Mixed-signal PSoC 1 in a compact 8-SOIC
The Infineon CY8C24123A-24SXIT is an 8-bit PSoC 1 microcontroller built around the proprietary M8C core clocked at 24 MHz. It packs 4 KB of Flash program memory and 256 x 8 bytes of RAM into an 8-SOIC package, with 6 general-purpose I/O lines accessible through the surface-mount footprint. The distinguishing feature of this part is its integrated mixed-signal block: a 4-channel 14-bit ADC and a 2-channel 9-bit DAC, letting a single chip handle analog front-end conditioning and digital control without an external converter. Typical applications include sensor interface modules, handheld instruments, and low-power control nodes where board space is tight and the design needs one-chip analog-to-digital conversion.
24 MHz M8C core — throughput for serial-bus applications
The 24 MHz clock rate on the M8C core handles I²C, SPI, and UART/USART traffic while servicing on-chip ADC conversions. The internal oscillator eliminates an external crystal.
4 KB Flash, no field updates possible
The program memory is 4 KB of Flash, factory-programmable and field-reprogrammable through the chip's serial interface. That is a small code space — enough for a bootloader plus a few sensor-compensation routines, but not enough for a full protocol stack with a GUI menu. The 256 x 8 RAM is similarly tight; data logging beyond a few dozen samples will need external serial EEPROM or a larger PSoC 1 variant.
Industrial temperature grade, 2.4 V to 5.25 V supply
Rated for -40°C to 85°C ambient. Supply range from 2.4 V to 5.25 V.
Active lifecycle — no LTB clock
The CY8C24123A-24SXIT carries an Active product status. Infineon has not issued an end-of-life notice or a last-time-buy window for this order code. That means a BOM line using this part is not under a forced redesign timeline. For new-design qualification, the same mixed-signal capability is also available in the CY8C29466-24PVXI (24 I/O, 12x14b ADC, 4x9b DAC in a different package) if the 8-SOIC I/O count is too tight.
Sourcing this part to your BOM
This order code is sourced through independent distribution channels — confirmed available on request. Pricing and current stock levels are verified at quote time against the multi-source supply base. Submit an RFQ with your target quantity and required delivery window; the quote will reflect the best available channel position for this active PSoC 1 MCU.