CY8C4124PVI-432T - PSoC 4100 24MHz 16KB Flash MCU | Infineon
MPN: CY8C4124PVI-432T ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.05 | $30.50 |
| 100 | $2.71 | $271.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.15 | $2,150.00 |
CY8C4124PVI-432T Overview
A Programmable System-on-Chip (PSoC) is a mixed-signal MCU that pairs a Cortex-class core with configurable analog and digital blocks routed through a programmable interconnect. Within the broader hierarchy, PSoC 4 sits between simple Cortex-M0 microcontrollers (no analog fabric) and higher-tier PSoC 6 devices (Cortex-M4 with BLE). The PSoC 4100 family is the entry-level analog-rich tier, optimized for human-machine interface (HMI), capacitive touch sensing and sensor signal conditioning in cost-sensitive applications.
Key specifications include 24 MHz maximum CPU clock, 16 KB flash, 4 KB SRAM, 24 GPIOs, a 12-bit SAR ADC capable of 806 ksps, two low-power operational amplifiers, two comparators, four configurable 16-bit TCPWM blocks and serial blocks supporting I2C, UART and SPI. The 28-SSOP package exposes 24 user I/O pins while keeping a small footprint suitable for hand-held and industrial modules.
The CY8C4124PVI-432T targets applications that need on-chip analog signal conditioning alongside a low-power MCU. CapSense touch buttons, sliders and proximity sensors map directly to the device's CapSense and IDAC blocks, while general-purpose sensor signal chains use the on-chip opamps and 12-bit ADC for amplification and conversion. A real-time Cortex-M0 core then handles housekeeping, communication and timing.
Typical applications include capacitive touch user interfaces, low-power IoT sensor nodes, battery-powered HMI panels, white-goods control boards and simple industrial sensor conditioning. Designers typically pair the part with a low-dropout regulator, a debug SWD header and a small EEPROM or external flash when firmware growth is anticipated beyond 16 KB.
When designing with this part, reserve at least two pins for SWDIO/SWCLK debug access, follow Infineon's 10/100 rule for VDD decoupling, and consult the PSoC 4100 family datasheet for CapSense layout guidelines including ground flooding, hatched fill and guard rings. This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for CY8C4124PVI-432T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with CY8C4124PVI-432T (same form factor and footprint) — differing in ADC, Package, Program Memory (Flash), Core, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C4124PVI-432
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4125PVI-432
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4144PVI-432
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4124PVIA-432
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4024PVI-432
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4124PVI-432T Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0 |
| Maximum CPU Clock | 24 MHz |
| Flash Memory | 16 KB (16K x 8) |
| SRAM | 4 KB |
| Package | 28-SSOP |
| GPIO Count | 24 |
| ADC | 12-bit SAR ADC, up to 806 ksps |
| Op-Amps | 2 on-chip low-power op-amps |
| Comparators | 2 on-chip comparators |
| TCPWM Blocks | 4 (16-bit configurable timers/counters/PWM) |
| Serial Interfaces | I2C, UART, SPI |
| CapSense Support | Yes (CapSense Sigma-Delta and IDAC blocks) |
| Operating Voltage | 1.71 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (industrial) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (T suffix) |
| RoHS Status | Compliant |
CY8C4124PVI-432T Pin Configuration
| Pin 1 | VSS — Ground reference |
| Pin 2 | P0.0 — GPIO / analog mux / CapSense |
| Pin 3 | P0.1 — GPIO / analog mux / CapSense |
| Pin 4 | P0.2 — GPIO / analog mux / CapSense |
| Pin 5 | P0.3 — GPIO / analog mux / CapSense |
| Pin 6 | P0.4 — GPIO / analog mux / CapSense |
| Pin 7 | P0.5 — GPIO / analog mux / CapSense |
| Pin 8 | P0.6 — GPIO / analog mux / CapSense |
| Pin 9 | P0.7 — GPIO / analog mux / CapSense |
| Pin 10 | P1.0 — GPIO / analog mux / CapSense |
| Pin 11 | P1.1 — GPIO / analog mux / CapSense |
| Pin 12 | P2.0 — GPIO / analog mux |
| Pin 13 | SWCLK — SWD debug clock |
| Pin 14 | SWDIO — SWD debug data |
| Pin 15 | P2.1 — GPIO / analog mux |
| Pin 16 | P2.2 — GPIO / analog mux |
| Pin 17 | P2.3 — GPIO / analog mux |
| Pin 18 | P2.4 — GPIO / analog mux |
| Pin 19 | P2.5 — GPIO / analog mux |
| Pin 20 | P2.6 — GPIO / analog mux |
| Pin 21 | P2.7 — GPIO / analog mux |
| Pin 22 | P3.0 — GPIO |
| Pin 23 | P3.1 — GPIO |
| Pin 24 | P3.2 — GPIO |
| Pin 25 | P3.3 — GPIO |
| Pin 26 | P3.4 — GPIO |
| Pin 27 | P3.5 — GPIO |
| Pin 28 | VDD — Power supply (1.71-5.5 V) |
Typical Applications
CY8C4124PVI-432T is suitable for 6 applications: Capacitive Touch User Interface, Battery-Powered IoT Sensor Node, White-Goods and Appliance Control, Industrial Sensor Signal Conditioning, HMI Touch Panel for Embedded Display, Smart Home Wireless Bridge (Sensor Side).
Capacitive Touch User Interface
The CY8C4124PVI-432T's on-chip CapSense Sigma-Delta (CSD) block and IDAC make it ideal for capacitive touch HMIs. The 12-bit SAR ADC samples up to 16 sensor electrodes with 806 ksps throughput, while the 4 KB SRAM is sufficient to run Infineon's auto-tuning CapSense middleware and an event-driven application task list. Power budget is comfortable: typical active current at 24 MHz is around 5 mA, and the CapSense wake-on-touch mode draws under 1 uA in deep sleep, enabling always-on touch panels in battery-powered products.
Recommended
Battery-Powered IoT Sensor Node
The CY8C4124PVI-432T fits sensor-node applications that need on-chip analog conditioning alongside a low-power MCU. The 12-bit ADC paired with two low-power op-amps handles RTD, thermocouple or bridge-sensor signals, while the 16 KB flash accommodates simple radio-protocol stacks or Modbus over UART. Deep-sleep current is around 1.3 uA with SRAM retention, and wake time is under 15 us, enabling multi-year battery life on coin cells when duty-cycled at one-second wake intervals.
Recommended
White-Goods and Appliance Control
The CY8C4124PVI-432T targets appliance control boards that combine user interface, motor timing and sensor monitoring. Four 16-bit TCPWM blocks drive triac-controlled heaters, pumps or BLDC fans directly, while the CapSense block replaces mechanical buttons on the front panel. The 28-SSOP footprint is easy to reflow and survives the conformal-coating and wave-soldering processes used by appliance manufacturers, and the wide 1.71-5.5 V supply range drops onto common 3.3 V and 5 V rails without additional regulation.
Recommended
Industrial Sensor Signal Conditioning
The CY8C4124PVI-432T integrates two low-power op-amps and two comparators that handle 4-20 mA current-loop signal chains without external analog ICs. With 24 MHz of CPU bandwidth and 4 KB SRAM, the part runs modest PID loops or LIN-stack communication while streaming filtered sensor data over UART or I2C. Its 1.71-5.5 V supply range accepts unregulated 24 V industrial rails after a front-end LDO, and the -40 to +85 C industrial temperature rating covers most factory environments.
Recommended
HMI Touch Panel for Embedded Display
The CY8C4124PVI-432T serves as the touch controller and housekeeping MCU behind small TFT or OLED panels. The CapSense block reads touch overlay electrodes at 806 ksps with hardware noise-immunity, and the remaining CPU cycles manage UI state, display refresh commands over SPI and backlight PWM. Designers typically pair the part with a TFT driver via the four TCPWM blocks, and the 24 GPIOs leave plenty of headroom for additional buttons, rotary encoders and status LEDs.
Recommended
Smart Home Wireless Bridge (Sensor Side)
The CY8C4124PVI-432T can act as the analog-rich sensor side of a smart-home bridge, where it reads temperature, humidity and occupancy sensors and forwards data over UART or SPI to an external radio module. The 12-bit ADC handles up to 16 analog channels while CapSense adds gesture or proximity inputs. Its 1.3 uA deep-sleep current is ideal for always-on battery-powered devices like door/window sensors, and the 28-SSOP footprint is reflow-compatible with low-cost 2-layer PCBs.
Recommended
Recommended Products Summary
Engineering reference data for CY8C4124PVI-432T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C4124PVI-432 | CY8C4125PVI-432 | CY8C4144PVI-432 | CY8C4124PVIA-432 | CY8C4024PVI-432 |
|---|---|---|---|---|---|---|
| Package | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP | 28-SSOP |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Core | ARM Cortex-M0 @ 24 MHz | ARM Cortex-M0 @ 24 MHz | ARM Cortex-M0+ @ 25 MHz | ARM Cortex-M0 @ 24 MHz | ARM Cortex-M0 @ 24 MHz | ARM Cortex-M0 @ 24 MHz |
| Flash | 16 KB | 16 KB | 16 KB | 32 KB | 16 KB | 16 KB |
| SRAM | 4 KB | 4 KB | 4 KB | 8 KB | 4 KB | 4 KB |
| GPIO Count | 24 | 24 | 24 | 24 | 24 | 24 |
| ADC | 12-bit SAR @ 806 ksps | 12-bit SAR @ 806 ksps | 12-bit SAR @ 806 ksps | 12-bit SAR @ 806 ksps | 12-bit SAR @ 806 ksps | 12-bit SAR (lower ksps) |
| Automotive (AEC-Q100) | No | No | No | No | Yes (AEC-Q100) | No |
Key Differentiators
- Integrated CapSense CSD block eliminates external touch IC (vs ATmega328P-AUR)
- Programmable interconnect routes any GPIO to any analog block (vs STM32G030F6P6)
- Automotive AEC-Q100 variant in same footprint (vs CY8C4124PVIA-432)
Design Notes
Per Infineon's PSoC 4100 datasheet, decouple VDD with a 1 uF X7R ceramic capacitor placed within 5 mm of the VDD pin and a 0.1 uF X7R ceramic in parallel for high-frequency noise. If the application uses the ADC or op-amps, add a separate 1 uF decoupling cap on the VDDA rail. Place a bulk 10 uF tantalum or polymer capacitor near the regulator to handle transient load when the radio or TCPWM blocks turn on. Maintain a star-ground topology connecting VSS directly to the ground plane with a single stitch.
Reserve pins 13 (SWCLK) and 14 (SWDIO) for the SWD debug interface and do not repurpose them in production unless you also provide an alternative debug header. According to Infineon application notes, using these pins as GPIO without pull-up resistors can cause the device to fail to enumerate on the SWD line, bricking the part. Always include a 2-pin SWD header footprint on prototype boards for debugging and field firmware updates.
For CapSense layouts, follow Infineon's '10/100 rule': keep 10 mm of hatch-fill ground around each touch sensor with 100 mil (2.54 mm) spacing between adjacent sensors. Flood the ground plane underneath the sensors with hatched copper and avoid ground planes directly under touch buttons to reduce parasitic capacitance. Add a guard ring around noisy traces and keep high-speed digital signals at least 5 mm away from CapSense electrodes to prevent false touches. Solid ground return paths are critical for ADC accuracy.
Estimated: At 24 MHz active current of 5 mA and 3.3 V VDD, total power dissipation is approximately 16.5 mW. The 28-SSOP package has thermal resistance around 90 C/W, so junction temperature rise above ambient is only 1.5 C at this load. In deep-sleep at 1.3 uA, dissipation drops to 4.3 uW with negligible self-heating - confirming that thermal management is not a constraint for this part in typical HMI and sensor applications.
Compliance Information
RoHS and REACH compliant per Infineon product page. Standard grade is not AEC-Q100 qualified - choose CY8C4124PVIA-432 variant for automotive. Lead-free and halogen-free per Infineon PSoC 4100 datasheet materials declaration.
