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Systèmes élec. & informatiques (MESISI120424)
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Quelle est la formule pour calculer la température en degrés Celsius à partir de la tension de sortie du TMP36 ?
Le circuit intégrés 74 HC4051:
choisir le ou les affirmations correctes:
The 74HC74 is dual positive edge triggered D-type flip-flop. They have individual data (nD), clock (nCP), set (nSD) and reset (nRD) inputs, and complementary nQ and nQ outputs. Data at the nD-input, that meets the set-up and hold time requirements on the LOW-to-HIGH clock transition, is stored in the flip-flop and appears at the nQ output.
Quelle affirmation est fausse?
Quelle (es) affirmation (s) est (sont) vraie (s)?
74HC393, quelle (es) affirmation (s) est fausse (s) ?
The 74HC/HCT393 are 4-bit binary ripple counters with separate clocks (1CP and 2 CP) and master reset (1MR and 2MR) inputs to each counter. The operation of each half of the "393" is the same as the "93" except no externalclock connections are required.The counters are triggered by a HIGH-to-LOW transition of the clock inputs. The counter outputs are internally connected to provide clock inputs to succeeding stages.
Comment peut-on limiter le compteur 74HC393 à compter uniquement de 0 à 3, puis le faire recommencer automatiquement ?
Le circuit intégrés 74 HC4051:
choisir le ou les affirmations correctes:
Comment peut-on utiliser le composant 74HC393 pour compter jusqu'à 255?
La tension moyenne d'un signal PWM ayant un rapport cyclique de 20% et une amplitude Vcc=10V est:
74HC393, quelle (es) affirmation (s) est fausse (s) ?
The 74HC/HCT393 are 4-bit binary ripple counters with separate clocks (1CP and 2 CP) and master reset (1MR and 2MR) inputs to each counter. The operation of each half of the "393" is the same as the "93" except no externalclock connections are required.The counters are triggered by a HIGH-to-LOW transition of the clock inputs. The counter outputs are internally connected to provide clock inputs to succeeding stages.