NE556 Datasheet, PDF (1/8 Pages) NXP Semiconductors – Dual timer

NE556
SA556 - SE556
GENERAL PURPOSE DUAL BIPOLAR TIMERS
s LOW TURN OFF TIME
s MAXIMUM OPERATING FREQUENCY
GREATER THAN 500kHz
s TIMING FROM MICROSECONDS TO
HOURS
s OPERATES IN BOTH ASTABLE AND
MONOSTABLE MODES
s HIGH OUTPUT CURRENT CAN SOURCE
OR SINK 200mA
s ADJUSTABLE DUTY CYCLE
s TTL COMPATIBLE
s TEMPERATURE STABILITY OF 0.005%
PER°C
DESCRIPTION
The NE556 dual monolithic timing circuit is a high-
ly 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 fre-
quency and the duty cycle are both accurately
controlled with two external resistors and one ca-
pacitor.
The circuit may be triggered and reset on falling
waveforms, and the output structure can source or
sink up to 200mA.
ORDER CODE
Part Number Temperature Range
NE556
SA556
SE556
0°C, 70°C
-40°C, 105°C
-55°C, 125°C
Package
ND
•
•
•
•
•
•
N = Dual in Line Package (DIP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
N
DIP14
(Plastic Package)
D
SO14
(Plastic Micropackage)
PIN CONNECTIONS (top view)
Discharge 1
Threshold ²
Control Voltage ³
Reset 4
Output ₅
Trigger 6
GND 7
14 VCC
13 ^Discharge
12 ^Threshold
11 ^{Control Voltage}
10 ^Reset
9 ^Output
8 ^Trigger
June 2003
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