC Min. Typ . Max. Min . Max. VOLP Dynamic Low Voltage Quiet Output (note 1, 2) 5.0 CL =50 pF 0.6 0.9 V VOLV -0.9 -0.6 VIHD Dynamic High Voltage Input (note 1, 3) 5.0 2.0 VILD Dynamic Low Voltage Input (note 1, 3) 5.0 0.8 1) Worst case package. 2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.0V, (n -1) outputs switching and one output at GND. 3) Max number of data inputs (n) switching. (n-1) switching 0V to3.0V. Inputs under test switching: 3.0V to threshold (VILD), 0V to threshold (VIHD), f=1MHz. 74VHCT273A 4/9 |
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