DM74ALS540A Octal Inverting Buffer and Line Driver.
Fairchild Semiconductor
DM74ALS540A - Octal Inverting Buffer and Line Driver with 3-STATE Outputs
DM74ALS540A Octal Inverting Buffer and Line Driver with 3-STATE Outputs October 1986 Revised February 2000 DM74ALS540A Octal Inverting Buffer and Li.