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SN74LVC2G125: Is there a better option for dual channel buffers

user5831357
Prodigy 20 points
Part Number: SN74LVC2G125
Other Parts Discussed in Thread: UCC23513, SN74LVC1G07

We now need a dual channel buffer for motor control. Conversion from 3.3V of C2000 to VCC=5V of UCC23513. For the dual channel buffer, we found SN74LVC2G125, but in datasheet,

If VCC=5.0V，3.3V<0.7x5.0. I want to ask what happens if don't meet the recommended operatig conditions.

  • 0
    Guru 243980 points

    When you go beyond the recommended operating conditions, the electrical characteristics are no longer guaranteed, and the device might not work at all. In this case, you will get large cross currents (even higher than ΔICC), and in some extreme conditions, the 3.3 V signals might not be high enough to switch the input.

    To shift the voltage level, you can use a unidirectional or direction-controlled level shifter. But 3.3 V is the high-level voltage of TTL signals, so you can also use any buffer with TTL-compatible inputs.

    Please note that for driving a single UCC23513, you need nothing more than a single SN74LVC1G07.