SA555D datasheet(1/20 Pages) STMICROELECTRONICS

部件名	SA555D

功能描述	General-purpose single bipolar timers

PDF	20 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 20 page

January 2012

Doc ID 2182 Rev 6

1/20

20

NE555

SA555 - SE555

General-purpose single bipolar timers

Features

■ Low turn-off time

■ Maximum operating frequency greater than

500 kHz

■ Timing from microseconds to hours

■ Operates in both astable and monostable

modes

■ Output can source or sink up to 200 mA

■ Adjustable duty cycle

■ TTL compatible

■ Temperature stability of 0.005% per °C

Description

The NE555, SA555, and SE555 monolithic timing

circuits are highly stable controllers 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 200 mA.

1

2

36

7

8

4

5

N

DIP8

(Plastic package)

D

SO8

(Plastic micropackage)

1 - GND

2 - Trigger

3 - Output

4 - Reset

5 - Control voltage

6 - Threshold

7 - Discharge

8 - VCC

Pin connections

(top view)

www.st.com

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