KA556
Dual Timer
www.fairchildsemi.com
Features
• Replaces Two KA555 Timers
• Operates in Both Astable And Monostable Modes
• High Output Current
• TTL Compatible
• Timing From Microsecond To Hours
• Adjustable Duty Cycle
• Temperature Stability Of 0.005% Per °C
Applications
• Precision Timing
• Pulse Shaping
• Pulse Width Modulation
• Frequency Division
• Traffic Light Control
• Sequential Timing
• Pulse Generator
• Time Delay Generator
• Touch Tone Encoder
• Tone Burst Generator
Internal Block Diagram
Description
The KA556 series dual monolithic timing circuits are a
highly stable controller capable of producing accurate time
delays or oscillation. The KA556 is a dual KA555. Timing is
provided 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.
14-DIP
14-SOP
1
1
©2001 Fairchild Semiconductor Corporation
Rev. 1.0.0
