LM555

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SNAS548C – FEBRUARY 2000 – REVISED MARCH 2013

LM555 Timer

Check for Samples: LM555

1

FEATURES

DESCRIPTION

The LM555 is a highly stable device for generating

2

•

Direct Replacement for SE555/NE555

accurate

time

delays

or

oscillation.

Additional

•

Timing from Microseconds through Hours

terminals are provided for triggering or resetting if

•

Operates in Both Astable and Monostable

desired. In the time delay mode of operation, the time

Modes

is precisely controlled by one external resistor and

capacitor. For astable operation as an oscillator, the

•

Adjustable Duty Cycle

free running frequency and duty cycle are accurately

•

Output Can Source or Sink 200 mA

controlled

with

two

external

resistors

and

one

•

Output and Supply TTL Compatible

capacitor. The circuit may be triggered and reset on

falling waveforms, and the output circuit can source

•

Temperature Stability Better than 0.005% per

or sink up to 200mA or drive TTL circuits.

°C

•

Normally On and Normally Off Output

•

Available in 8-pin VSSOP Package

APPLICATIONS

•

Precision Timing

•

Pulse Generation

•

Sequential Timing

•

Time Delay Generation

•

Pulse Width Modulation

•

Pulse Position Modulation

•

Linear Ramp Generator

Schematic Diagram

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2

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PRODUCTION DATA information is current as of publication date.

Copyright © 2000–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.