74HC374 is a 20 Pin 3-State output Octal D-Type Flip-Flop IC having 2V to 6V Operating Voltage range with 7.8mA output current and high noise immunity.

74HC4020 is a 16 Pin 14-Stage Binary Ripple Counter?IC?having 2V to 6V Operating Voltage range with 1uA low input current. It has??a clock input (CP), an?overriding asynchronous master reset input (MR) and 12 buffered parallel outputs (Q0,?and Q3 to Q13).

74HC4040 is a 16 Pin 12-Stage Binary Ripple Counter IC?having 2V to 6V Operating Voltage range with 1uA low input current. It has a clock input (CP),?an overriding asynchronous master reset input (MR) and twelve parallel outputs (Q0 to?Q11). The counter advances on the HIGH-to-LOW transition of CP.

74HC540 is a 20 Pin Octal 3-state Inverting Buffer IC?having 2V to 6V Operating Voltage range with 6mA output current. The 3-STATE ?buffers ?utilize ?advanced ?silicon-gate ?CMOS ?technology.

The 74HC541 is an octal non-inverting buffer/line driver with 3-state outputs. The device features two output enables (OE1 and OE2). A HIGH on OEn causes the outputs to assume a high-impedance OFF-state.