Simple Output Port Expender Circuit

We can use SIPO IC for increase output port of microcontroller
They can expender output port from three port to eight port

CD74HC4094 are 8-stage serial shift registers having a storage
latch associated with each stage for strobing data from the serial
input to parallel buffered three-state outputs.

Data is shifted on positive clock transitions. The data in each
shift register stage is transferred to the storage register when
the Strobe input is high. Data in the storage register appears
at the outputs whenever the Output-Enable signal is high.