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SM74101: Datasheet Error

Dan Cristy
Intellectual 2615 points
Part Number: SM74101
Other Parts Discussed in Thread: LM5112, LM5110

Hi Team -

Posting on customer behalf.

SM74101 DATA SHEET PAGE 4 UNDER ABSOL RATING IS SHOWING A TYPO AND NEEDS TO VERIFY.

On the SM74101 data sheet, Section 6.3 shows recommended operating conditions. The VCC operating range is specified at 3.5V to 14V.

Later sections indicate that the gate driver can be operated from a single power supply or a split supply. All of this leads me to believe that a split power supply of +7V and -7V could be used to power the device, since 7 + 7 = 14.

But if I set the ground reference, labeled IN_REF, in the middle at zero volts, I’ve already exceeded the absolute maximum value of IN_REF (to VEE) specified as 5V in Section 6.1. How can this be? Since I’ve already successfully run a SM74101 in excess of these conditions, I’m thinking that the IN_REF maximum listed in Section 6.1 is a typo and should be 15V (like all the other inputs) and not 5V.

Thank you. 

  • 0
    TI__Genius 12990 points
    Hi DGC,

    Thanks for reaching out to us about this!

    I see what you mean, the value IN_REF - VEE=5V is only mentioned in abs max table and is not mentioned in the section where it goes over the split supply. Something interesting I noticed was figure 14 in the datasheet shows LM5110 with VEE=-3V and when I check the IN_REF-VEE rating of LM5110 I see that it only goes up to 4V. I also noticed that the LM5112 tiny 7A driver (similar to SM74101) has the same 5V max rating. This leads me to believe that this is no mistake and since its across multiple datasheets and circuit diagrams I believe that the datasheet is correct. Its likely that you exceeding the limit by 2V didnt do any damage although outside the datasheet abs max its possible that since there is no operating max this 5V abs max rating is strict.

    Thanks,