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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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74LS569 датащи(PDF) 2 Page - Motorola, Inc |
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74LS569 датащи(HTML) 2 Page - Motorola, Inc |
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2 / 8 page  5-574 FAST AND LS TTL DATA SN54/74LS569A FUNCTION TABLE INPUTS OUTPUTS CP D C B A LOAD CET CEP U/D ACLR SCLR OE RCO CCO YD YC YB YA ↑ X X X X H L L H H H L A/R A/R (QT – CP) + 1 Count Up ↑ X X X X H L L L H H L A/R A/R (QT – CP) – 1 Count Down ↑ X X X X H H X X H H L H H NC NC NC NC Count Inhibit ↑ X X X X H L H X H H L A/R H NC NC NC NC Count Inhibit Ω X X X X X L L H H H L L H H H H Overflow ↑ X X X X X L H H H H L L H H H H H Overflow ↑ X X X X X H X H H H L H H H H H H Overflow Inhibit X X X X X L L L H H L L L L L L Underflow ↑ X X X X X L H L H H L L H L L L L Underflow ↑ X X X X X H X L H H L H H L L L L Underflow Inhibit ↑ L H L H L X X X H H L H H L H L H Load Example ↑ X X X X X H X H H L L H H L L L L Clear (Synchronous) X X X X X L L L H L L L L L L L Clear (Synchronous) ↑ X X X X X L H L H L L L H L L L L Clear (Synchronous) ↑ X X X X X H X L H L L H H L L L L Clear (Synchronous) X X X X X X X X H L X L H H L L L L Asynchronous Clear X X X X X L L L L X L L L L L L Asynchronous Clear X X X X X X L H L L X L L H L L L L Asynchronous Clear X X X X X X H X L L X L H H L L L L Asynchronous Clear X X X X X X X X X X X H X X Hi-Z Output Disabled (QT — CP) = Output state prior to clock edge A/R = Assumes required output state; X = Don’t care NC = No change High except during Overflow and Underflow LOGIC DIAGRAM OE ACLR A B C SCLR LOAD CEP CET CP U/D YA YB YC YD RCO CCO * * * * D D R CP Q Q * |
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