Analog to digital converter (CB20538E)

This TTL circuit for PC was found in an English documentation from 1992. The integrated circuit used ZN426E is not in common today.

Voice Scrambler (CB4756E)
This voice scrambler circuit was obtained from an American 1990s documentation. Used operational...
ESMP Surface Mounting Schottky diodes (COM061E)
August 2016 - The new Schottky diodes from Vishay's ESMP series for surface mounting can now be...
PCM186x and PCM186x Q1 Universal Front End Audio ADCs - Texas Instruments
September 2017 - Texas Instruments PCM186x and PCM186x-Q1 Audio ADCs can be found at Mouser...