Circuit for sleep mode (CB8430E)

This circuit was found in a 90s Electronic Design. It uses integrated circuits that are not common today.

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Stereo Volume Control LM13600 (CB19818E)
This circuit was found in the component's own manual, which is not very common nowadays. Note that...
DC DC Converter 18 V x 5 A (CB1232E)
The circuit shown is a Step-Down converter that can provide a 5 A output with 4 to 18 V inputs. The...
Programmed Shower (CB4448E)
This circuit, from a 1988 documentation, makes successive actuation of the shower to control the...