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LM555H - Timer

Download the LM555H datasheet PDF. This datasheet also covers the LM555QML variant, as both devices belong to the same timer family and are provided as variant models within a single manufacturer datasheet.

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

  • 1.
  • 2 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.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM555QML-etcTI.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM555 Timer National Semiconductor
LM555 Single Timer Fairchild Semiconductor
LM555 Timers Harris Corporation
LM555C Timer National Semiconductor
LM555C Timers Harris Corporation

Other Datasheets by Texas Instruments

Part Number Description
LM555 Timer
LM555-MIL Timer
LM555CM Timer
LM555CN Timer
LM555J Timer

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM555QML www.ti.com SNOSAP2C – AUGUST 2005 – REVISED APRIL 2013 LM555QML Timer Check for Samples: LM555QML FEATURES 1 •2 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 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.