SDFS006A - MARCH 1987 - REVISED OCTOBER 1993
These devices contain two independent 4-input AND gates. They
perform the Boolean functions Y = A • B • C • D or
in positive logic.
The SN54F21 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74F21 is characterized for operation from 0°C to 70°C.