The IN74ACT163A is identical in pinout to the LS/ALS163 HC/HCT163. The IN74ACT163 may be used as a level converter for interfacing TTL or NMOS outputs to High Speed Cmos Inputs. The IN74ACT163A is programmable 4-bit synchronous counter that feature parallel Load, synchronous Reset, a Carry Output for cascading and count-enable controls. The IN74ACT163A is binary counter with synchronous Reset. 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 A ; 0.1 mA @25C Ouptuts Source/Sink 24mA