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Topic: 74LS164P shift register, in sinking configuration? (Read 6418 times) previous topic - next topic

CrossRoads

Not "shorted", but connected via transistor.

http://www.ti.com/lit/an/scea009b/scea009b.pdf

See figure 6 on page 5.

http://www.ti.com/lit/an/szza036b/szza036b.pdf

See figure 27 on page 48.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

naut

cool, thanks, the diagram makes it easy to understand:

Quote
DOC Circuit Description
Figure 6 shows a simplified output stage of a typical logic circuit. When the input is low, the n-channel transistor (Qn) turns off and the p-channel transistor (Qp) turns on and begins to conduct, and the output voltage VO is pulled high. Conversely, when the input is high, Qp turns off, Qn begins to conduct, and VO is pulled low. This action is similar to an inverter, and several of these inverting stages typically are cascaded in series to form a buffer/driver.



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