The IN74ACT258 is identical in pinout to the LS/ALS258, HC/HCT258. The IN74ACT258 may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS inputs.

This device selects a (4-bit) nibble from either the A or B inputs as determined by the Select input. The nibble is presented at the outputs in inverted from when the Output Enable pin is at a low level. A high level on the Output Enable pin switches the outputs into the high-impedance state.

? TTL/NMOS Compatible Input Levels

? Outputs Directly Interface to CMOS, NMOS, and TTL

? Operating Voltage Range: 4.5 to 5.5 V

? Low Input Current: 1.0 μA; 0.1 μA @ 25°C

? Outputs Source/Sink 24 mA