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LM555 Datasheet Timer

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM555 Timer July 2006 LM555 Timer General.

General Description

The LM555 is a highly stable device for generating accurate time delays or oscillation.

Additional terminals are provided for triggering or resetting if desired.

In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor.

Key Features

  • n Direct replacement for SE555/NE555 n Timing from microseconds through hours n Operates in both astable and monostable modes n Adjustable duty cycle n Output can source or sink 200 mA n Output and supply TTL compatible n Temperature stability better than 0.005% per ˚C n Normally on and normally off output n Available in 8-pin MSOP package.

LM555 Distributor