These devices contain four independent 2-input positive-NAND
buffers with open-collector outputs. They perform the Boolean
functions or Y = A\ + B\
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 often are
used to generate higher VOH levels.
The SN54ALS38B is characterized for operation over the full
military temperature range of -55°C to 125°C. The
SN74ALS38B is characterized for operation from 0°C to 70°C.
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