The STC12C5A16AD is an integrated circuit (IC) microcontroller manufactured by STC. It belongs to the STC12C5A series of microcontrollers. The STC12C5A16AD IC is packaged in a 44-pin leadless quad flat pack (LQFP) with 10 mm x 10 mm x 0.8 mm body size. It is certified for RoHS compliance and meets environmental and health standards. The IC offers a wide range of features, including an 8-bit central processing unit (CPU), 256 Kbytes of expanded on-chip flash memory, 6 Kbytes of RAM, one-time programmable (OTP) memory, analog-to-digital converter (ADC), timer/counter, UART, LCD, and on-chip debugging. It also incorporates power saving features, including low power sleep mode and multiple power domains. The IC operates with a clock frequency of up to 16 MHz, with an operating voltage range of 2.4 V to 5.5 V.