Texas Instruments SN74ALS09

these devices contain four independent 2-input positive-and gates. they perform the boolean functions y = a \x95 b or in positive logic. the open-collector outputs require pullup resistors to perform correctly. these outputs may be connected to other open-collector outputs to implement active-low wired-or or active-high wired-and functions. open-collector devices are often used to generate higher voh levels. the sn54als09 is characterized for operation over the full military temperature range of -55c to 125c. the sn74als09 is characterized for operation from 0c to 70c.