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Question about SN74LV21A

Satoshi
Guru 19685 points

Other Parts Discussed in Thread: SN74LV21A

Please let me check about SN74LV21A below.

Is SN74LV21A CMOS logic?

I think that SN74LV series is CMOS, but TI web spec written in TTL on Input type and output type.

※I want to check that Output pullup is necessary or not.

Best regards,

Satoshi

  • 0
    Guru 326180 points

    The LV-A family indeed is CMOS. "TTL" would just mean that the signal levels would be compatible with TTL devices.

    However, according to the datasheet, the signal levels are not TTL compatible. Apparently, lots of LV-A devices are marked wrong in TI's database.

  • 0 in reply to Clemens Ladisch
    TI__Guru 64120 points
    Thank you Clemens for your response .
    I agree . Some of the product folder contents need updated to indicate the correct behavior of the devices . I will put in a request to get this updated . If there are other typos in the product folder please point them out . We are striving to keep up the content valid and relevant .