Dual Timer
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LM556/NE556
Dual Timer
Features
• • • • • • • Replaces Two LM555/NE556 Timers Operates in Both As...
Description
www.fairchildsemi.com
LM556/NE556
Dual Timer
Features
Replaces Two LM555/NE556 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
Description
The LM556/NE556 series dual monolithic timing circuits are a highly stable controller capable of producing accurate time delays or oscillation. The LM556/NE556 is a dual LM555. 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.
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
14-DIP 14-SOP
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1
Internal Block Diagram
Rev. 1.0.0
©2001 Fairchild Semiconductor Corporation
LM556/NE556
Absolute Maximum Ratings (TA = 25°C)
Parameter Supply Voltage Lead Temperature (soldering 10sec) Power Dissipation Operating Temperature Range LM556/NE556 Storage Temperature Range Symbol VCC TLEAD PD TOPR TSTG Value 16 300 600 0 ~ + 70 - 65 ~ + 150 Unit V °C mW °C °C
2
LM556/NE556
Electrical Characteristics
(TA = 25°C, VCC = 5 ~ 15V, unless otherwise specified) Parameter Supply Voltage Supply Current *1(two timers) (low...
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