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LM3909 - LM3909 LED Flasher/Oscillator

Datasheet Summary

Description

The LM3909 is a monolithic oscillator specifically designed to flash Light Emitting Diodes By using the timing capacitor for voltage boost it delivers pulses of 2 or more volts to the LED while operating on a supply of 1 5V or less The circuit is inherently self-starting and requires addition of onl

Features

  • Y Y Y Y Y Y Y Y Operation over one year from one C size flashlight cell Bright high current LED pulse Minimum external parts Low cost Low voltage operation from just over 1V to 5V Low current drain averages under 0 5 mA during battery life Powerful as an oscillator directly drives an 8X speaker Wide temperature range.

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Datasheet Details

Part number LM3909
Manufacturer National Semiconductor
File Size 149.25 KB
Description LM3909 LED Flasher/Oscillator
Datasheet download datasheet LM3909 Datasheet
Additional preview pages of the LM3909 datasheet.

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Full PDF Text Transcription

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LM3909 LED Flasher Oscillator February 1995 LM3909 LED Flasher Oscillator General Description The LM3909 is a monolithic oscillator specifically designed to flash Light Emitting Diodes By using the timing capacitor for voltage boost it delivers pulses of 2 or more volts to the LED while operating on a supply of 1 5V or less The circuit is inherently self-starting and requires addition of only a battery and capacitor to function as an LED flasher Packaged in an 8-lead plastic mini-DIP the LM3909 will operate over the extended consumer temperature range of b 25 C to a 70 C It has been optimized for low power drain and operation from weak batteries so that continuous operation life exceeds that expected from battery rating Application is made simple by inclusion of internal timing resistors
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