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Home > Products > Integrated Circuits (ICs) > Embedded - Application Specific Microcontrollers > CY8CTMA545-44LQI
Infineon Technologies
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CY8CTMA545-44LQI

In Stock 25361 pcs Reference Price(In US Dollars)
1+
$4.1524
200+
$1.6067
490+
$1.5511
980+
$1.5226
Manufacturer Part Number:
CY8CTMA545-44LQI
Manufacturer / Brand
Infineon Technologies
Part of Description:
IC TRUETOUCH CAPSENSE 44QFN
Datasheets:
CY8CTMA545-44LQI(1).pdfCY8CTMA545-44LQI(2).pdfCY8CTMA545-44LQI(3).pdfCY8CTMA545-44LQI(4).pdfCY8CTMA545-44LQI(5).pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 25361 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number CY8CTMA545-44LQI
Manufacturer / Brand Infineon Technologies
Stock Quantity 25361 pcs Stock
Category Integrated Circuits (ICs) > Embedded - Application Specific Microcontrollers
Description IC TRUETOUCH CAPSENSE 44QFN
Lead Free Status / RoHS Status: ROHS3 Compliant
Series *
Package Tray
Condition New Original Stock
Warranty 100% Perfect Functions
Lead Time 2-3days after payment.
Payment Credit Card / PayPal / Telegraphic Transfer (T/T) / Western Union
Shipping by DHL / Fedex / UPS / TNT
Port HongKong
RFQ Email Info@IC-Components.com

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

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PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: PayPal@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

Can the CY8CTMA545-44LQI operate reliably in industrial temperature environments with frequent thermal cycling?
The CY8CTMA545-44LQI is rated for operation from -40°C to +85°C, which meets standard industrial temperature requirements. However, long-term reliability under rapid thermal cycling depends on PCB material selection, solder joint integrity, and mechanical stress management. Engineers should verify that the board design mitigates coefficient of thermal expansion (CTE) mismatches between components and substrate.
What are the limitations of using the CY8CTMA545-44LQI for capacitive touch sensing in high-noise environments such as near switching power supplies?
While the device includes noise filtering and adaptive algorithms, sustained electromagnetic interference (EMI) from switching regulators can compromise touch sensitivity. Engineers should implement proper grounding, shielding, and consider adding RC filters or relocating sensors away from noisy circuitry. Layout symmetry and guard traces are critical for maintaining signal integrity.
How does the I²C interface voltage level affect compatibility when integrating the CY8CTMA545-44LQI with 3.3V microcontrollers?
The CY8CTMA545-44LQI supports programmable I/O voltage up to 5.5V, allowing direct connection to 3.3V I²C masters without level shifting. However, pull-up resistors must be selected based on both bus capacitance and voltage rails to ensure proper rise times and avoid signal degradation during fast mode operations.
Can the CY8CTMA545-44LQI replace legacy PSOC devices in existing designs without modifying firmware or sensor layout?
Partial migration is possible, but differences in scan algorithms, electrode configuration registers, and interrupt handling may require firmware adjustments. Sensor layout compatibility depends on pin mapping and electrode count. Engineers should validate touch response through prototyping before full migration.
What clock source options are available for timing-critical applications using the CY8CTMA545-44LQI?
The device supports internal precision oscillators (typically ±1% accuracy), external crystals up to 24 MHz, and internal low-power RC oscillators. For capacitive sensing timing, the internal oscillator is usually sufficient, but external crystals improve consistency across temperature and supply variations.
Is it feasible to use the CY8CTMA545-44LQI in battery-powered devices requiring sub-1µA sleep current?
Yes, the device offers deep sleep modes with consumption as low as 100nA. However, wake-up latency increases significantly in ultra-low-power states. Engineers must balance responsiveness against power budget and consider disabling non-essential peripherals during sleep.
What precautions should be taken when replacing the CY8CTMA545-44LQI with a different Cypress TrueTouch controller?
Pin compatibility and register mapping vary between models. Engineers must consult updated datasheets, verify I²C addressing, and revalidate touch performance. Firmware abstraction layers may help, but sensor calibration data often cannot be transferred directly between parts.
How does electrode size affect the detection range and robustness of touch inputs on the CY8CTMA545-44LQI?
Larger electrodes increase touch area but may reduce multi-touch resolution. Smaller electrodes offer finer control but are more susceptible to environmental noise. Optimal sizing depends on user interaction patterns and requires empirical tuning via the Touch Sense Studio software.
Can multiple CY8CTMA545-44LQI devices share an I²C bus without address conflicts?
Each device must have a unique I²C slave address. The CY8CTMA545-44LQI allows address configuration via dedicated pins, enabling up to four devices on a single bus. Proper pull-ups and bus loading analysis are essential to maintain signal integrity at higher frequencies.
Are there any known issues with moisture resistance or conformal coating when using the CY8CTMA545-44LQI in humid environments?
The device itself is not rated for immersion, but standard conformal coatings are generally compatible if applied after assembly. Engineers should avoid excessive coating near sensor pads and test for false triggers due to dielectric changes caused by moisture absorption.
What is the maximum number of simultaneous touch points supported by the CY8CTMA545-44LQI?
The CY8CTMA545-44LQI supports up to 50 individual touch channels and can track 10 simultaneous touches. Performance depends on electrode density, scanning frequency, and firmware configuration. Higher channel counts increase power consumption and processing load.
How should engineers handle ESD protection when connecting user interfaces controlled by the CY8CTMA545-44LQI?
Although the device has built-in ESD protection, external protection diodes or transient voltage suppressors (TVS) are recommended for human interface elements like buttons or sliders. Placement close to connectors and proper grounding minimize risk of latch-up during discharge events.
Can the CY8CTMA545-44LQI operate from a 1.8V supply rail in low-voltage systems?
Yes, the core logic operates down to 1.7V, and many I/Os support bidirectional voltage translation. However, analog sections such as ADC or reference circuits may have reduced performance below 2.7V. Engineers should verify analog block functionality in their specific configuration.
What impact does sensor pad geometry have on mutual capacitance vs. self-capacitance sensing in the CY8CTMA545-44LQI?
Mutual capacitance (Tx-Rx pairs) enables multi-touch but requires precise alignment; self-capacitance uses single electrodes and simplifies layout. The CY8CTMA545-44LQI supports both modes, but switching between them affects channel allocation, scan speed, and noise immunity—requiring careful trade-off analysis per application needs.
Is firmware backward compatibility maintained across different revisions of the CY8CTMA545-44LQI?
Firmware compiled for one revision typically runs on later versions unless major architectural changes occur. However, engineers should always validate behavior after updates, especially around timing-sensitive routines or peripheral initialization sequences.

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Infineon Technologies

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In Stock: 25361

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