器件名称: NE555_07
功能描述: General purpose single bipolar timers
文件大小: 494.36KB 共20页
简 介: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 D SO8 (Plastic micropackage) N DIP8 (Plastic package)
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.
Pin connections (top view)
1 2 3 4
8 7 6 5
1 - GND 2 - Trigger 3 - Output 4 - Reset
5 - Control voltage 6 - Threshold 7 - Discharge 8 - VCC
March 2007
Rev 4
1/20
www.st.com 20
Contents
NE555 - SA555 - SE555
Contents
1 2 3 4 Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Application information . . . . . . . . . . .……
