PSoC 4 MCU with integrated CapSense — 48 MHz Cortex-M0+ in a 48-QFN
The Infineon CY8C4145LQI-PS433 is a 32-bit ARM Cortex-M0+ microcontroller clocked at 48 MHz. It packs 32 KB of Flash program memory and 4K x 8 of SRAM, with 38 general-purpose I/O lines.
CapSense and mixed-signal converters — what the analog chain handles
The 16-channel 10-bit slope ADC is adequate for slow sensor reads (thermistors, potentiometers) where noise averaging is acceptable. The 8-channel 12-bit SAR ADC gives better resolution for faster signals — current sensing or battery voltage monitoring. Two IDAC outputs drive external sensor excitation or generate analog reference currents. The CapSense block supports up to 38 capacitive touch channels using the internal CSD algorithm, with no external charge-conversion IC needed.
Lifecycle and sourcing
The CY8C4145LQI-PS433 carries an Active lifecycle status — no end-of-life notice, no last-time-buy window. It is RoHS3 compliant. If you need a pin-compatible second source for dual-sourcing, the PSoC 4 family includes several 48-QFN variants with the same footprint — qualify the specific Flash/RAM and peripheral set against your firmware image.