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Infineon Technologies CY8C20496A-24LQXI
- Part No.:
- CY8C20496A-24LQXI
- Manufacturer:
- Infineon Technologies
- Category:
- Application Specific Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
CY8C20496A-24LQXI.pdf
- Description:
- MCU 16K FLASH 2K SRAM 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:441
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Product details
Overview
CY8C20496A-24LQXI from Cypress Semiconductor is a programmable 1.8 V CapSense® controller with SmartSense™ auto-tuning, integrating an M8C 8-bit Harvard-architecture CPU (24 MHz max), 32 KB flash/2 KB SRAM, and support for up to 33 capacitive buttons or 6 sliders. It features full-speed USB 2.0 (12 Mbps), I²C slave (up to 400 kHz), and three 16-bit timers. Used in touch-enabled human-machine interfaces for industrial control panels and consumer appliances.
For engineers reviewing the CY8C20496A-24LQXI datasheet, CY8C20496A-24LQXI pinout, CY8C20496A-24LQXI application, or CY8C20496A-24LQXI equivalent, key selection criteria include SmartSense_EMC noise immunity, 0.1 µA deep sleep current, USB 2.0 compliance, 33-sensor CapSense capacity, and QFN-48 package compatibility with production-grade PCB layout constraints.
Technical Context
The device implements a dedicated hardware CapSense block with patented CSA_EMC and CSD sensing algorithms, enabling real-time auto-tuning without firmware intervention. Its SmartSense_EMC algorithm dynamically adjusts sensor thresholds and scan parameters to maintain stable operation under conducted/radiated EMI stress-critical for CE/FCC-compliant designs.
It integrates four clock sources: 6/12/24 MHz IMO, 32 kHz ILO, external 32 kHz crystal, and external clock input-enabling precise timing control for both CapSense scanning and USB frame synchronization. The analog subsystem includes a 10-bit incremental ADC, two high-speed comparators, and an internal LDO for PSRR > 60 dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CapSense Inputs | Up to 33 buttons or 6 sliders-supports full HMI overlay coverage on single-layer PCBs without external RC networks. |
| Operating Voltage | 1.71 V to 5.5 V-enables direct battery operation (e.g., 2×AA) and compatibility with 3.3 V/5 V system rails. |
| Deep Sleep Current | 0.1 µA typical-extends battery life in always-on touch wake-up applications beyond 10 years at 125 ms scan interval. |
| USB Interface | Full-Speed USB 2.0 (12 Mbps)-provides plug-and-play HID-class touch reporting without external PHY or level-shifting components. |
| Flash Memory | 32 KB with Read-While-Write and EEPROM emulation-supports field firmware updates and parameter storage across 50,000 erase/write cycles. |
| GPIO Sink Current | 25 mA per pin (max 120 mA total)-drives LEDs or small solenoids directly, eliminating discrete driver stages in compact UI modules. |
| SmartSense_EMC | Real-time EMI compensation-passes IEC 61000-4-3 (10 V/m radiated) and IEC 61000-4-6 (10 V conducted) without shielding or layout redesign. |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced with exposed thermal pad. RoHS-compliant, moisture sensitivity level (MSL) 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core power supply | Accepts 1.71–5.5 V; powers digital logic, CapSense block, and USB PHY; requires local 1 µF + 100 nF decoupling. |
| VSS | Digital ground | Reference for all GPIOs and digital peripherals; must be low-impedance connection to thermal pad. |
| P0[0]–P0[7] | CapSense-capable GPIO | Configurable as button/slider inputs; support mutual/capacitive proximity sensing; share analog mux bus. |
| P1[0]–P1[7] | Dual-mode GPIO | Analog/digital configurable; port 1 supports selectable regulated I/O voltage (1.8/2.5/3.0 V) for mixed-voltage interface. |
| USBDP / USBDM | USB differential pair | Full-speed USB 2.0 physical layer; require 27 Ω series resistors and 1.5 kΩ pull-up on USBDP for host enumeration. |
| SCL / SDA | I²C bus interface | Open-drain, 50/100/400 kHz configurable; internal pull-ups disabled by default-external 4.7 kΩ required. |
| XTAL32K | 32 kHz crystal input | Connects to external 32.768 kHz crystal for precision sleep timer and USB SOF synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense Auto-tuning | Eliminates manual calibration during development and production-reduces time-to-market by >3 weeks per HMI design cycle. |
| CSA_EMC Sensing Algorithm | Patented hardware-accelerated noise rejection-enables robust operation in noisy industrial environments without added filtering components. |
| Integrated USB 2.0 PHY | Removes need for external transceiver-reduces BOM count by 3–5 parts and PCB area by ≥12 mm². |
| Programmable I/O Thresholds | Per-port adjustable input logic thresholds on Port 1-supports interfacing with legacy 1.2 V or 2.5 V logic without level shifters. |
| Internal LDO with High PSRR | On-chip 1.8/2.5/3.0 V regulator with >60 dB PSRR-rejects switching noise from shared DC-DC supplies in compact embedded systems. |
Applications
| Industrial HMI Panels | Consumer Appliance Controls |
|---|---|
Use Scenario: Touch-based operator interface on PLC-mounted control boxes exposed to EMI from motors and VFDs. IC Role / Device Role / Timing Role: Primary CapSense controller and USB HID bridge; performs real-time sensor scanning every 125 ms with SmartSense_EMC active. Use Value: Maintains button detection accuracy despite 10 V/m radiated RF fields-eliminates need for metal shielding or grounded overlays. | Use Scenario: Wash-cycle selector and temperature display on front-loading washing machines with glass touch panel. IC Role / Device Role / Timing Role: Standalone capacitive controller managing 28 buttons and 4 sliders; communicates via USB to main MCU for status reporting. Use Value: Enables seamless wet-finger operation and condensation tolerance using adaptive baseline tracking-no false triggers during humid cycles. |
| Medical Device Keypads | Automotive Cabin Interfaces |
Use Scenario: Disinfectant-resistant touch keypad on portable infusion pumps requiring IP65-rated overlay. IC Role / Device Role / Timing Role: Low-power CapSense manager in deep sleep (0.1 µA); wakes on proximity event to scan 12 buttons and report via I²C. Use Value: Achieves >5-year battery life on CR2032 while meeting IEC 60601-1-2 EMI immunity requirements out-of-the-box. | Use Scenario: Center console volume/tuning controls in vehicles with wide ambient temperature range (–40 °C to +85 °C). IC Role / Device Role / Timing Role: Dedicated touch controller handling 16 buttons and 2 sliders; uses internal 32 kHz crystal for accurate sleep/wake timing across thermal extremes. Use Value: Delivers consistent response latency <15 ms across full temperature range-no recalibration needed after thermal soak testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT42QT2120-MAHR | 12-button QFN-24; no USB; 1.8–5.5 V; 2 µA standby; proprietary tuning only | Limited to small-keypad designs; lacks SmartSense_EMC and USB HID class support | Select when cost-sensitive, low-channel-count, non-USB applications require minimal firmware overhead. |
| STM32F072CBT6 | ARM Cortex-M0 MCU; 128 KB flash; 16 KB RAM; no dedicated CapSense hardware; requires software-based touch library | Requires significant firmware development for noise immunity; higher BOM cost due to external USB PHY | Select when existing STM32 toolchain is mandated and multi-function integration (e.g., motor control + touch) justifies added complexity. |
Compared with AT42QT2120-MAHR and STM32F072CBT6, CY8C20496A-24LQXI delivers production-ready CapSense performance with zero tuning effort, integrated USB HID, and proven EMC resilience-reducing qualification time by 40% in Class B industrial deployments.
Availability
CY8C20496A-24LQXI is available at Aetrix Electronics and suitable for industrial HMI panels, medical device keypads, consumer appliance controls, and automotive cabin interfaces requiring stable component supply and long-term lifecycle assurance.
Supply support for CY8C20496A-24LQXI 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
Cypress Semiconductor (now part of Infineon Technologies) is a fabless semiconductor company specializing in programmable system-on-chip solutions for embedded control, connectivity, and human interface applications.
The CY8C20xx6A family targets cost-sensitive, high-reliability capacitive touch applications-designed to replace mechanical switches and legacy touch controllers with single-chip, auto-tuned, USB-ready solutions for mass-market HMI designs.
FAQ
Does CY8C20496A-24LQXI require external crystal for USB operation?
No. The device uses its internal 24 MHz IMO for USB clock generation, which is trimmed to ±0.25% accuracy via factory calibration. An external 32 kHz crystal is optional and only required for high-precision sleep timing or when USB SOF synchronization demands tighter jitter control than the IMO provides.
Can SmartSense auto-tuning be disabled for custom sensor algorithms?
Yes. SmartSense can be disabled at runtime via PSoC Designer configuration or firmware API calls. The underlying CapSense hardware remains fully accessible, allowing developers to implement proprietary scanning sequences, baseline algorithms, or multi-frequency excitation schemes using the raw IDAC, comparator, and counter resources.
What is the maximum number of simultaneous touch points supported?
The device supports up to 33 independent capacitive sensors but does not implement true multi-touch gesture decoding in hardware. Firmware-level coordinate interpolation enables basic swipe/gesture recognition across slider arrays, but simultaneous multi-finger tracking (e.g., pinch-to-zoom) requires external processing or additional MCU resources.
Is the 32 KB flash memory partitioned between program code and CapSense configuration data?
No. Flash is unified and user-allocated. CapSense configuration-including sensor definitions, SmartSense parameters, and tuning coefficients-is stored in designated flash sectors alongside application firmware. PSoC Designer automatically manages sector allocation and supports over-the-air updates to both code and touch configuration independently.
CY8C20496A-24LQXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- CAPSENSE™ Controllers
- Package/Case:
- 32-UFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Capacitive Sensing
- Core Processor:
- M8C
- Program Memory Type:
- FLASH (16kB)
- Controller Series:
- CY8C20xx6A
- RAM Size:
- 2K x 8
- Interface:
- I2C, SPI, USB
- Number of I/O:
- 28
- Voltage - Supply:
- 1.71V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-QFN (5x5)
CY8C20496A-24LQXI FAQ
1.How can I place an order for CY8C20496A-24LQXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20496A-24LQXI 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 CY8C20496A-24LQXI reliable?
The price and inventory of CY8C20496A-24LQXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20496A-24LQXI is usually 5 days.
3.What payment methods are accepted for CY8C20496A-24LQXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20496A-24LQXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20496A-24LQXI?
CY8C20496A-24LQXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20496A-24LQXI 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 CY8C20496A-24LQXI?
For technical support, including CY8C20496A-24LQXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20496A-24LQXI requirements.
6.How does Aetrix verify that CY8C20496A-24LQXI is sourced from the original manufacturer or authorized distributors?
All CY8C20496A-24LQXI 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 CY8C20496A-24LQXI meets industry standards.
7.What is the process for return or replacement of CY8C20496A-24LQXI?
All CY8C20496A-24LQXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20496A-24LQXI, 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 CY8C20496A-24LQXI part is unused and in its original packaging.
Return procedure for CY8C20496A-24LQXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CY8C20496A-24LQXI Tags
-
CYPD3175-24LQXQ
Infineon Technologies
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SLB9672VU20FW1523XTMA1
Infineon Technologies
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SLB9670VQ20FW785XTMA1
Infineon Technologies
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SLB9672XU20FW1523XTMA1
Infineon Technologies
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SLB9673XU20FW2613XTMA1
Infineon Technologies
-
CYPD3125-40LQXIT
Infineon Technologies
-
AT97SC3204-U2A1A-20
Microchip Technology
-
AT97SC3204-U2A1A-10
Microchip Technology
-
SLM9670AQ20FW1311XTMA1
Infineon Technologies
-
SLB9672XU20FW1613XTMA1
Infineon Technologies
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SLB9672AU20FW1613XTMA1
Infineon Technologies
-
SLB9673AU20FW2613XTMA1
Infineon Technologies
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