データシートサーチシステム |
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DM74LS194AN データシート(PDF) 3 Page - National Semiconductor (TI) |
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DM74LS194AN データシート(HTML) 3 Page - National Semiconductor (TI) |
3 / 8 page Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) From (Input) 54LS DM74LS Symbol Parameter To (Output) CL e 15 pF CL e 50 pF Units RL e 2kX Min Max Min Max fMAX Maximum Clock 30 20 MHz Frequency tPLH Propagation Delay Time Clock to 21 26 ns Low to High Level Output Any Q tPHL Propagation Delay Time Clock to 24 35 ns High to Low Level Output Any Q tPHL Propagation Delay Time Clear to 26 38 ns High to Low Output Any Q Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 Not more than one output should be shorted at a time and the duration should not exceed one second Note 3 With all outputs open inputs A through D grounded and 45V applied to S0 S1 CLEAR and the serial inputs ICC is tested with momentary ground then 45V applied to CLOCK Logic Diagram LS194A TLF6407 – 2 Function Table Inputs Outputs Clear Mode Clock Serial Parallel QA QB QC QD S1 S0 Left Right A B C D L X X X X X XXXX L L L L H X X L X X XXXX QA0 QB0 QC0 QD0 HH H u XX a b c d a b c d HL H u X H XXXX H QAn QBn QCn HL H u X L XXXX L QAn QBn QCn HH L u H X XXXX QBn QCn QDn H HH L u L X XXXX QBn QCn QDn L H L L X X X XXXX QA0 QB0 QC0 QD0 H e High Level (steady state) L e Low Level (steady state) X e Don’t Care (any input including transitions) u e Transition from low to high level a b c d e The level of steady state input at inputs A B C or D respectively QA0 QB0 QC0 QD0 e The level of QA QB QC orQD respectively before the indicated steady state input conditions were established QAn QBn QCn QDn e The level of QA QB QC respectively before the most-recent u transition of the clock 3 |
同様の部品番号 - DM74LS194AN |
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同様の説明 - DM74LS194AN |
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