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Three microcontroller pins is all this IC needs to control eight outputs: data shifts in serially on one pin, clocked by a second, and latches out to all eight parallel output pins on a third - a simple, well-documented pattern that turns a handful of GPIO pins into as many outputs as a project chains together shift registers.
A serial output pin lets multiple 74HC595 ICs cascade end to end, so driving 16, 24 or more outputs costs no extra microcontroller pins, only more shift register ICs in the chain. The 3-state outputs and separate shift/storage register clocks are what make the classic multiplexed LED matrix and 7-segment display driving patterns possible in the first place - this IC, or a module built around it, is the standard building block behind nearly every DIY LED matrix or multi-digit display project.
Standard component for driving LED arrays, multi-digit 7-segment displays, and any project needing more digital outputs than the microcontroller has pins to spare.
| Brand | Generic |
|---|---|
| Selling unit | PCS |
