NE555 datasheet pdf

Description DescriptionDescription Description The LM555/NE555/SA555 is a highly stable controller capable of producing accurate timing pulses. With a 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. 8-DIP 8-DIP8-DIP 8-DIP 8-SOP 8-SOP8-SOP 8-SOP 1 1 Internal Block Diagram Internal Block DiagramInternal Block Diagram Internal Block Diagram F/F F/FF/F F/F OutPut OutPutOutPut OutPut Stage StageStage Stage 1 11 1 7 77 7 5 55 5 2 22 2 3 33 3 4 44 4 6 66 6 8 88 8 R RR RR RR RR RR R Comp. Comp.Comp. Comp. Comp. Comp.Comp. Comp. Discharging Tr. Discharging Tr.Discharging Tr. Discharging Tr. Vref VrefVref Vref Vcc VccVcc Vcc Discharge DischargeDischarge Discharge Threshold ThresholdThreshold Threshold Control ControlControl Control Voltage VoltageVoltage Voltage GND GNDGND GND Trigger TriggerTrigger Trigger Output OutputOutput Output Reset ResetReset Reset LM555/NE555/SA555 Single Timer

Features

• • High Current Drive Capability (200mA)
• • Adjustable Duty Cycle
• • Temperature Stability of 0.005%/°C
• • Timing From μSec to Hours
• • Turn off Time Less Than 2μSec
• • Precision Timing
• • Pulse Generation
• • Time Delay Generation
• • Sequential Timing