5 ms·
My brain went right to search for 2 terms I want everyone to get correct.. still no definitive source to search for the meaning of VCC and VDD. I still see peop
by adhoc_slime 5y ago
My brain went right to search for 2 terms I want everyone to get correct.. still no definitive source to search for the meaning of VCC and VDD. I still see people get this wrong _all the time_.
- myself248 5y agoCollector and Drain, I thought?
- dylan604 5y agowith a stutter? what are the repeated letters for, redundancy?
- myself248 5y agoThe repeated letters are to say "not necessarily the collector of _this_ transistor (which may be, for instance, the bottom of a push-pull pair), but the collector of the most-collector-ward transistor". Explained here: https://en.wikipedia.org/wiki/IC_power-supply_pin https://en.wikipedia.org/wiki/IC_power-supply_pin
- hulitu 5y agoThat's because they get the meaning from the environment (i.e. datasheets, schematics). And writing a good datasheet is hard and the companies who did this are mostly gone ( Hello Motorola).
- jonsen 5y agoI think this WP article is rather illuminating: https://en.m.wikipedia.org/wiki/IC_power-supply_pin https://en.m.wikipedia.org/wiki/IC_power-supply_pin
- metaphor 5y agoPrecisely how do you define definitive so that we might better understand what you assert to be wrong? My naive intuition suspects he knows, so here's a contrarian curveball pulled directly out of JEDEC JESD88 Dictionary of Terms for Solid-State Technology[1] to consider (my emphasis): > drain power voltage (VDD): The primary power voltage on MOS devices that require a potential that differs from the normal system logic voltage. The term VDD is used interchangeably with VCC on devices that use 5‑V supplies. [1] https://www.jedec.org/standards-documents/dictionary/terms/drain-power-voltage-vdd https://www.jedec.org/standards-documents/dictionary/terms/d...