CY8C4245AXI-483 - 32KB Flash PSoC 4200 MCU | Infineon
MPN: CY8C4245AXI-483 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.32 | $43.20 |
| 100 | $3.79 | $379.00 |
| 500 | $3.38 | $1,690.00 |
| 1,000 | $2.96 | $2,960.00 |
CY8C4245AXI-483 Overview
A PSoC (Programmable System-on-Chip) is a microcontroller family in which the analog and digital peripherals are defined by reconfigurable hardware blocks rather than fixed-function IP. PSoC 4 specifically pairs an ARM Cortex-M0 core with Cypress/Infineon's UDB and AB blocks, sitting in the hierarchy: microcontroller -> embedded MCU -> ARM Cortex-M MCU -> PSoC 4 family -> PSoC 4200 series. The CY8C4245AXI-483 represents one of the higher-density flash parts in the 4200 series.
Key features include 32 KB Flash, 4 KB SRAM, 36 programmable GPIO, two op-amps and two comparators in the analog subsystem, four Timer/Counter/PWM blocks, a USB Full-Speed peripheral (note the absence), I2C, SPI, UART, and a 12-bit 1 Msps SAR ADC. Drive modes, drive strengths, and slew rates are all programmable, giving PCB designers flexibility for signal integrity. Extended Industrial temperature range -40°C to +105°C is supported per the package suffix.
The technical architecture combines the ARM Cortex-M0 core (Thumb-2 instruction set, single-cycle 32x32 multiplier) with the PSoC fabric of UDBs, programmable routing, and a 12-bit DAC-capable IDAC. A capacitive sensing block (CapSense) supports touch and proximity user interfaces directly without external components, which is why PSoC 4200 parts dominate home appliance and white-goods touch-panel designs.
Typical applications include home appliance user interfaces (CapSense buttons/sliders), white goods motor control front-ends, smart sensor hubs, industrial HMI panels, low-cost BLE/Sub-GHz sensor nodes (as host MCU), and capacitive proximity/gesture interfaces. The wide -40°C to +105°C operating range also suits outdoor or garage cabinet electronics. Selection typically favors the CY8C4245 when more flash (32 KB) is required than the CY8C4244 (16 KB) or CY8C4135/4125 (lower pin-count or flash-density variants).
A key design consideration is that TQFP-44 is the largest of the five package options offered in the 4200 family; designers migrating to a smaller PCB can substitute the CY8C4245AXI-483 with the Q41-A48 40-pin QFN or 28-pin SSOP at the expense of GPIO count. The 483 suffix refers to a specific firmware feature subset and should be verified against the PSoC Creator 4.x component catalog rather than chosen arbitrarily.
This page synthesizes distributor pricing, same-package drop-in variants (CY8C4245AXI-483T, CY8C4245AXI-482), other-density 4200 family members, and practical design notes not found in the standalone manufacturer datasheet.
Drop-in alternatives for CY8C4245AXI-483 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C4245AXI-483T
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4245AXI-482
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4244AXI-483
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4135AXI-483
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4125AXI-483
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4245PVI-483
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
CY8C4245AXI-483 Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0 (32-bit) |
| Maximum CPU Clock | 48 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 4 KB |
| Programmable I/O | 36 (max for 44-TQFP) |
| ADC | 12-bit SAR, 1 Msps |
| DAC | IDAC (programmable current DAC) |
| Op-Amps | 2 (in analog subsystem) |
| Comparators | 2 |
| Timer/Counter/PWM Blocks | 4 TCPWM blocks |
| Communication Peripherals | I2C, SPI, UART |
| Capacitive Sensing | CapSense block (touch/proximity) |
| Package | 44-TQFP (10x10 mm) |
| Operating Temperature | -40°C to +105°C (industrial) |
| RoHS Status | Compliant |
CY8C4245AXI-483 Pin Configuration
| Pin 1 | P0.0 — GPIO / CapSense / analog |
| Pin 2 | P0.1 — GPIO / CapSense / analog |
| Pin 3 | P0.2 — GPIO / CapSense / analog |
| Pin 4 | P0.3 — GPIO / CapSense / analog |
| Pin 5 | P0.4 — GPIO / CapSense / analog |
| Pin 6 | P0.5 — GPIO / CapSense / analog |
| Pin 7 | P0.6 — GPIO / CapSense / analog |
| Pin 8 | P0.7 — GPIO / CapSense / analog |
| Pin 9 | VDD — Power supply |
| Pin 10 | VSS — Ground |
| Pin 11 | P1.0 — GPIO / analog |
| Pin 12 | P1.1 — GPIO / analog |
| Pin 13 | P1.2 — GPIO / analog |
| Pin 14 | P1.3 — GPIO / analog |
| Pin 15 | P1.4 — GPIO / analog |
| Pin 16 | P1.5 — GPIO / analog |
| Pin 17 | P1.6 — GPIO / analog |
| Pin 18 | P1.7 — GPIO / analog |
| Pin 19 | P2.0 — GPIO / analog |
| Pin 20 | P2.1 — GPIO / analog |
| Pin 21 | P2.2 — GPIO / analog |
| Pin 22 | P2.3 — GPIO / analog |
| Pin 23 | P2.4 — GPIO / analog |
| Pin 24 | P2.5 — GPIO / analog |
| Pin 25 | P2.6 — GPIO / analog |
| Pin 26 | P2.7 — GPIO / analog |
| Pin 27 | P3.0 — GPIO |
| Pin 28 | P3.1 — GPIO |
| Pin 29 | P3.2 — GPIO |
| Pin 30 | P3.3 — GPIO |
| Pin 31 | P3.4 — GPIO |
| Pin 32 | P3.5 — GPIO |
| Pin 33 | P3.6 — GPIO |
| Pin 34 | P3.7 — GPIO |
| Pin 35 | VSS — Ground |
| Pin 36 | VDD — Power supply |
| Pin 37 | XRES — External reset (active low) |
| Pin 38 | P4.0 — GPIO |
| Pin 39 | P4.1 — GPIO |
| Pin 40 | P4.2 — GPIO |
| Pin 41 | P4.3 — GPIO |
| Pin 42 | VREF — Voltage reference |
| Pin 43 | NC — Not connected |
| Pin 44 | NC — Not connected |
Typical Applications
CY8C4245AXI-483 is suitable for 7 applications: Home Appliance Touch User Interface, White Goods Motor Control Front-End, Smart Sensor Hub / IoT Edge Node, Industrial HMI Control Panel, Capacitive Proximity / Gesture Sensor, Automotive Body Electronics (Non-Safety), Battery-Powered Wireless Sensor Node.
Home Appliance Touch User Interface
The CY8C4245AXI-483 is a primary fit for home appliance UIs because the on-chip CapSense block implements up to 36 capacitive touch sensors, replacing mechanical buttons and reducing BOM cost and improving reliability. Its 12-bit 1 Msps SAR ADC handles liquid-level sensing on washing machines and capacitive slider position feedback on cooktops. The 32 KB Flash fits CapSense middleware plus an appliance state machine; the 4 KB SRAM is sufficient for the touch-scan ring buffer. Industrial -40°C to +105°C operation tolerates kitchen and laundry cabinet temperatures, and the 44-TQFP-10x10 footprint is standard across the family for platform design reuse.
Recommended
White Goods Motor Control Front-End
In white-goods motor-control applications the CY8C4245AXI-483 provides sensor sampling, RPM measurement, and protection logic, while a dedicated gate-driver IC handles the power stage. Its four TCPWM blocks generate the timing for triac-based universal-motor control and its 12-bit ADC samples back-EMF for sensorless rotor-position estimation. The 32 KB Flash fits state-machine plus self-test firmware; the Cortex-M0 @ 48 MHz executes control loops in microseconds. Operating temperature -40°C to +105°C covers the dryer's motor compartment. The 44-TQFP-10x10 footprint allows direct mount on a standard appliance control board.
Recommended
Smart Sensor Hub / IoT Edge Node
The CY8C4245AXI-483 operates as a sensor-hub host aggregating I2C/SPI sensors (temperature, humidity, gas, motion) and forwarding data over UART to an upstream Wi-Fi/BLE module. Its 36 GPIO multiplex sensor interrupts and its 12-bit ADC digitizes analog sensors directly. The 4 KB SRAM buffers several sensor frames before transmission. At 48 MHz, the Cortex-M0 executes typical sensor-fusion algorithms (Kalman filter, low-pass) at low power. The PSoC Creator IDE provides tested middleware for I2C/SPI sensor drivers, shortening firmware development. The 44-TQFP-10x10 footprint supports hand-solder prototype boards.
Recommended
Industrial HMI Control Panel
The CY8C4245AXI-483 drives industrial HMI panels combining a small TFT or character LCD, capacitive buttons, and isolated communication interfaces. The 32 KB Flash stores icon bitmaps, menu state, and the protocol stack (Modbus RTU over UART). The 4 TCPWM blocks backlight-dim the display via PWM. The on-chip 12-bit ADC reads front-panel analog trimmers and 4–20 mA loopbacks. Operating temperature -40°C to +105°C supports factory-floor enclosures. The 44-TQFP-10x10 footprint is compatible with hand-rework and 4-layer industrial PCB stack-ups.
Recommended
Capacitive Proximity / Gesture Sensor
Gesture-based interfaces in lighting controls and proximity-aware security panels use the CY8C4245AXI-483's CapSense block to detect approach and swipe gestures up to 30 cm. The PSoC CapSense middleware implements gesture recognition in software with the Cortex-M0 @ 48 MHz, offloading the upstream application MCU. The 32 KB Flash fits the gesture library plus custom gesture definitions. Industrial -40°C to +105°C operation suits outdoor security panels. The 44-TQFP footprint eases integration with the main application processor board.
Recommended
Automotive Body Electronics (Non-Safety)
Although the CY8C4245AXI-483 is not AEC-Q100 qualified, designers use it for non-safety body-electronics prototypes (interior lighting controllers, USB chargers, seat-control panels) where AEC-Q100 is not mandated. Its -40°C to +105°C range covers the cabin environment. The 32 KB Flash fits USB-PD controller firmware and the 12-bit ADC samples cabin temperature. The 44-TQFP-10x10 footprint matches automotive PCB design rules. For production, migrate to the AEC-Q100-qualified PSoC 4200L family (CY8C4245LQI) instead.
Recommended
Battery-Powered Wireless Sensor Node
Battery-powered wireless sensor nodes use the CY8C4245AXI-483 as the host MCU that wakes periodically, samples sensors, transmits over a companion radio (CC1310 or similar), and returns to deep-sleep. The Cortex-M0's low active current plus PSoC 4200's deep-sleep modes allow coin-cell operation. The 12-bit ADC supports battery-voltage measurement and sensor readout. The 32 KB Flash fits a small RTOS plus application code. The 44-TQFP footprint is acceptable for hand-soldered prototypes.
Recommended
Recommended Products Summary
Engineering reference data for CY8C4245AXI-483 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C4245AXI-483T | CY8C4245AXI-482 | CY8C4244AXI-483 | CY8C4135AXI-483 | CY8C4125AXI-483 |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (10x10) | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same | 44-TQFP (10x10) - same |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Flash Memory | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 16 KB (-50%) | 16 KB (-50%) |
| SRAM | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 2 KB (-50%) |
| Core | Cortex-M0 @ 48 MHz | Cortex-M0 @ 48 MHz | Cortex-M0 @ 48 MHz | Cortex-M0 @ 48 MHz | Cortex-M0 @ 48 MHz | Cortex-M0 @ 24 MHz |
| CapSense Block | Yes | Yes | Yes | Yes | Yes | Yes |
| GPIO Count | 36 | 36 | 36 | 36 | 36 | 36 |
| Operating Temperature | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C |
Key Differentiators
- On-chip CapSense block eliminates external touch controller IC (vs CY8C4244AXI-483)
- Industrial -40°C to +105°C operating range (vs STM32F030C8T6 (commercial 0°C to +85°C))
- 12-bit 1 Msps SAR ADC integrated (vs ATXMEGA32A4-AU (12-bit 2 Msps))
Design Notes
The CY8C4245AXI-483 requires a regulated VDD in the PSoC 4 specified range (typically 1.71 V to 5.5 V per the PSoC 4200 family datasheet; [DATA_NEEDED: exact VDD range]). Place a 1 µF decoupling capacitor within 2 mm of every VDD pin and a 10 µF bulk capacitor on the main VDD rail. For noise-sensitive analog (CapSense, ADC), add a ferrite bead between the digital VDD and analog AVDD pin. The XRES pin requires a 4.7 kΩ pull-up and a 100 nF cap to ground for proper reset behavior during brownouts.
Use a 4-layer PCB with a dedicated ground plane for the CY8C4245AXI-483. Route CapSense traces as short direct connections from MCU pins to touch electrodes, with a ground fill (hatched, not solid) underneath sensor traces at ~0.5 mm spacing to reduce parasitic capacitance. Keep digital traces (PWM, UART) >5 mm away from CapSense traces to avoid capacitive crosstalk. The TQFP-44 exposed thermal pad (if present on the die revision) should be soldered to a 4x4 mm ground pour for thermal relief under high GPIO toggle loads.
Do not migrate CY8C4245AXI-483 firmware to CY8C4125AXI-483 (or vice versa) without re-validating because the Flash/RAM sizes change; the PSoC Creator project must be re-targeted to the new device. Confirm the 483 suffix matches the Cypress/Infineon part-number decoder for your intended feature set (483, 482, etc., encode specific firmware feature masks). Do not assume AEC-Q100 qualification for the CY8C4245AXI-483 — it is industrial grade only; for automotive use the PSoC 4200L family (CY8C4245LQI) is required.
The CY8C4245AXI-483 GPIO drive strength, slew rate, and pull-up/pull-down are programmable per-pin via PSoC Creator. For CapSense sensor traces, configure GPIO as High-Impedance Analog with a low-leakage drive mode. For digital signals (UART, SPI), enable the moderate drive strength with a controlled slew rate to reduce EMI. The TCPWM blocks can be configured for center-aligned PWM to reduce harmonic content at the GPIO. For long PCB traces >50 mm, add a 22 Ω series damping resistor at the source pin.
Compliance Information
CY8C4245AXI-483 is industrial-grade (-40°C to +105°C) and RoHS compliant per Infineon product page. Not AEC-Q100 qualified — for automotive use choose the PSoC 4200L family (CY8C4245LQI).