# Level shiffter (3.3V / 5V) for controlling transistors

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

• It is possible to get bad results too unless you are more specific on your configuration and output spec limits., – Sunnyskyguy EE75 Dec 26 '18 at 15:04
• 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. – TimWescott Dec 26 '18 at 18:14

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?