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CA0555CM датащи(PDF) 3 Page - Harris Corporation |
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CA0555CM датащи(HTML) 3 Page - Harris Corporation |
3 / 6 page 8-5 Schematic Diagram Typical Applications Reset Timer (Monostable Operation) Figure 1 shows the CA555 connected as a reset timer. In this mode of operation capacitor CT is initially held discharged by a transistor on the integrated circuit. Upon closing the “start” switch, or applying a negative trigger pulse to terminal 2, the integral timer flip-flop is “set” and releases the short circuit across CT which drives the output voltage “high” (relay ener- gized). The action allows the voltage across the capacitor to increase exponentially with the constant t = R1CT. When the voltage across the capacitor equals 2/3 V+, the comparator resets the flip-flop which in turn discharges the capacitor rap- idly and drives the output to its low state. Output Rise Time tR - 100 - - 100 - ns Output Fall Time tF - 100 - - 100 - ns NOTES: 2. When the output is in a high state, the DC supply current is typically 1mA less than the low state value. 3. The threshold current will determine the sum of the values of R1 and R2 to be used in Figure 4 (astable operation); the maximum total R1 + R2 = 20MΩ. Electrical Specifications TA = 25 oC, V+ = 5V to 15V Unless Otherwise Specified (Continued) PARAMETER SYMBOL TEST CONDITIONS CA555, LM555 CA555C, LM555C, NE555 UNITS MIN TYP MAX MIN TYP MAX 6 THRESHOLD 7 RESET DISCHARGE V- RESET DISCHARGE 3 OUTPUT OUTPUT FLIP-FLOP TRIGGER COMPARATOR THRESHOLD COMPARATOR 4.7K 830 4.7K D2 D1 Q3 Q4 Q7 Q5 Q2 Q1 10K Q8 Q6 100 100K Q9 Q11 Q12 1K Q10 5K Q13 Q16 7K D3 Q14 Q15 Q17 3.9K Q19 Q20 Q21 Q18 8 V+ CONTROL VOLTAGE 5K 6.8K 5K 4.7K 220 4.7K 5 2 4 1 TRIGGER D4 NOTE: Resistance values are in ohms. CA555, CA555C, LM555, LM555C, NE555 |
Аналогичный номер детали - CA0555CM |
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Аналогичное описание - CA0555CM |
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