Mixed-signal MCU in a 20-pin SSOP — the 8x14-bit ADC is the headline
The Infineon CY8C24223A-24PVXIT is an 8-bit M8C MCU from the PSOC®1 CY8C24xxx family, clocked at 24 MHz with 4 KB Flash and 256 bytes of RAM. What sets it apart in a 20-SSOP package is the integrated data converter array: eight 14-bit successive-approximation ADC channels and two 9-bit DAC outputs. That is an unusual amount of analog capability for a small-pin-count 8-bit part — it is designed for sensor conditioning, closed-loop control, and human-interface tasks where an external ADC would otherwise eat board area and BOM cost. The supply range spans 2.4 V to 5.25 V, so it can run directly from a single Li-ion cell or a regulated 5 V rail without a secondary LDO.
4 KB Flash, 256 bytes RAM — sizing the firmware budget
The 4 KB Flash and 256 x 8 RAM are tight by modern standards. For a simple control loop reading a few ADC channels, filtering, and driving a PWM output, the code fits comfortably. If the application needs a communication stack (I²C, SPI, UART/USART are all available), a lookup table, or any significant buffering, the RAM ceiling hits quickly. The Flash is field-reprogrammable, so firmware updates are possible, but the small size means every byte counts — expect to write lean C or drop into assembly for critical loops. The M8C core is efficient for bit-banging and register-level I/O, which helps stretch the available memory.
Industrial temperature range and active lifecycle
ROHS3 compliant, no exemption issues for global shipping.
Package and footprint — 20-SSOP, 5.3 mm body width
The 0.65 mm pitch is fine for hand-assembly but benefits from a solder-paste stencil for volume. No exposed pad — thermal management is through the leads and PCB copper. The tape-and-reel variant (TR) is the standard for pick-and-place; cut-tape (CT) is available for prototyping.
Peripherals and connectivity
On-chip peripherals include POR (Power-On Reset), PWM, and WDT — enough for standalone operation without external supervisor ICs.