Infineon Technologies CY8C4126AZI-M443

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Product attributes Property Value
Manufacturer Infineon Technologies
Product Series PSOC™ 4 CY8C41xx - M
Packaging Marketplace | Tray
Core Processor ARM® Cortex®-M0
Core Size 32-Bit Single-Core
Speed 24MHz
Connectivity I2C, IrDA, LINbus, Microwire, SmartCard, SPI, SSP, UART/USART
Peripherals Brown-out Detect/Reset, CapSense, LCD, LVD, POR, PWM, WDT
Number of I/O 38
Program Memory Size 64KB (64K x 8)
Program Memory Type FLASH
EEPROM Size -
RAM Size 8K x 8
Voltage - Supply (Vcc/Vdd) 1.71V ~ 5.5V
Data Converters A/D 16x12b SAR; 2xIDAC
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 48-TQFP (7x7)
Package / Case 48-LQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The CY8C4126AZI-M443 from Infineon is a versatile ARM Cortex-M0 microcontroller designed for low-power and touch-sensing applications. It operates from 1.71V to 5.5V, runs at 24MHz, and features 64KB flash and 8KB SRAM. Integrated CapSense, LCD driver, and multiple serial interfaces make it ideal for HMI, industrial, and consumer products. The 48-LQFP package and extended temperature range support demanding environments.

  • Integrated CapSense: Eliminates external touch ICs, reducing cost and PCB area while improving design flexibility.
  • Wide Voltage Range (1.71V-5.5V): Supports both 3.3V and 5V systems, simplifying power supply design and enabling direct battery operation.
  • Low Power Consumption: Multiple sleep modes and fast wake-up extend battery life in portable devices.
  • Rich Analog Peripherals: Includes ADC, comparators, and current DACs for precise sensor interfacing.
  • Robust Protection: Brown-out detect, low-voltage detect, and watchdog timer enhance system reliability.

Industrial Human-Machine Interface (HMI)

With integrated CapSense, the CY8C4126AZI-M443 can implement capacitive touch buttons, sliders, and proximity sensors without external components, reducing BOM cost and improving reliability in industrial panels.

Portable Medical Devices

The wide 1.71V to 5.5V supply range and low-power modes enable battery-operated glucose meters, pulse oximeters, and thermometers. The LCD driver simplifies segmented display integration.

Smart Home Controllers

Use the PWM and analog peripherals to control lighting, motorized blinds, and environmental sensors. The 24MHz Cortex-M0 provides enough processing for real-time control loops.

Automotive Aftermarket Accessories

Operating from -40°C to 85°C, this MCU suits car alarm systems, window lift controllers, and interior lighting modules. The robust I/O tolerates automotive voltage transients.

Consumer Electronics

Implement touch-sensitive interfaces for kitchen appliances, wearables, and remote controls. The small 48-LQFP package fits space-constrained PCBs.

IoT Sensor Nodes

Combine the MCU with external sensors to create low-power environmental monitoring nodes. The brown-out detect and watchdog ensure reliable operation in remote deployments.

Q: What is the operating voltage range of the CY8C4126AZI-M443?
A: It operates from 1.71V to 5.5V, making it suitable for battery and 5V systems.
Q: Does this MCU support capacitive touch sensing?
A: Yes, it includes CapSense technology for reliable touch and proximity sensing.
Q: What is the maximum CPU speed?
A: The ARM Cortex-M0 core runs at up to 24 MHz.
Q: What package is available?
A: It comes in a 48-pin LQFP package.
Q: What are the memory resources?
A: It has 64KB flash and 8KB SRAM.
Base Product Number : CY8C4126AZI
32-bit MCU 48-LQFP ARM Cortex-M0 CapSense HMI industrial Infineon LCD low power touch sensing
Q: What is the operating voltage range of the CY8C4126AZI-M443?
A: It operates from 1.71V to 5.5V, making it suitable for battery and 5V systems.
Q: Does this MCU support capacitive touch sensing?
A: Yes, it includes CapSense technology for reliable touch and proximity sensing.
Q: What is the maximum CPU speed?
A: The ARM Cortex-M0 core runs at up to 24 MHz.
Q: What package is available?
A: It comes in a 48-pin LQFP package.
Q: What are the memory resources?
A: It has 64KB flash and 8KB SRAM.