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ULN2003A: ULN2003A driver ability

Darren Yang
Expert 2000 points
Part Number: ULN2003A
Other Parts Discussed in Thread: TPL7407LA

now we use ULN2003A have above questions，could you help to check it，tks！

First: Does the ULN2003a have requirements for the IO input level? ? 1.8V or 3.3V
Second: What is the input current of ULN2003a? If you use Hasics chip 1.8V IO port driver, is there any problem? ? ? ?

  • 0
    TI__Genius 15780 points

    Hi Darren,

    The two specs you want to take a look at are on-state input voltage (V_I(ON)) and input current (I_I). Looking at these specs, you would need a 3.3V IO input and a current driving capability of about 1.35mA. Based on your requirements, you may want to take a look at the TPL7407LA. This device is P2P and has lower IO input voltage and current requirements.

    Thanks,

    Alek Kaknevicius