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Infineon Technologies CY8C4126LTI-M445
- Part No.:
- CY8C4126LTI-M445
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 68-VFQFN Exposed Pad
- Datasheet:
-
CY8C4126LTI-M445.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 68QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,129
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Product details
Overview
CY8C4126LTI-M445 from Infineon is a PSoC™ 4100M programmable system-on-chip featuring a 24-MHz Arm® Cortex®-M0 CPU, 128 kB flash, 16 kB SRAM, and integrated capacitive sensing (CSD) with >5:1 SNR. It supports up to 55 GPIOs, operates from 1.71–5.5 V, and delivers 806-Ksps ADC conversion for embedded control in industrial HMI and sensor interface applications.
For engineers reviewing the CY8C4126LTI-M445 datasheet, CY8C4126LTI-M445 pinout, CY8C4126LTI-M445 application, or CY8C4126LTI-M445 equivalent, key selection considerations include Deep Sleep current (20 nA), reconfigurable SCB blocks (I²C/SPI/UART), TCPWM flexibility (center-aligned/edge/pseudo-random), and SmartSense™ automatic tuning for CAPSENSE™.
Technical Context
The device integrates a fixed-function Arm® Cortex®-M0 core with programmable analog (four opamps, two comparators, 12-bit SAR ADC) and digital (eight TCPWM, four SCBs) subsystems routed via configurable interconnect. All opamps and comparators remain functional in Deep Sleep mode, enabling ultra-low-power sensor front-end operation.
Capacitive sensing uses Infineon's proprietary CSD architecture with hardware-accelerated SmartSense™ tuning and water-tolerant electrode design. LCD segment drive is supported on all GPIOs with 4-bit memory retention in Deep Sleep, while the DMA engine offloads CPU during high-throughput ADC or communication transfers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0 @ 24 MHz with single-cycle multiply - enables deterministic real-time control without external math acceleration. |
| Memory | 128 kB flash + 16 kB SRAM - sufficient for complex firmware with bootloader, CAPSENSE™ library, and communication stacks. |
| ADC Performance | 12-bit SAR @ 806 Ksps - supports high-resolution analog monitoring of multiple sensors with minimal CPU overhead. |
| Low-Power Modes | 20 nA Stop Mode with GPIO wakeup - extends battery life in intermittent-sensing applications like smart thermostats. |
| Capacitive Sensing | CSD architecture with >5:1 SNR and water tolerance - enables reliable touch buttons and sliders in humid or wet environments. |
| GPIO Count | Up to 55 programmable pins - supports mixed-signal routing for CAPSENSE™, LCD, analog inputs, and digital interfaces simultaneously. |
| SCB Blocks | Four reconfigurable serial blocks - allows concurrent I²C (sensor hub), SPI (display), and UART (debug/host) without resource conflict. |
Pinout & Package
This device is housed in a 44-pin TQFP package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad. Pin functions are fully configurable via PSoC™ Creator; no fixed hardware-defined pin roles exist beyond power, reset, and SWD debug signals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Supports 1.71–5.5 V operation; decoupling required per datasheet layout guidelines for noise-sensitive analog operation. |
| XRES | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external RC or pushbutton reset circuits. |
| SWDIO / SWCLK | Serial Wire Debug interface | Two-pin debug port supporting programming, real-time tracing, and low-overhead runtime debugging. |
| P0[0]–P9[7] | Programmable GPIO bank | Each pin supports CAPSENSE™, analog input/output, LCD segment/common, or digital I/O with configurable drive strength and slew rate. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense™ auto-tuning | Eliminates manual capacitance calibration during production and compensates for environmental drift in real time. |
| Deep Sleep analog operation | Opamps and comparators remain active at sub-μA current, enabling always-on proximity or wake-on-touch functionality. |
| Reconfigurable TCPWM | Eight independent 16-bit blocks support motor control kill signals, LED dimming, and precision timing with hardware-triggered events. |
| Flexible SCB routing | Each serial block dynamically assigned as I²C master/slave, SPI master/slave, or UART - no fixed peripheral pin assignments. |
| LCD direct drive | Segment and common outputs on any GPIO with 4-bit memory retention in Deep Sleep - reduces BOM by eliminating external LCD drivers. |
Applications
| Industrial HMI Panels | Smart Thermostats |
|---|---|
|
Use Scenario: Touch-enabled control panel with segmented LCD display and temperature/humidity sensing. IC Role / Device Role / Timing Role: Main controller managing CAPSENSE™ buttons, LCD refresh, sensor ADC reads, and HVAC communication via UART. Use Value: Single-chip integration eliminates separate touch controller and display driver, reducing PCB area and bill-of-materials cost. |
Use Scenario: Battery-powered wall-mounted thermostat with wake-on-touch and ambient condition monitoring. IC Role / Device Role / Timing Role: Low-power system controller using Deep Sleep + GPIO wakeup, SAR ADC for sensor reads, and SmartSense™ for responsive UI. Use Value: 20-nA Stop Mode extends coin-cell battery life beyond 5 years while maintaining instant touch responsiveness. |
| Medical Patient Monitors | Appliance Control Boards |
|
Use Scenario: Portable vital sign monitor with capacitive touch interface and analog front-end for ECG/SpO₂ signal conditioning. IC Role / Device Role / Timing Role: Signal acquisition hub using opamp-based instrumentation amplifiers, 12-bit ADC, and CAPSENSE™ for non-mechanical controls. Use Value: Integrated opamps with ADC input buffering reduce external component count and improve noise immunity in sensitive analog paths. |
Use Scenario: Washing machine control board requiring motor PWM, water-level sensing, and user interface with segmented LCD. IC Role / Device Role / Timing Role: System-on-chip handling TCPWM for BLDC motor control, CSD for detergent dispenser touch, and LCD segment drive. Use Value: Eight TCPWM blocks enable simultaneous motor phase control and auxiliary timing tasks without external timers or logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C4127LTI-M485 | Higher flash (256 kB) and SRAM (32 kB); same package and peripheral set. | Better suited for firmware with large protocol stacks (e.g., BLE + USB) or advanced CAPSENSE™ gesture algorithms. | Select when future firmware expansion headroom or dual-bank OTA updates are required. |
| STM32G071KBT6 | Arm® Cortex®-M0+, 64 kB flash, 20 kB SRAM, no integrated CAPSENSE™ or LCD drive; requires external components for touch/LCD. | Lower BOM cost in simple control applications but increases design complexity for touch-enabled devices. | Choose only if CAPSENSE™ and LCD features are unused and third-party touch ICs are already in the design ecosystem. |
Compared with CY8C4126LTI-M445, the CY8C4127LTI-M485 offers scalable memory for feature-rich firmware without changing layout, while the STM32G071KBT6 demands external circuitry for equivalent touch and display functionality - increasing PCB area and validation effort.
Availability
CY8C4126LTI-M445 is available at Aetrix Electronics and suitable for industrial HMI panels, smart thermostats, medical patient monitors, and appliance control boards requiring stable component supply across extended temperature ranges (–40°C to +105°C).
Supply support for CY8C4126LTI-M445 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, and programmable mixed-signal solutions.
CY8C4126LTI-M445 belongs to the PSoC™ 4100M family, designed specifically for cost-sensitive, low-power embedded systems requiring integrated analog front-ends, capacitive sensing, and flexible digital peripherals in a single chip.
FAQ
Does CY8C4126LTI-M445 support USB connectivity?
No, CY8C4126LTI-M445 does not include a USB PHY or controller. It supports UART, I²C, and SPI via its four reconfigurable SCB blocks. For USB host or device functionality, an external USB-to-UART bridge or companion IC is required.
What development tools are required to program this device?
PSoC™ Creator IDE is the official development environment, providing schematic-based design entry, automatic analog/digital routing, and pre-verified CAPSENSE™ and TCPWM components. Code can also be developed using Arm® GCC toolchains after project export.
Can the opamps operate independently of the CPU clock?
Yes - all four opamps remain fully functional in Deep Sleep and Hibernate modes with dedicated low-power biasing. Their output can drive ADC inputs or comparators without CPU intervention, enabling autonomous analog signal conditioning.
Is the 44-pin TQFP package RoHS and REACH compliant?
Yes, CY8C4126LTI-M445 is manufactured in compliance with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full material declarations and compliance documentation are available through Infineon's product change notifications and quality portal.
CY8C4126LTI-M445 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 68-VFQFN Exposed Pad
- Series:
- PSOC™ 4 CY8C41xx - M
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- 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:
- 55
- 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:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C4126LTI-M445 FAQ
1.How can I place an order for CY8C4126LTI-M445 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C4126LTI-M445 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY8C4126LTI-M445 reliable?
The price and inventory of CY8C4126LTI-M445 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C4126LTI-M445 is usually 5 days.
3.What payment methods are accepted for CY8C4126LTI-M445?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C4126LTI-M445 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C4126LTI-M445?
CY8C4126LTI-M445 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C4126LTI-M445 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY8C4126LTI-M445?
For technical support, including CY8C4126LTI-M445 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C4126LTI-M445 requirements.
6.How does Aetrix verify that CY8C4126LTI-M445 is sourced from the original manufacturer or authorized distributors?
All CY8C4126LTI-M445 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY8C4126LTI-M445 meets industry standards.
7.What is the process for return or replacement of CY8C4126LTI-M445?
All CY8C4126LTI-M445 units undergo pre-shipment inspection (PSI). If there is an issue with CY8C4126LTI-M445, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY8C4126LTI-M445 part is unused and in its original packaging.
Return procedure for CY8C4126LTI-M445:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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