8051 core with programmable analog in a 7x7 mm QFN
The CY8C3446LTI-073: It integrates a 16-channel 12-bit ADC and two 8-bit DACs, plus dedicated CapSense, DMA, POR, PWM, and WDT peripherals, so a single chip handles both sensor acquisition and system supervision in a mixed-signal design. The 48-QFN package (7x7 mm) with exposed pad pulls heat into the PCB ground plane — useful when the on-chip analog blocks and USB transceiver are active simultaneously in a compact enclosure.
The internal oscillator means the part boots without a crystal — one less component to qualify on the assembly line, though the accuracy is adequate for UART timing, not precision clocking.
Connectivity and I/O budget
The USB peripheral is a full-speed device controller — useful for direct PC connection during development or as a configuration port in a deployed instrument.