LM3909N National Semiconductor, LM3909N Datasheet - Page 5

• Manufacturer Part Number: LM3909N
• Description: IC LED FLASHER/OSCILLATOR 8-DIP
• Manufacturer: National Semiconductor

Specifications of LM3909N

• Frequency: *
• Voltage - Supply: *
• Operating Temperature: *
• Package / Case: *
• Count: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM3909N; LM3909

Typical Applications
Note Nominal flash rate 1 3 Hz Average I
Note LM3909 capacitor and LED are installed in a white translucent cap on the flashlight’s back end Only one
contact strip (in addition to the case connection) is needed for flasher power Drawing current through the bulb
simplifies wiring and causes negligible loss since bulb resistance cold is typically less than 2
4 Parallel LEDs
DRAIN
(Continued) (See applications notes above)
e
2 mA
TL H 7969– 12
Flashlight Finder
5
Note Nominal flash rate 1 5 Hz Average I
High Efficiency Parallel Circuit
DRAIN
e
1 5 mA
TL H 7969 – 10
TL H 7969 – 13