[SOLVED] Why separate "Vs" and "Vss" at pin no. 8 and 16 respectively are used in L293D?

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Why separate "Vs" and "Vss" at pin no. 8 and 16 respectively are used in L293D?

I refers to the datasheet of L293D (STMicroelectronics) and it was found that separate "Vs" and "Vss" at pin no. 8 and 16 respectively are used but it was not mentioned that why we are doing so?
 

Re: Why separate "Vs" and "Vss" at pin no. 8 and 16 respectively are used in L293D?

Have a look at the TI data sheet www.ti.com/lit/ds/symlink/l293d.pdf

The SGS terminology is bad as Vss normally means 0V or GND!

Pin 16 is the logic supply, 5V for example. Pin 8 is the motor supply - see figure 3 of the TI data sheet.

Keith
 

Re: Why separate "Vs" and "Vss" at pin no. 8 and 16 respectively are used in L293D?

Thanks Keith.
I got it.
 

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