<p><span class="h-card" translate="no"><a href="https://mastodon.social/@whitequark" class="u-url mention">@<span>whitequark</span></a></span> <span class="h-card" translate="no"><a href="https://ioc.exchange/@azonenberg" class="u-url mention">@<span>azonenberg</span></a></span> I definitely would stick to multiples of 8 bits. That particular Hittite part will work fine with 8 bits. They show a schematic of the SPI interface and it's essentially a 6 bit 74HC595.</p>