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Current Specifications for the CD74HCT367

John Griffith
Mastermind 21501 points
Other Parts Discussed in Thread: CD74HCT367

Team,

Customer is using the CD74HCT367 and needs to know:

- What is the max Iout per buffer – 20 or 35mA?

- Will damage occur if buffer is shorted?

Also needs explanation on the DC Drain Current, per Output, Io which shows to be +/- 35mA per datasheet, and wants to know if the voltage at 20mA is TTL compatible.

Any help is appreciated,

John

  • 0
    TI__Mastermind 46480 points

    - What is the max Iout per buffer – 20 or 35mA?   The max Iout is 4ma and still meet voh and vol specs.

    - Will damage occur if buffer is shorted?   in most cases no, but damage is possible.

    Also needs explanation on the DC Drain Current, per Output, Io which shows to be +/- 35mA per datasheet, and wants to know if the voltage at 20mA is TTL compatible.

     If you are driving 20ma with this part it will not meet spec. The limits you are looking at are absolute max limits.  You need to be looking at the recomended operating conditions .

    The absolute max ratings are conditions that a part can be exposed to for a short amount of time and not be damaged. anything above that will cause damage. You should not design to these limits.   see app note. Understanding and Interpreting Standard-Logic Data Sheets (Rev. B)

     4ma is tha amount of drive these parts have where they will still meet TTL Voh and Vol limits