<https://cn.element14.com/c/semiconductors-ics/clock-timing-frequency-management/timers-oscillators-pulse-generators>
<http://schema.org/name>
"定时器, 振荡器与脉冲发生器"
<https://cn.element14.com/maxim-integrated-products/icm7555isa/-cmos-smd-7555-soic8/dp/2519395>