CY8C4247AZI-L445 - 48MHz ARM Cortex-M0 PSoC 4200L MCU, 128KB Flash | Infineon
MPN: CY8C4247AZI-L445 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.92 | $8.92 |
| 10 | $7.98 | $79.80 |
| 100 | $6.85 | $685.00 |
| 500 | $6.1 | $3,050.00 |
| 1,000 | $5.42 | $5,420.00 |
CY8C4247AZI-L445 Overview
What is a PSoC (Programmable System-on-Chip)? A PSoC is a microcontroller with a CPU core surrounded by programmable analog and digital Universal Digital Blocks (UDBs) and Universal Analog Blocks, all interconnected by a flexible routing matrix. PSoCs sit within the broader hierarchy of microcontroller -> embedded controller -> programmable SoC -> semiconductor. The PSoC 4 family uses a Cortex-M0 core (a 32-bit ARMv6-M architecture) and adds CAPSENSE™ capacitive-sensing IP, making these parts especially well suited to touch interfaces, slider/proximity sensing, and industrial HMI front-ends.
Key features of the CY8C4247AZI-L445 include a 1.71–5.5 V wide VDD range, a 4-channel DMA controller, a 4-input 12-bit SAR ADC with up to 1 Msps throughput, two IDAC channels, four TCPWM blocks, and a full-speed USB 2.0 FS controller with an internal 3-pin. The integrated CAPSENSE™ Sigma-Delta (CSD) block provides hardware-accelerated capacitive touch sensing with SmartSense™ auto-tuning, eliminating manual PCB and firmware compensation.
Architecturally, the device combines the 48 MHz Cortex-M0 core with an ultra-low-power Always-On (AOL) domain that keeps key peripherals alive in Deep Sleep modes down to typical 1.3 µA. This dual-domain partitioning allows active CPU execution and Always-On event monitoring to coexist, making it well suited to battery-powered products that must wake on touch or sensor events while sleeping between interactions.
Typical applications include CAPSENSE™ touch-Button / slider / proximity user interfaces, USB HID peripherals such as mice and keyboards, low-power IoT endpoints with wake-on-touch, industrial control panels, smart-home appliances, e-metering front-ends, and PC peripherals. Designers should plan PCB copper pours carefully because the 64-TQFP-10x10 package has limited thermal headroom under simultaneous USB + ADC + touch-sensing load; a minimum 4-layer stack-up with a continuous ground plane is recommended for industrial designs.
Drop-in alternatives for CY8C4247AZI-L445 — 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 CY8C4247AZI-L445 (same form factor and footprint) — differing in Core, Package, Operating Temperature Range, Programmable Analog Blocks, TCPWM Blocks.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C4247AZI-L423T
✅ Drop-In✓ In Stock
$2.42 / Unit
View Datasheet →CY8C4247AZI-L423T
✅ Drop-In✓ In Stock
$2.42 / Unit
View Datasheet →CY8C4247BZI-L489
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4247BZI-L479
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4246AZI-M445
✅ Drop-In✓ In Stock
$2.52 / Unit
View Datasheet →CY8C4247AZI-L445 Maximum Ratings & Electrical Characteristics
| Series | PSoC™ 4200L (CY8C42xx-L) |
| Core | ARM® Cortex®-M0 (32-bit) |
| Maximum CPU Clock | 48 MHz |
| Package | 64-TQFP (10x10 mm) |
| Programmable Analog Blocks | 4 |
| Programmable Digital Blocks (UDBs) | 4 |
| SAR ADC | 12-bit, 1 Msps |
| USB Controller | USB 2.0 Full-Speed with internal 3-pin |
| TCPWM Blocks | 4 (Timer/Counter/PWM) |
| RoHS Status | Compliant |
CY8C4247AZI-L445 64-tqfp (10x10 mm) Pin Configuration Guide
Pin configuration for CY8C4247AZI-L445 (64-tqfp (10x10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for CY8C4247AZI-L445.
Refer to the datasheet for full pin configuration.
Typical Applications
CY8C4247AZI-L445 is suitable for 7 applications: CAPSENSE™ Touch User Interface, USB HID Peripheral (Mouse / Keyboard / Gamepad), Low-Power IoT Sensor Node, Smart Home Appliance Control, Industrial HMI Front-End, PC Peripheral / Gaming Accessory, Electronic Metering Front-End.
CAPSENSE™ Touch User Interface
The CY8C4247AZI-L445 is built specifically for hardware-accelerated capacitive touch sensing via its on-chip CSD CAPSENSE™ block. With SmartSense™ auto-tuning, designers can deploy up to 36 capacitive buttons, sliders, or proximity sensors without manual PCB compensation, while the 4 UDBs run as additional PWM/Quadrature Decoder logic. The 128 KB flash holds a full CapSense firmware stack with room for gesture firmware and HMI overlays, making this PSoC 4 ideal for white-goods, industrial panels, and PC peripherals.
Recommended
USB HID Peripheral (Mouse / Keyboard / Gamepad)
The CY8C4247AZI-L445 integrates a full-speed USB 2.0 controller with internal 3-pin termination, dramatically reducing external component count in HID peripherals such as keyboards, mice, or gamepad controllers. Its 128 KB flash and 16 KB SRAM host a USB HID class driver plus CAPSENSE™ firmware for trackpad/scroll-wheel inputs. The 48 MHz Cortex-M0 supports HID polling rates up to 1000 Hz with full interrupt latency headroom, and the 1.71–5.5 V supply range supports both 3.3 V USB-regulated and 5 V VBUS-powered designs.
Recommended
Low-Power IoT Sensor Node
The CY8C4247AZI-L445's ultra-low 1.3 µA Deep Sleep current with SRAM retention lets battery-powered IoT nodes sleep for months between sensor events. The Always-On AOL peripheral domain allows RTC-driven or CAPSENSE™ wake-up events to fire without waking the CPU. With its 12-bit SAR ADC sampling at 1 Msps and the 4 IDAC channels for sensor excitation, the PSoC 4 serves as a low-power front-end for environmental, gas, or motion sensor hubs that transmit via an external BLE/Zigbee module.
Recommended
Smart Home Appliance Control
The CY8C4247AZI-L445's combination of 4 programmable analog blocks (for op-amp/comparator/LDT/PGA-low-noise filters), TCPWM motor-control timers, and CAPSENSE™ touch makes it a single-chip solution for smart appliances like coffee machines, washing-machine control panels, and induction cooktops. The 5.5 V maximum VDD tolerates noisy 24 V→5 V supply rails with simple LDO filtering. Infineon's SmartSense™ auto-tuning allows the touch UI to survive water spills and glove-touch, which are critical for kitchen and laundry use-cases.
Recommended
Industrial HMI Front-End
The CY8C4247AZI-L445 supports industrial control panels with a 12-bit SAR ADC sampling at 1 Msps for analog sensor readout (4–20 mA loops via external resistor), CAPSENSE™ for operator buttons, and the USB controller for diagnostic-port connectivity. Its industrial -40 °C to +85 °C temperature grade and 50,000-cycle flash endurance support the long-life requirements of factory-automation equipment. The PSoC 4's UDBs can implement custom Modbus RTU framing in hardware without offloading the CPU.
Recommended
PC Peripheral / Gaming Accessory
The CY8C4247AZI-L445 serves as a USB-attached PC peripheral controller for gaming mice, RGB keyboards, or stream-controller decks, combining CAPSENSE™ slider/button inputs, native USB Full-Speed, and 128 KB flash to host RGB lighting firmware and HID-class drivers. The 4 TCPWM blocks drive addressable RGB LED strips without CPU overhead, and the 4 IDACs drive force-feedback or haptic-driver circuitry. The 48 MHz Cortex-M0 with DMA supports polling rates above 1000 Hz for competitive-gaming mice.
Recommended
Electronic Metering Front-End
The CY8C4247AZI-L445's 12-bit SAR ADC (1 Msps), 4 IDAC channels for sensor excitation, and TCPWM timers for pulse counting make it well suited to e-metering front-ends (electricity, water, or gas meters). The 5.5 V VDD tolerance simplifies connection to 3.6 V Li-SOCl2 battery packs common in metering. The 4 UDBs can implement tamper-detection logic in hardware, offloading the Cortex-M0 CPU for guaranteed response to magnetic tamper events. Lifecycle: 50k flash cycles meet typical 15-year metering lifetime requirements.
Recommended
Recommended Products Summary
Engineering reference data for CY8C4247AZI-L445 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C4247AZI-L423 | CY8C4247AZI-L423T | CY8C4247BZI-L489 | CY8C4247BZI-L479 | CY8C4246AZI-M445 |
|---|---|---|---|---|---|---|
| Package | 64-TQFP (10x10) | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same | 64-TQFP (10x10) - same |
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Program Flash | 128 KB | 128 KB | 128 KB | 128 KB | 128 KB | 64 KB |
| SRAM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| CPU Clock | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz | 48 MHz |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +105 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Supply Voltage | 1.71–5.5 V | 1.71–5.5 V | 1.71–5.5 V | 1.71–5.5 V | 1.71–5.5 V | 1.71–5.5 V |
| USB Controller | USB 2.0 FS, integrated 3-pin | USB 2.0 FS, integrated 3-pin | USB 2.0 FS, integrated 3-pin | USB 2.0 FS, integrated 3-pin | USB 2.0 FS, integrated 3-pin | USB 2.0 FS, integrated 3-pin |
| CAPSENSE™ CSD | Yes (up to 36 channels) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- Industrial -40 °C to +85 °C operating range with full CAPSENSE™ (vs CY8C4247AZI-L423)
- 128 KB flash for full CAPSENSE™ + USB stack + RGB firmware (vs CY8C4246AZI-M445)
- Same-family pin-compatible drop-in to CY8C4247BZI-L489 (vs CY8C4247BZI-L489)
- Integrated USB 2.0 Full-Speed controller with internal 3-pin (vs CY8C4247BZI-L479)
Design Notes
The 64-TQFP-10x10 package has limited thermal headroom under simultaneous USB + ADC + CAPSENSE load. Recommended PCB stack-up: 4-layer FR-4 with the second internal layer as a continuous ground plane; provide at least 25 mm² of top-layer copper pour stitched to GND with 0.3 mm vias on a 1 mm grid to keep junction temperature below 90 °C at 48 MHz full CPU load. Place VDD and VDDD decoupling capacitors within 2 mm of the pins, using 100 nF X7R in parallel with 4.7 µF X5R per the PSoC 4 hardware design considerations guide.
CAPSENSE™ button/slider sensors must be routed on a dedicated layer (no copper pour beneath) and guarded by a hatched ground trace per AN92239. Each CSD pin's series resistor (typically 560 Ω) must be placed within 5 mm of the MCU pin, and the shield electrode must be connected to a dedicated GPIO configured by GPIO vs DRV=0 in firmware. Avoid running noisy USB or PWM traces parallel to CSD sensor traces; cross TRH = 90° if traces must intersect to maintain CAPSENSE™ SNR above 5:1.
Do not omit the external VDDD→VDD core-decoupling capacitor pair (1 µF + 100 nF X7R within 5 mm of pin). Do not route the USB D+/D– traces more than 25 mm or with a 90 Ω differential-impedance mismatch; an improper USB layout causes enumeration issues with no firmware-side fix. Also, when designing for industrial temperature, do not use the L423 commercial-grade variant in place of the L445 — the L423's reduced operating-temperature range can cause CAPSENSE™ SNR drift outside the SmartSense™ compensation window below 0 °C.
The CY8C4247AZI-L445 supports Deep Sleep at ~1.3 µA with full SRAM retention. To minimize sleep current, ensure unused GPIOs are configured as Analog Hi-Z (drive mode 0xC0) rather than the default pull-up state. The AOL domain's RTC can be sourced from the internal WCO (32.768 kHz) to wake the part periodically without an external crystal, but the WCO must be enabled via the clock-tree configuration in PSoC Creator or ModusToolbox firmware.
Compliance Information
RoHS compliant per Infineon product page; AEC-Q100 not applicable (industrial MCU, not automotive qualified). Halogen-free per Infineon PSoC 4 family environmental compliance statement.
