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SN74AHCT08Q-Q1: Comparison to CD74HCT08MDRDL

Part Number: SN74AHCT08Q-Q1
Other Parts Discussed in Thread: CD74HCT08

Hello Team, 

Can you please let me know if you can use CD74HCT08MDRDL in applications where you normally use SN74AHCT08QDRQ1. 

What are the electrical characteristics that differ between the two devices. 

Regards, 

Abel

  • Hi Abel,

    For the most part yes the electrical characteristics between the two are the same. The only thing that I noticed that appears to be different is the timing characteristics, and the CD74HCT08 has an input diode likely to help with signal integrity.

    Beyond this the SN74AHCT08QDRQ1 is an automotive part so I would recommend searching for other automotive part numbers within our portfolio. For the specific voltage range and number of inputs/channels we don't appear to have anything else, but we have SN74HCS08-Q1 that is 2V to 6V 4ch, 2 input, but this isn't ttl compatible.

    Regards,

    Owen

  • Hello Owen, 

    What would be the best non-automotive cross for SN74AHCT08QDRQ1? Do we have any non-automotive devices that are TTL compatible?

    Regards, 

    Abel

  • Hello Owen, 

    What is the major difference between CD74HCT08MDRDL and CD74HCT08M96?

    I cannot find a data sheet with CD74HCT08MDRDL 

    Regards, 

    Abel

  • Hi Abel,

    I can't find anywhere on TI.com for CD74HCT08MDRDL. As for CD74HCT08M96 the 96 indicates a larger shipping quantity

    If you aren't worried about it being automotive rated. I would advise the SN74AHCT08, as that would be the most 1 to 1. The SN74AHCT08-EP  is the high reliability version however if you don't need it to be automotive I doubt you need the high reliability. 

    For any other crosses you would have to give me more information on what the product is going to be used for, and what specs you are expecting from it.

    All of the above are TTL compatible and readily available on TI.com