TTL and Schottky TTL elements with an open-collector and three states

Published 28.12.2011 Presenter Valerij Kharybin

TTL and Schottky TTL elements with an open-collector and three states
TTL and Schottky TTL components with an open-collector are produced to work on load contingencies such as incandescent lamp or relay winding, for example.
If input high levels match VT3 transistor opens and incandescent lamp is radiant ...