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Infineon Technologies CY8C4125LQI-S423T — Microcontrollers & Processors (MCU / MPU / DSP)

Infineon CY8C4125LQI-S423T PSoC 4 MCU, 24MHz ARM Cortex-M0+

MPNCY8C4125LQI-S423T
End of Life

Infineon PSoC® 4 CY8C4100S series CY8C4125LQI-S423T, 32-bit ARM Cortex-M0+ MCU, 24MHz, 32KB Flash, 4K x 8 RAM, 34 I/O, 40-QFN (6x6), -40 to 85°C.

$3.05Ref. price · indicative, final on quote
Infineon Technologies CY8C4125LQI-S423T datasheet (PDF)
Packaging40-UFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesPSOC® 4 CY8C4100S
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

CY8C4125LQI-S423T specifications
ParameterValue
SeriesPSOC® 4 CY8C4100S
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.71V ~ 5.5V
Operating temperature-40°C ~ 85°C (TA)
Speed24MHz
PackageTape & Reel (TR); Cut Tape (CT)
RAM size4K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, CapSense, LCD, LVD, POR, PWM, WDT
ConnectivityI2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
Number of i (O)34
Core processorARM® Cortex®-M0+
Case40-UFQFN Exposed Pad
Data convertersA/D 16x10b Slope, 16x12b SAR; D/A 2xIDAC
Program memory size32KB (32K x 8)

Product details

What this PSoC 4 brings to a BOM line

The Infineon CY8C4125LQI-S423T is a 32-bit ARM Cortex-M0+ MCU from the PSoC 4 series, clocked at 24 MHz with 32 KB of Flash and 4K x 8 of RAM.

CapSense and LCD drive — what they save on the BOM

The integrated CapSense block eliminates a dedicated touch-controller IC for capacitive touch buttons, sliders, or proximity sensors. The LCD drive peripheral can directly segment-drive a small character or segment LCD display without an external driver chip. For a control panel with four touch buttons and a 16-segment display, this MCU replaces three separate ICs — the touch controller, the LCD driver, and the main MCU — consolidating the BOM and reducing board area.

Frequently asked questions

Is CY8C4125LQI-S423T RoHS compliant?

Yes, it is ROHS3 compliant.

What are alternatives to CY8C4125LQI-S423T?

For applications needing Bluetooth, the CY8C4247LQI-BL473 adds BLE at 48 MHz with 36 I/O.