PSoC 4 CY8C4244AZI-443 — 48 MHz Cortex-M0 with integrated analog and CapSense
The Infineon CY8C4244AZI-443 is a PSoC® 4 CY8C42xx series 32-bit single-core MCU built around an ARM® Cortex®-M0 core clocked at 48 MHz. It carries 16 KB of on-chip Flash program memory and operates from a 1.71 V supply rail, suiting it for battery-powered and portable instrumentation where a single low-voltage rail is available. What distinguishes this part from a plain digital MCU is the integrated mixed-signal front-end: an 8-channel 12-bit SAR ADC and two current-output IDACs, plus a CapSense touch-sensing block and an LCD drive controller. These peripherals let a single chip handle capacitive touch buttons, sliders, or proximity sensing alongside basic analog measurement without external converter ICs.
The 48 MHz Cortex-M0 core places the CY8C4244AZI-443 in the low-power, cost-optimised tier of the PSoC 4 family. It is not a performance part — the sibling PSoC 6 CY8C6137BZI-F54 runs a Cortex-M4 at 150 MHz with 1 MB-class Flash — but for a touch-interface controller, a sensor hub, or a simple human-machine interface (HMI), the M0 at 48 MHz draws less current and keeps the BOM cost down.
CapSense and LCD drive — what the peripheral set buys you
The CapSense block eliminates the need for a dedicated touch controller IC in panel designs — the MCU handles capacitive touch directly, reducing component count and firmware complexity. The LCD drive peripheral can run a segment LCD without an external driver chip, useful for low-cost displays in appliance or industrial HMI panels. Both peripherals are supported by Infineon's PSoC Creator IDE, which provides graphical configuration and tuning tools.