SE555 datasheet(1/20 Pages) STMICROELECTRONICS

No. de pieza	SE555

Descripción Electrónicos	General purpose single bipolar timers

PDF	20 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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1 / 20 page

March 2007

Rev 4

1/20

20

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)

1

2

3

45

6

7

8

1 - GND

2 - Trigger

3 - Output

4 - Reset

5 - Control voltage

6 - Threshold

7 - Discharge

8 - VCC

Pin connections

(top view)

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