April 1995

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

PIN CONNECTIONS (top view)

.

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

ORDER CODES

Part

Number

Temperature

Range

Package

ND

NE555

0

••

SA555

–40

••

SE555

–55

••

DESCRIPTION

The NE555 monolithic timing circuit is a highly stable

controller capableof producing accuratetime delays

or oscillation. In the time delay mode of operation,

the time is precisely controlled by one external re-

sistor and capacitor.For a stableoperation as an os-

cillator, the free running frequency and the duty cy-

cle are both accurately controlled with two external

resistors and one capacitor. The circuit may be trig-

gered and reset on falling waveforms, and the out-

put structure can source or sink up to 200mA. The

NE555 is available in plastic and ceramic minidip

package and in a 8-lead micropackage and in metal

can package version.

NE555

SA555 - SE555

GENERAL PURPOSE SINGLE BIPOLAR TIMERS

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