Product details

Function General-purpose timer Iq (typ) (mA) 3 Rating Catalog Operating temperature range (°C) 0 to 70 Supply voltage (max) (V) 16 Supply voltage (min) (V) 4.5
Function General-purpose timer Iq (typ) (mA) 3 Rating Catalog Operating temperature range (°C) 0 to 70 Supply voltage (max) (V) 16 Supply voltage (min) (V) 4.5
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Direct Replacement for SE555/NE555
  • Timing from Microseconds through Hours
  • Operates in Both Astable and Monostable Modes
  • Adjustable Duty Cycle
  • Output Can Source or Sink 200 mA
  • Output and Supply TTL Compatible
  • Temperature Stability Better than 0.005% per °C
  • Normally On and Normally Off Output
  • Available in 8-pin VSSOP Package
  • Direct Replacement for SE555/NE555
  • Timing from Microseconds through Hours
  • Operates in Both Astable and Monostable Modes
  • Adjustable Duty Cycle
  • Output Can Source or Sink 200 mA
  • Output and Supply TTL Compatible
  • Temperature Stability Better than 0.005% per °C
  • Normally On and Normally Off Output
  • Available in 8-pin VSSOP Package

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. For a stable operation as an oscillator, the free running frequency and duty cycle are accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output circuit can source or sink up to 200 mA or drive TTL circuits.

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. For a stable operation as an oscillator, the free running frequency and duty cycle are accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output circuit can source or sink up to 200 mA or drive TTL circuits.

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Technical documentation

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Type Title Date
* Data sheet LM555 Timer datasheet (Rev. D) PDF | HTML 21 Oct 2014
Application note Considering TI Smart DACs As an Alternative to 555 Timers PDF | HTML 02 Sep 2021
Application note HS Load/Line Transient Jigs and App Rpt for Testing POL Regulators 30 Apr 2013
Application note AN-694 A DMOS 3A, 55V, H-Bridge: The LMD18200 (Rev. C) 26 Apr 2013

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Package Pins CAD symbols, footprints & 3D models
PDIP (P) 8 Ultra Librarian
SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian

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