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74LVQ299 датащи(PDF) 2 Page - STMicroelectronics |
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74LVQ299 датащи(HTML) 2 Page - STMicroelectronics |
2 / 15 page 74LVQ299 2/15 Figure 2: Input And Output Equivalent Circuit Table 2: Pin Description Table 3: Truth Table * When one or both controls are high, the eight input/output terminals are the high impedance state: however sequential operation or cleaning of the register is not affected. Z: High Impedance Qn0: The level of An before the indicated steady state input conditions were established. Qnn: The level of Qn before the most recent active transition indicated by OR a, h: The level of the steady state inputs A, H, respectively. X: Don’t Care PIN N° SYMBOL NAME AND FUNCTION 1, 19 S0, S1 Mode Select Inputs 2, 3 G1, G2 3-State Output Enable Inputs (Active LOW) 7, 13, 6, 14, 5, 15, 4, 16 A/QA to H/QH Parallel Data Inputs or 3-State Parallel Outputs (Bus Driver) 8, 17 QA’,QH’ Serial Outputs (Standard Output) 9 CLEAR Asynchronous Master Reset Input (Active LOW) 11 SR Serial Data Shift Right Input 12 CLOCK Clock Input (LOW to HIGH, Edge-triggered) 18 SL Serial Data Shift Left Input 10 GND Ground (0V) 20 VCC Positive Supply Voltage MODE INPUTS INPUTS/OUTPUTS OUTPUTS CLEAR FUNCTION SELECTED OUTPUT CONTROL CLOCK SERIAL A/QA H/QH QA’ QH’ S1 S0 G1*G2*SL SR Z L HHX X X X X Z Z L L CLEAR L L X L L X X X LLL L L X L L L X X X LLL L HOLD H L L L L X X X QA0 QH0 QA0 QH0 SHIFT RIGHT H L H L L X H H QGn H QGn H L H L L X L L QGn L QGn SHIFT LEFT HH L L L H X QBn H QBn H HH L L L L X QBn L QBn L LOAD HHHX X X X a h a h |
Аналогичный номер детали - 74LVQ299 |
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Аналогичное описание - 74LVQ299 |
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