CY8C4247AZI-L423ES - PSoC 4200L MCU 48MHz 128KB | Infineon
MPN: CY8C4247AZI-L423ES ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.95 | $7.95 |
| 10 | $7.15 | $71.50 |
| 100 | $6.05 | $605.00 |
| 500 | $5.2 | $2,600.00 |
| 1,000 | $4.55 | $4,550.00 |
CY8C4247AZI-L423ES Overview
A PSoC (Programmable System-on-Chip) is a microcontroller family that pairs a conventional MCU core with Universal Digital Blocks (UDBs) and Universal Analog Blocks (UABs) that the developer can wire into custom peripherals at compile time. Within the broader taxonomy, the PSoC 4200L belongs to the PSoC 4 family, which itself sits under 32-bit ARM Cortex-M microcontrollers and the wider microcontroller and embedded-system hierarchy. This combination of a Cortex-M0 CPU with reconfigurable analog fabric differentiates PSoC from fixed-peripheral MCUs and lets one silicon part implement multiple product variants without board changes.
Key features include active power consumption below 1.2 mA at 3 MHz and a deep-sleep mode of 1.1 µA with SRAM retention. The 12-bit 1 Msps SAR ADC has 16 channels and is supported by four op-amps, two low-power comparators, two 8-bit IDACs, and two 7.5/12-bit VDACs. Communication peripherals include two I2C, three UART, two SPI, USB Full-Speed, CAN, and 36 GPIO with Smart I/O. The device operates from 1.71 V to 5.5 V and the L-series variant adds a segment LCD driver, larger memory and a USB controller compared with baseline PSoC 4000S parts.
The architecture uses a Cortex-M0 core with a 2-cycle 32x32 multiplier and a nested vector interrupt controller. Programmable logic is implemented through UDBs containing PLDs and datapath elements, while analog is implemented through switched-capacitor and continuous-time UABs. This allows peripherals such as custom PWM, quadrature decoders, or sensor front-ends to be synthesized in firmware without an external FPGA or ASIC.
Typical applications include capacitive touch buttons, sliders and proximity sensors for white goods and wearables; USB HID peripherals such as mice, keyboards, and game controllers; low-power glucose meters and portable medical devices; segment-LCD human-machine interfaces for thermostats and instrumentation; and CAN-connected industrial sensor nodes. The device is also used in BLDC fan control and small appliance motor drive subsystems.
A key design consideration is power-budget planning: the low-power modes require the wakeup source and GPIO retention to be configured before sleep, and CapSense® electrodes should be routed with a guarded ground ring to maintain touch SNR. Designers should also evaluate the internal 1.71 V core regulator headroom when the I/O supply is dropped near 1.8 V.
This page synthesizes distributor availability, parametric comparison, and PCB-level design notes not collected in the manufacturer datasheet alone, so procurement and engineering teams can shorten the make-or-buy decision for a CY8C4247AZI-L423ES-based design.
Drop-in alternatives for CY8C4247AZI-L423ES — 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-L423ES (same form factor and footprint) — differing in ADC, Package, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
CY8C4247AZI-L423
✅ Drop-In📋 Reference alternative (not in catalog)
CY8C4247AZI-L423T
✅ Drop-In✓ In Stock
$2.42 / Unit
View Datasheet →CY8C4247AZI-L423ES Maximum Ratings & Electrical Characteristics
| Core | ARM Cortex-M0 |
| Core Width | 32-bit |
| CPU Clock (max) | 48 MHz |
| Flash Memory | 128 KB |
| SRAM | 16 KB |
| Operating Voltage | 1.71 V to 5.5 V |
| ADC | 12-bit SAR, 1 Msps |
| GPIO Count | 36 (approximate) |
| Communication Interfaces | I2C, SPI, UART, USB, CAN |
| USB | USB 2.0 Full-Speed device |
| CapSense | Yes (CapSense Sigma-Delta CSD) |
| LCD Driver | Segment LCD (L-series) |
| Package | 48-pin TQFP (7x7 mm) |
| Operating Temperature | -40C to +85C (industrial) |
| Mounting Type | Surface Mount |
| MSL Level | 3 |
| RoHS Status | Compliant |
| Lead-Free | Yes |
CY8C4247AZI-L423ES Pin Configuration
| Pin 1 | P0.0 — GPIO / analog mux / CapSense |
| Pin 2 | P0.1 — GPIO / analog mux / CapSense |
| Pin 3 | P0.2 — GPIO / analog mux / CapSense |
| Pin 4 | P0.3 — GPIO / analog mux / CapSense |
| Pin 5 | P0.4 — GPIO / analog mux / CapSense |
| Pin 6 | P0.5 — GPIO / analog mux / CapSense |
| Pin 7 | P0.6 — GPIO / analog mux / CapSense |
| Pin 8 | P0.7 — GPIO / analog mux / CapSense |
| Pin 9 | VDD — Power supply 1.71 V to 5.5 V |
| Pin 10 | VSS — Ground |
| Pin 11 | P1.0 — GPIO / analog mux / CapSense |
| Pin 12 | P1.1 — GPIO / analog mux / CapSense |
| Pin 13 | P1.2 — GPIO / analog mux / CapSense |
| Pin 14 | P1.3 — GPIO / analog mux / CapSense |
| Pin 15 | P1.4 — GPIO / analog mux / CapSense |
| Pin 16 | P1.5 — GPIO / analog mux / CapSense |
| Pin 17 | P1.6 — GPIO / analog mux / CapSense |
| Pin 18 | P1.7 — GPIO / analog mux / CapSense |
| Pin 19 | P2.0 — GPIO / analog mux |
| Pin 20 | P2.1 — GPIO / analog mux |
| Pin 21 | P2.2 — GPIO / analog mux |
| Pin 22 | P2.3 — GPIO / analog mux |
| Pin 23 | P2.4 — GPIO / analog mux |
| Pin 24 | P2.5 — GPIO / analog mux |
| Pin 25 | P2.6 — GPIO / analog mux |
| Pin 26 | P2.7 — GPIO / analog mux |
| Pin 27 | P3.0 — GPIO / analog mux |
| Pin 28 | P3.1 — GPIO / analog mux |
| Pin 29 | P3.2 — GPIO / analog mux |
| Pin 30 | P3.3 — GPIO / analog mux |
| Pin 31 | P3.4 — GPIO / analog mux |
| Pin 32 | P3.5 — GPIO / analog mux |
| Pin 33 | P3.6 — GPIO / analog mux |
| Pin 34 | P3.7 — GPIO / analog mux |
| Pin 35 | P4.0 — GPIO / analog mux / SIO |
| Pin 36 | P4.1 — GPIO / analog mux / SIO |
| Pin 37 | P4.2 — GPIO / analog mux / SIO |
| Pin 38 | P4.3 — GPIO / analog mux / SIO |
| Pin 39 | VDDIO — I/O supply voltage |
| Pin 40 | VSS — Ground |
| Pin 41 | XRES — External reset, active low |
| Pin 42 | P5.0 — GPIO / USB D+ |
| Pin 43 | P5.1 — GPIO / USB D- |
| Pin 44 | VDDD — Internal 1.8 V regulator output (decoupling) |
| Pin 45 | VSSD — Digital ground |
| Pin 46 | VDDA — Analog supply (decoupling) |
| Pin 47 | VSSA — Analog ground |
| Pin 48 | VREF — ADC voltage reference (bypass cap) |
Typical Applications
CY8C4247AZI-L423ES is suitable for 6 applications: Capacitive Touch User Interface, USB HID Peripheral Devices, Segment LCD Human-Machine Interface, Battery-Powered Wearable Health Sensor, Industrial CAN Sensor Node, Small Appliance BLDC Motor Control.
Capacitive Touch User Interface
The CY8C4247AZI-L423ES fits capacitive touch interfaces because its integrated CapSense Sigma-Delta (CSD) hardware block scans up to 36 electrodes with a typical SNR greater than 100:1, eliminating the need for an external touch controller. The 48 MHz Cortex-M0 core runs the CapSense firmware plus the application stack, while the 128 KB Flash accommodates tuning tables for buttons, sliders, and proximity sensors. Powered from 1.71 V to 5.5 V, the part supports both 3.3 V and 5 V system rails common in white goods. The 48-pin TQFP package exposes enough GPIO for combined touch buttons plus LED indicators and rotary encoder inputs, simplifying the PCB.
Recommended
USB HID Peripheral Devices
The CY8C4247AZI-L423ES includes a USB 2.0 Full-Speed device controller with integrated transceiver, so it can enumerate as a HID class device (mouse, keyboard, game controller, custom interface) without an external PHY. The 128 KB Flash stores HID descriptors and application code, while the 16 KB SRAM hosts USB endpoint buffers plus CapSense or sensor data. Operating from a 5 V USB VBUS rail with internal 3.3 V regulation, the part directly powers from the bus. The 48-pin TQFP keeps the PCB area small enough for compact peripherals, and the programmable UDBs can emulate additional endpoints or vendor-specific interfaces.
Recommended
Segment LCD Human-Machine Interface
The CY8C4247AZI-L423ES integrates a segment LCD driver that supports up to four common lines and 51 segments, replacing an external LCD controller in thermostats, instrumentation, and small appliances. The L-series silicon enables charge-pump-based contrast adjustment, so the display stays readable at low battery voltages down to 1.71 V. The 12-bit SAR ADC and on-chip temperature sensor feed the display with system measurements, while the Cortex-M0 core runs UI logic and button handling. The 48-pin TQFP keeps the BOM small by merging MCU, LCD driver, touch, and ADC into one IC.
Recommended
Battery-Powered Wearable Health Sensor
The CY8C4247AZI-L423ES suits wearable health sensors thanks to its deep-sleep current of 1.1 µA with SRAM retention and active current below 1.2 mA at 3 MHz / 0.8 V. The 12-bit SAR ADC pairs with the four on-chip op-amps to read photoplethysmography (PPG) or skin-conductance analog front-ends, while the CapSense CSD block adds proximity wake-up without a separate sensor. The 128 KB Flash and 16 KB SRAM are sufficient for an RTOS plus BLE command interface over a companion radio. Operating from a single 3 V coin cell, the part keeps the wearable running for months on a single charge.
Recommended
Industrial CAN Sensor Node
The CY8C4247AZI-L423ES integrates a CAN 2.0B controller, so it can attach to industrial CAN buses without a discrete CAN controller IC. The 12-bit ADC plus on-chip op-amps digitize bridge sensors, thermocouples, or 4-20 mA loops, while the programmable UDBs implement custom protocol wrappers around the CAN payload. Industrial temperature range (-40C to +85C) and 5.5 V tolerance align with 24 V industrial rails after an external LDO. The 48-pin TQFP footprint keeps the sensor node compact inside an M12 connector housing.
Recommended
Small Appliance BLDC Motor Control
The CY8C4247AZI-L423ES can drive small brushless DC motors used in fans, pumps, and appliance blowers through its programmable UDBs that generate the six-step or FOC commutation timing. The 12-bit ADC samples back-EMF or current-sense signals synchronously with the PWM, and the integrated comparators provide hardware cycle-by-cycle overcurrent protection. The 48 MHz Cortex-M0 core runs the speed-control loop and CapSense button interface in firmware, while the segment LCD driver displays RPM and status. The 48-pin TQFP package keeps the BOM small for cost-sensitive appliance designs.
Recommended
Recommended Products Summary
Engineering reference data for CY8C4247AZI-L423ES — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | CY8C4247AZI-L423 | CY8C4247AZI-L423T |
|---|---|---|---|
| Brand | Infineon Technologies | Infineon Technologies | Infineon Technologies |
| Package | 48-TQFP (7x7 mm) | 48-TQFP (7x7 mm) - same | 48-TQFP (7x7 mm) - same |
| Core | ARM Cortex-M0 32-bit | ARM Cortex-M0 32-bit | ARM Cortex-M0 32-bit |
| CPU Clock (max) | 48 MHz | 48 MHz | 48 MHz |
| Flash Memory | 128 KB | 128 KB | 128 KB |
| SRAM | 16 KB | 16 KB | 16 KB |
| USB | USB 2.0 Full-Speed device | USB 2.0 Full-Speed device | USB 2.0 Full-Speed device |
| Ordering Suffix | ES (silicon revision designation) | none (base ordering code) | T (tape and reel packaging) |
Key Differentiators
- ES ordering code designates specific Infineon silicon revision (vs CY8C4247AZI-L423)
- Tray packaging default (vs CY8C4247AZI-L423T)
Design Notes
Estimated: at VDD = 3.3 V and active CPU at 48 MHz with all peripherals on, total current consumption is approximately 6-8 mA; in deep-sleep with SRAM retention it drops to 1.1 µA per the Infineon PSoC 4200L datasheet. Place a 1 µF X7R ceramic bypass capacitor as close as possible to each VDD and VDDIO pin, plus a 0.1 µF on VDDD. Tie VDDA to VDD through a ferrite bead and decouple it with 1 µF plus 0.1 µF to keep ADC noise below 1 LSB.
Route CapSense electrodes with a 0.2 mm gap to the surrounding ground hatch and place a ground ring 1-2 mm wide around each sensor to maximize SNR. According to the Infineon CapSense design guide, the CSD sensing traces should not run parallel to switching signals for more than 5 mm; keep them at least 4 mm away from USB D+/D- and switching regulator feedback nodes.
Do not leave the XRES pin floating - it must be pulled to VDDIO through a 10 kohm resistor for normal operation, otherwise the device stays in reset. The P5.0/P5.1 USB D+/D- pins require 22 ohm series resistors plus a 1.5 kohm pull-up on D+ for full-speed enumeration. When using the internal 1.8 V regulator (VDDD), add the recommended 1 µF capacitor on pin 44 to prevent core instability during sleep wake-up transitions.
Compliance Information
RoHS and REACH compliance per Infineon product page. Industrial temperature grade only; AEC-Q100 not applicable as this is not an automotive-qualified variant.
