LM556

Contents

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 V_CC and ground. The circuits may be triggered and reset on falling waveforms. The output structures may sink or source 200mA.

• 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

• Precision timing
• Pulse generation
• Sequential timing
• Time delay generation
• Pulse width modulation
• Pulse position modulation
• Linear ramp generator