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Dual bipolar timer

NE556 Internal Circuitry

Explore the internal circuitry and functional stages of NE556.

Package view

Inside NE556

Two timer channels inside one package outline.

A compact NE556 cutaway shows two comparator and latch paths, each with its own output driver and discharge switch; both share VCC14 and GND7.
Functional cutaway, not a transistor-level die schematic.

Explore the circuit

Select a stage to see its role and connections

Compare the timing voltage

Two reference levels determine when each channel changes state.

Remember the state

A separate latch per channel controls its output and discharge switch.

Share the supply only

A common bypass capacitor serves VCC and GND; timing and reset remain independent.

Component view