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Is it possible to control the base of the transistor using the level shift chip (3.3V / 5V)? I want to use the SN74AHCT125 level shift chip.

Transistor BC337-16

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    \$\begingroup\$ It is possible to get bad results too unless you are more specific on your configuration and output spec limits., \$\endgroup\$ – Sunnyskyguy EE75 Dec 26 '18 at 15:04
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    \$\begingroup\$ Please edit your question to include a schematic of what you're really trying to do. As pointed out in the answer, a level-shifter is almost certainly unnecessary. \$\endgroup\$ – TimWescott Dec 26 '18 at 18:14
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There generally is no need to use a level shifter to control a BJT transistor, as long as the high output level is higher than the required \$V_{\rm BE}\$ (1.2V for your BC337-16 transistor, with \$I_{\rm C} = 300 \rm mA\$ and \$V_{\rm CE} = 1 \rm V\$). WHat are you trying/willing to do?

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