[Danko]’s minimal circuit is about as small as possible for the DIP version of the venerable 555 chip. The BOM is stripped to the bone: just the chip, three resistors, a capacitor, and an LED ...

The 555 timer IC is an integrated circuit (chip) which is used in a variety of timer, delay, pulse generation, and oscillator applications. 555 Signals and Pinout ... 555 as Monostable.

In the 555 there’s two darlington pairs, so that narrows the range somewhat, but there’s still millivolts of ambiguity where the circuit can’t quite decide whether to be on or off; instead ...

The circuit in Figure 1 uses these signals as inputs to a 4538 single-chip, dual monostable multivibrator. Depending on the speed required for the application, the IC could be a metal-gate device ...

Applications of commercially available integrated timers, including the NE/SE555, are fairly limited when used in their monostable mode. This is due to their inability to function ...