NE555_07 Datasheet, PDF (1/20 Pages) STMicroelectronics – General purpose single bipolar timers

NE555
SA555 - SE555
General purpose single bipolar timers
Features
■ Low turn off time
■ Maximum operating frequency greater than
500kHz
■ Timing from microseconds to hours
■ Operates in both astable and monostable
modes
■ High output current can source or sink 200mA
■ Adjustable duty cycle
■ TTL compatible
■ Temperature stability of 0.005% per °C
Description
The NE555 monolithic timing circuit is a highly
stable controller capable of producing accurate
time delays or oscillation. 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 the duty cycle are both accurately
controlled with two external resistors and one
capacitor.
The circuit may be triggered and reset on falling
waveforms, and the output structure can source
or sink up to 200mA.
N
DIP8
(Plastic package)
D
SO8
(Plastic micropackage)
Pin connections
(top view)
1
8
2
7
3
6
4
5
1 - GND
2 - Trigger
3 - Output
4 - Reset
5 - Control voltage
6 - Threshold
7 - Discharge
8 - V_CC
March 2007
Rev 4
1/20
www.st.com
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