Connected NC pin of 5V regulator to GND

F

Flyback

Well-Known Member
Hi,
We wish to have a common footprint for LM78L05 and TL751L. (SOIC8) .Both are 5v regs.
This means we need to have the "NC" pin (pin 5) of LM78L05 connected to GND. Do you think this will be OK?
The datasheet doesnt say.

TL751

LM78L05
 
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chatgpt answered this way, but could not provide a source for its answer L:



I guess next best thing is ohmmeter the pin with respect to ground, also to its Vdd.
 
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The two 3-pin packages for the LM78L05 have only got three connections, so there are only going to be two bond wires with the back of the IC die on the central pin. On the SOIC and the SOT-89 package, there are multiple ground pins, and I guess that the pins are all formed from one bit of metal.

Pins 4 and 5 of the SOIC are NC, which is different from the four middle pins that are ground. Pins 4 and 5 won't be connected to anything.

You can test it easily.
 
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