NE555 Fairchild Semiconductor, NE555 Datasheet
NE555
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NE555 Summary of contents
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... Fairchild Semiconductor Corporation Description Description Description Description The LM555/NE555/SA555 is a highly stable controller capable of producing monostable operation, the time delay is controlled by one external resistor and one capacitor. With an astable operation, the frequency and duty cycle are accurately controlled by two external resistors and one capacitor. ...
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... LM555/NE555/SA555 Absolute Maximum Ratings (T Absolute Maximum Ratings (T Absolute Maximum Ratings (T Absolute Maximum Ratings (T Parameter Parameter Parameter Parameter Supply Voltage Lead Temperature (Soldering 10sec) Power Dissipation Operating Temperature Range LM555/NE555 SA555 Storage Temperature Range Symbol Symbol Symbol Symbol LEAD OPR T STG Value ...
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... SINK V = 15V 200mA SOURCE I = 100mA SOURCE 100mA SOURCE LKG = 5V for 15V operation, the max. total R = 20M , and for 5V operation, the max LM555/NE555/SA555 Min. Min. Min. Min. Typ. Typ. Typ. Typ. Max. Max. Max. Max. Unit Unit Unit Unit 4 7 1.0 3.0 % ...
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... LM555/NE555/SA555 Application Information Application Information Application Information Application Information Table 1 below is the basic operating table of 555 timer: Threshold Voltage Threshold Voltage Threshold Voltage Threshold Voltage Trigger Voltage Trigger Voltage Trigger Voltage Trigger Voltage ( )(PIN 6) )(PIN 6) )(PIN 6) )(PIN Don't care V > 2Vcc / 3 th Vcc / 3 < ...
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... C2 1E-3 1E-3 1E-3 1E-3 100m 100m 100m 100m Figure 6. Capacitance and Resistance vs. Frequency Figure 6. Capacitance and Resistance vs. Frequency Figure 6. Capacitance and Resistance vs. Frequency Figure 6. Capacitance and Resistance vs. Frequency LM555/NE555/SA555 *C and reaches 2Vcc the longer it takes +2R +2R +2R + 100 100 ...
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... LM555/NE555/SA555 Figure 7. Waveforms of Astable Operation Figure 7. Waveforms of Astable Operation Figure 7. Waveforms of Astable Operation Figure 7. Waveforms of Astable Operation An astable timer operation is achieved by adding resistor R operation, the trigger terminal and the threshold terminal are connected so that a self-trigger is formed, operating as a multi vibrator. When the timer output is high, its internal discharging Tr. turns off and the V ...
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... By adjusting the length of the timing cycle, the basic circuit of Figure 1 can be made to operate as a frequency divider. Figure 8. illustrates a divide-by-three circuit that makes use of the fact that retriggering cannot occur during the timing cycle – ------------------------------------ the amount of time it takes for the (10) C =0.693(R + because the period is the sum of the charge time and discharge LM555/NE555/SA555 (t) to reach Vcc/ ...
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... LM555/NE555/SA555 Figure 8. Waveforms of Frequency Divider Operation Figure 8. Waveforms of Frequency Divider Operation Figure 8. Waveforms of Frequency Divider Operation Figure 8. Waveforms of Frequency Divider Operation 4. Pulse Width Modulation 4. Pulse Width Modulation 4. Pulse Width Modulation 4. Pulse Width Modulation The timer output waveform may be changed by modulating the control voltage applied to the timer's pin 5 and changing the reference of the timer's internal comparators ...
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... Figure 12. Waveforms of pulse position modulation Figure 12. Waveforms of pulse position modulation Figure 12. Waveforms of pulse position modulation Figure 12. Waveforms of pulse position modulation +Vcc Figure 14. Waveforms of Linear Ramp Figure 14. Waveforms of Linear Ramp Figure 14. Waveforms of Linear Ramp Figure 14. Waveforms of Linear Ramp 13 =0.7V, BE LM555/NE555/SA555 ...
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... LM555/NE555/SA555 When the trigger starts in a timer configured as shown in Figure 13, the current flowing through capacitor C1 becomes a constant current generated by PNP transistor and resistors. Hence, the linear ramp function as shown in Figure 14. The gradient S of the linear ramp function is defined as C follows – ...
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... Mechanical Dimensions Mechanical Dimensions Package Package Package Package 6.40 0.20 0.252 0.008 # 7.62 0.300 Dimensions in millimeters Dimensions in millimeters Dimensions in millimeters Dimensions in millimeters 8-DIP 8-DIP 8-DIP 8-DIP 5.08 MAX 0.200 3.40 0.33 0.20 0.013 0.134 0.008 LM555/NE555/SA555 3.30 0.30 0.130 0.012 MIN ...
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... LM555/NE555/SA555 Mechanical Dimensions Mechanical Dimensions Mechanical Dimensions Mechanical Dimensions Package Package Package Package #1 #4 6.00 0.236 3.95 0.156 5.72 0.225 0.50 0.20 0.020 0.008 (Continued) 8-SOP 8-SOP 8-SOP 8-SOP 1.55 0.20 0.061 0.008 #8 #5 0.30 1.80 MAX 0.012 0.071 0.20 0.008 ...
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... Operating Temperature Operating Temperature Operating Temperature Operating Temperature 8-DIP 0 ~ +70 C 8-SOP Package Package Package Package Operating Temperature Operating Temperature Operating Temperature Operating Temperature 8-DIP 0 ~ +70 C 8-SOP Package Package Package Package Operating Temperature Operating Temperature Operating Temperature Operating Temperature 8-DIP -40 ~ +85 C 8-SOP LM555/NE555/SA555 ...
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... LM555/NE555/SA555 LM555/NE555/SA555 LM555/NE555/SA555 LM555/NE555/SA555 DISCLAIMER DISCLAIMER DISCLAIMER DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS ...