The IN74ACT161 is identical in pinout to the LS/ALS161, HC/HCT161. The IN74ACT161 may be used as a level converter for interfacing TTL or NMOS outputs to High Speed CMOS Inputs. The IN74ACT161 is programmable 4-bit synchronous modulo-16 counter that feature parallel Load, asynchronous Reset, a Carry Output for cascading and count-enable controls. The IN74ACT161 is binary counter with asynchronous 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 A @ 25 C Outputs Source/Sink 24 mA