®
NE555
SA555 - SE555
GENERAL PURPOSE SINGLE BIPOLAR TIMERS
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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
o
C
N
DIP8
(Plastic Package)
D
SO8
(Plastic Micropackage)
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.
PIN CONNECTIONS
(top view)
ORDER CODES
Part
Number
NE555
SA555
SE555
Temperature
Range
0 C, 70 C
–40 C, 105 C
–55 C, 125 C
o
o
o
o
o
o
Package
N
•
•
•
D
•
•
•
1
2
3
4
8
7
6
5
1
2
3
4
5
6
7
8
- GND
- Trigger
- Output
- Reset
- Control voltage
- Threshold
- Discharge
- V
CC
July 1998
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