LM556
Dual Timer
General Description
The LM556 Dual timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. The
556 is a dual 555. Timing is provided by an external resistor
and capacitor for each timing function. The two timers operate independently of each other sharing only VCC and
ground. The circuits may be triggered and reset on falling
waveforms. The output structures may sink or source
200mA.
Features
– Direct replacement for SE556/NE556
– Timing from microseconds through hours
– Operates in both astable and monostable modes
– Replaces two 555 timers
– Adjustable duty cycle
– Output can source or sink 200mA
– Output and supply TTL compatible
– Temperature stability better than 0.005% per ?C
– Normally on and normally off output
Applications
– Precision timing
– Pulse generation
– Sequential timing
– Time delay generation
– Pulse width modulation
– Pulse position modulation
– Linear ramp generator