SA555

更新时间： 2024-11-06 04:06:23

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		/
页数	文件大小	规格书
20页	495K
描述
General purpose single bipolar timers

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SA555 数据手册

NE555

SA555 - SE555

General purpose single bipolar timers

Features

■ Low turn off time

■ Maximum operating frequency greater than

500kHz

■ Timing from microseconds to hours

DIP8

(Plastic package)

■ Operates in both astable and monostable

modes

■ High output current can source or sink 200mA

■ Adjustable duty cycle

■ TTL compatible

SO8

■ Temperature stability of 0.005% per °C

(Plastic micropackage)

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.

Pin connections

(top view)

The circuit may be triggered and reset on falling

waveforms, and the output structure can source

or sink up to 200mA.

1 - GND

5 - Control voltage

6 - Threshold

7 - Discharge

2 - Trigger

3 - Output

4 - Reset

8 - V

March 2007

Rev 4

1/20

www.st.com

12 3 4 5 6 7...20

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