The outputs contain features that allow you to do the following:
Switch between a totem-pole and a complementary output
Include a passive pull-up or pull-down (both n -channel devices) with a typical resistance of
about 50 k W
Control the slew rate of the output.
Configure the input buffer with TTL or CMOS thresholds.
Switch in a delay to eliminate an input hold time.
Auto implements differential receive/transmit interface logic