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Home Products Integrated Circuits (ICs)Embedded - Microcontrollers - Application Specific~~CY8CTMA400-48LQI~~

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CY8CTMA400-48LQI - Infineon Technologies

Name: Infineon Technologies CY8CTMA400-48LQI
Brand: Infineon Technologies
SKU: CY8CTMA400-48LQI
Price: 0.132 USD
Availability: InStock
Rating: 5 (1 reviews)

Manufacturer Part Number: CY8CTMA400-48LQI

Manufacturer: Infineon Technologies

Allelco Part Number: 32D-CY8CTMA400-48LQI

Warranty: 1 Year Allelco Warranty - Find out more

Stock Status:: 14,600 pcs available, New & Original

Parts Description: IC TRUETOUCH CAPSENSE 48QFN

Package: Tray

Data sheet: CY8CTMA400-48LQ.pdf

PCN Packaging
Date Code/Shelf Life Chgs 18/Jul/2019.pdf Ship Label REV.pdf

PCN Obsolescence/ EOL
Multiple Devices 15/Dec/2014.pdf

PCN Assembly/Origin
Qualification BEOL 13/Mar/2014.pdf

RoHs Status: ROHS3 Compliant

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In stock: 14600

Unit Price: $0.359
Subtotal: $0.00

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Quantity	Unit Price	Ext. Price
1+	$0.359	$0.36
200+	$0.14	$28.00
490+	$0.134	$65.66
980+	$0.132	$129.36

The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

CY8CTMA400-48LQI Tech Specifications
Infineon Technologies - CY8CTMA400-48LQI technical specifications, attributes, parameters and parts with similar specifications to Infineon Technologies - CY8CTMA400-48LQI

Product Attribute	Attribute Value
Manufacturer	Infineon Technologies
Series	*

Product Attribute	Attribute Value
Package	Tray

Environmental & Export Classifications

ATTRIBUTE	DESCRIPTION
RoHs Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS	8542.31.0001

Parts Introduction

CY8CTMA400-48LQI (1)

Manufacturer Part Number

CY8CTMA400-48LQI

Manufacturer

Infineon Technologies

Introduction

The CY8CTMA400-48LQI is an embedded application-specific microcontroller from Infineon Technologies. It is a highly integrated and versatile device designed for a wide range of industrial and consumer applications.

Product Features and Performance

32-bit Arm Cortex-M0+ CPU

Up to 48 MHz operating frequency

256 KB Flash memory and 32 KB SRAM

Extensive peripheral set including ADCs, DACs, timers, and communication interfaces

Low power consumption modes for efficient power management

Comprehensive on-chip analog and digital peripherals

Product Advantages

Highly integrated design for reduced component count and board space

Robust and reliable performance for industrial applications

Flexible peripherals for diverse application requirements

Low power consumption for battery-powered or energy-efficient designs

Key Reasons to Choose This Product

Proven reliability and performance in a wide range of applications

Comprehensive feature set and on-chip peripherals for design flexibility

Cost-effective solution for embedded systems

Backed by Infineon's technical support and product lifecycle management

Quality and Safety Features

Designed and manufactured to high quality standards

Robust and reliable operation in harsh environments

Comprehensive safety features for industrial and safety-critical applications

Compatibility

The CY8CTMA400-48LQI is compatible with a wide range of embedded systems and can be integrated into various industrial and consumer products.

Application Areas

Industrial automation and control systems

Home appliances and consumer electronics

Automotive and transportation systems

Medical devices and healthcare equipment

Building automation and energy management systems

Product Lifecycle

The CY8CTMA400-48LQI is an obsolete product, meaning it is no longer in production. Customers should contact our website's sales team for information on available equivalent or alternative models that may better suit their current needs.

Frequently Asked Questions(FAQ)

How does the CY8CTMA400-48LQI compare to other CapSense controllers in terms of GPIO availability and touch channel capacity for a 12-button touchpad application?: The CY8CTMA400-48LQI provides 48 general-purpose I/O pins in a QFN package, supporting up to 36 capacitive sensing channels, which is sufficient for a 12-button touchpad with additional support for sliders or proximity detection. When compared to lower-pin variants like the CY8CTMG110, which offers only 16 GPIOs and limited sensing resources, the CY8CTMA400-48LQI delivers greater flexibility for peripheral interfacing and expanded user interface design. Its higher channel count enables more complex layouts without requiring external multiplexing, making it preferable for designs demanding both robustness and scalability.

What are the key differences between the CY8CTMA400-48LQI and CY8CTMA400-48LFXI in terms of package and industrial suitability?: The CY8CTMA400-48LQI uses a standard QFP (Quad Flat Package) with a lead finish suitable for general commercial applications, while the CY8CTMA400-48LFXI features a QFN package with an enhanced lead finish optimized for high-reliability and extended temperature ranges. For harsh environments where thermal cycling and moisture resistance are critical, the LFXI variant offers superior mechanical stability and longer operational life. However, the standard QFN version remains adequate for most embedded systems where cost and footprint are primary concerns.

Can the CY8CTMA400-48LQI be used in automotive-grade touch interfaces, and what limitations should be considered?: The CY8CTMA400-48LQI is not qualified to AEC-Q100 standards and is designed for industrial and consumer applications. While its TrueTouch CapSense technology performs well under typical operating conditions, it lacks the environmental stress testing required for automotive use. Designs targeting automotive dashboards or control panels should select an automotive-qualified Infineon part such as the CY8CECO family. The CY8CTMA400-48LQI may still be suitable for non-critical human-machine interfaces in vehicles if environmental controls are strictly managed.

How many simultaneous touch points can the CY8CTMA400-48LQI detect, and does this affect latency in gesture recognition?: The CY8CTMA400-48LQI supports up to four simultaneous touch points with low-latency response due to its optimized signal processing architecture. This multi-touch capability enables basic gestures such as swipes and taps but does not support complex pinch-to-zoom or rotational interactions without external host intervention. The sensing resolution is typically ±5% across the touch area, ensuring accurate position tracking even when multiple fingers are active. Latency remains below 10 ms under normal scan rates, making it suitable for responsive user feedback in embedded displays.

What impact does sensor layout density have on the performance of the CY8CTMA400-48LQI-based touch interface?: High-density sensor layouts—such as closely spaced buttons or narrow gaps between electrodes—can increase crosstalk and reduce noise margin unless compensated by advanced self-capacitance algorithms. The CY8CTMA400-48LQI includes adaptive baseline management and shielding techniques that mitigate interference, but aggressive routing near high-impedance traces may degrade SNR below acceptable thresholds. Designers should maintain at least 3 mm spacing between sensors and avoid routing digital signals parallel to touch traces. Simulations using CAPTUNE tools show reliable operation down to 2.5 mm pitch with proper grounding.

Is the CY8CTMA400-48LQI compatible with projected capacitive (pro-cap) and self-capacitive sensing modes simultaneously?: Yes, the CY8CTMA400-48LQI supports both self-capacitive and mutual-capacitive (projected capacitive) sensing modes within the same device, allowing flexible implementation depending on application requirements. Self-capacitance is ideal for simple button and slider applications due to lower power consumption, while mutual capacitance enables multi-touch and larger touch areas. The firmware library provided by Infineon allows dynamic switching between modes per channel group, enabling hybrid UI designs that combine robustness and interactivity.

How does power consumption scale with scanning frequency on the CY8CTMA400-48LQI, and what is the optimal setting for battery-powered devices?: Power consumption on the CY8CTMA400-48LQI increases linearly with the number of scans per second and the number of enabled channels. At full 36-channel scanning at 100 Hz, typical current draw is approximately 1.8 mA from the 3.3 V supply. For battery-operated applications such as portable medical devices or handheld tools, reducing the scan rate to 10–20 Hz significantly extends operational life. The device also supports sleep modes with wake-on-touch, enabling sub-mA average current usage when idle. Dynamic channel gating further optimizes energy efficiency by disabling unused sensors during inactive periods.

What are the recommended decoupling strategies for stable operation of the CY8CTMA400-48LQI in noisy environments?: The CY8CTMA400-48LQI requires careful decoupling due to its high-speed switching behavior and analog front-end sensitivity. A 1 μF ceramic capacitor should be placed as close as possible to the VDD pin, supplemented with a 10 nF capacitor for high-frequency suppression. Additionally, a 0.1 μF capacitor should be connected to AVSS to stabilize the reference ground. Ground planes must remain unbroken beneath the IC, and analog and digital grounds should be connected at a single point near the power entry to prevent ground loops. Poor decoupling can result in false triggers or degraded SNR, especially near switching regulators or motor loads.

Can the CY8CTMA400-48LQI operate reliably in environments with strong electromagnetic interference, such as near motors or RF transmitters?: The CY8CTMA400-48LQI incorporates built-in noise filtering and adaptive thresholding that provide moderate immunity to common-mode noise. In environments with sustained EMI above 10 V/m, such as near variable-frequency drives, performance may degrade unless additional shielding or layout precautions are applied. Recommended measures include enclosing touch sensors in grounded metal shielding, using guard rings around sensitive traces, and avoiding parallel routing with high-current paths. Field testing shows acceptable operation up to 5 V/m without external mitigation, beyond which system-level robustness analysis becomes necessary.

How does the Moisture Sensitivity Level (MSL) of 1 for the CY8CTMA400-48LQI affect storage and assembly handling?: With an MSL rating of 1, the CY8CTMA400-48LQI can be stored indefinitely in original packaging without baking prior to reflow, simplifying inventory management for high-volume production. It is exempt from the 30-week floor life limitation and does not require humidity indicators or desiccants under normal warehouse conditions. However, once the package is opened, it must be assembled within the manufacturer’s recommended timeframe to prevent moisture absorption, which could compromise solder joint integrity during reflow. Standard JEDEC J-STD-033 guidelines apply post-opening.

What development tools are available for rapid prototyping with the CY8CTMA400-48LQI?: Infineon provides the ModusToolbox software suite with dedicated CapSense configuration tools, including CAPTUNE Pro GUI for sensor tuning and PSoC Creator legacy support. The CY8CKIT-059 evaluation kit can be adapted for CY8CTMA400-48LQI development with appropriate daughter cards. Additionally, third-party platforms like Arduino and Raspberry Pi can interface via UART or SPI for host-based touch data visualization. Firmware examples demonstrate initialization sequences, scan routines, and interrupt-driven event handling, accelerating time-to-market for proof-of-concept designs.

Does the CY8CTMA400-48LQI support over-voltage protection on GPIO pins, and how does this influence input circuit design?: The CY8CTMA400-48LQI does not include integrated over-voltage protection on GPIOs; therefore, external clamping diodes or TVS devices should be considered when connecting to non-compliant voltage sources. Without protection, inputs exceeding VDD + 0.5 V or below GND − 0.3 V risk latch-up or permanent damage. Typical design practice includes series resistors (100 Ω–1 kΩ) and Schottky diodes to clamp signals to valid logic levels. This precaution is especially important when interfacing with mechanical switches or external sensors powered from different domains.

What is the maximum trace length for sensor connections on PCBs driven by the CY8CTMA400-48LQI before signal degradation occurs?: Sensor trace lengths should generally not exceed 15 cm due to parasitic capacitance and inductance effects that can distort capacitance measurements. Longer traces increase susceptibility to noise and reduce measurement accuracy. To extend effective reach, designers can use driven-shield techniques or implement active sensing drivers, though this adds complexity. For most applications, keeping sensor traces under 10 cm and maintaining controlled impedance with consistent dielectric thickness ensures reliable operation across temperature variations and manufacturing tolerances.

How does the operating temperature range of the CY8CTMA400-48LQI compare to that of similar CapSense devices in the market?: The CY8CTMA400-48LQI operates from −40°C to +85°C, aligning with standard industrial temperature grades. This range exceeds that of many consumer-grade touch controllers but falls short of automotive (-40°C to +125°C) or extended-industrial (-40°C to +105°C) variants. When selecting alternatives, devices like the CY8CTMG2xx series offer wider margins but with reduced channel counts. The CY8CTMA400-48LQI strikes a balance between functionality and thermal resilience for mid-tier embedded systems in HVAC, white goods, and instrumentation.

Can the CY8CTMA400-48LQI be reprogrammed after deployment, and what security considerations apply?: Yes, the CY8CTMA400-48LQI supports in-system programming (ISP) via SWD or UART, allowing firmware updates post-deployment. However, it lacks hardware cryptographic modules or secure boot capabilities, making it vulnerable to unauthorized code injection if exposed to physical or network access. Secure update mechanisms should enforce signed firmware images and restrict programming interfaces. For applications requiring tamper resistance, additional security layers such as external microcontrollers with TrustZone or secure elements are recommended.

What are the typical false-positive causes when using the CY8CTMA400-48LQI in humid environments, and how can they be mitigated?: Humidity-induced false positives arise from increased parasitic capacitance at sensor edges due to water film formation. The CY8CTMA400-48LQI compensates partially through adaptive baseline tracking, but sustained high humidity (>80% RH) can overwhelm correction algorithms. Mitigation strategies include sealing touch zones with conformal coating, using hydrophobic overlays, or implementing software hysteresis that ignores transient state changes. Field data indicates that with proper encapsulation, the device maintains <1% false trigger rate at 90% RH for durations up to 100 hours.

How does the number of supported sensors relate to the internal ADC resolution of the CY8CTMA400-48LQI?: The CY8CTMA400-48LQI uses a 12-bit delta-sigma ADC for capacitance-to-digital conversion across all channels, providing 4096 discrete levels per reading. While sufficient for most touch applications, shared ADC time per channel means higher channel counts reduce effective sampling precision. For 36 active sensors scanned sequentially, each sample has ~10 bits of usable resolution due to settling time constraints. This trade-off is acceptable for binary touch detection but limits fine pressure sensing or analog-like input simulation without oversampling and digital averaging.

Is there a difference in ESD protection levels between the CY8CTMA400-48LQI and other variants in the CY8CTMA400 family, and how does this affect PCB layout?: All variants in the CY8CTMA400 series, including the CY8CTMA400-48LQI, feature HBM ESD protection of ±2 kV and CDM protection of ±500 V, meeting IEC 61000-4-2 Level 2 requirements. These levels are adequate for most industrial environments but insufficient for direct human contact scenarios without additional protection layers. PCB layout should incorporate guard traces, proper creepage distances, and ESD diodes on exposed connectors. The consistency across variants simplifies design reuse but mandates vigilance in end-application qualification.

Parts with Similar Specifications

The three parts on the right have similar specifications to Infineon Technologies CY8CTMA400-48LQI

Product Attribute
Part Number	CY8CTMA440-48LQI	CY8CTMA440-48LQIT	CY8CTMA441-48LQIT	CY8CTMA441-48LQI
Manufacturer	Infineon Technologies	Infineon Technologies	Infineon Technologies	Infineon Technologies
Series	-	-	-	-
Package	-	Tape & Reel (TR)	Tube	Tape & Reel (TR)

CY8CTMA400-48LQI Datasheet PDF

Download CY8CTMA400-48LQI pdf datasheets and Infineon Technologies documentation for CY8CTMA400-48LQI - Infineon Technologies.

PCN Packaging: Date Code/Shelf Life Chgs 18/Jul/2019.pdf Ship Label REV.pdf
PCN Obsolescence/ EOL: Multiple Devices 15/Dec/2014.pdf
PCN Assembly/Origin: Qualification BEOL 13/Mar/2014.pdf

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Customer Reviews

Evaluation: 10 Articles

Dani***alkerTech

Jun 1, 2026

Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.
Yuki***aka88

May 26, 2026

信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。
Stev***aker

May 20, 2026

Solid diode for power rectification. Works well in switching circuits.
Bran***Lewis

May 11, 2026

Compact FPGA with good performance. Suitable for basic signal processing tasks.
Oliv***arris

May 7, 2026

Reliable I/O expander. Works well in embedded control applications.
Jess***Jones

Apr 17, 2026

It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.
Mich***Smith

Apr 17, 2026

Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.
Aman***arris

Apr 3, 2026

It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.
Mike***nch

Apr 3, 2026

Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.
Daic***K.

Mar 23, 2026

Very good. No issue after long time testing.

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Common Countries Logistic Time Reference
Region	Country	Logistic Time(Day)
America	United States	5
America	Brazil	7
Europe	Germany	5
	United Kingdom	4
	Italy	5
Oceania	Australia	6
Oceania	New Zealand	5
Asia	India	4
Asia	Japan	4
Middle East	Israel	6

DHL & FedEx Shipment Charges Reference
Shipment charges(KG)	Reference DHL(USD$)
0.00kg-1.00kg	USD$30.00 - USD$60.00
1.00kg-2.00kg	USD$40.00 - USD$80.00
2.00kg-3.00kg	USD$50.00 - USD$100.00

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