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SN74ALS869: Error in internal logic diagram of SN74ALS867A and SN74ALS869?

Part Number: SN74ALS869

According to the drawing of the internal logic diagram for 74ALS869, S0 must be 0 in order to activate the 3-inputs NAND, together with ENT# and ENP# for counting up/down mode.

But input S0 is required to be 1 for counting UP/DOWN, as shows the Function Table:

Datasheet is marked as SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995, and it is available at:

https://www.ti.com/lit/gpn/sn74als869

Any comment about?

  • Hi Octavi,

    Thanks for letting us know. I have added this issue to our internal tracking system to be reviewed during the next update of this datasheet. This won't affect how the device functions so I recommend following the function table for correct operation of the device. 

    Regards,

    Sebastian