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Infineon Technologies CY8C20110-SX2IT
- Part No.:
- CY8C20110-SX2IT
- Manufacturer:
- Infineon Technologies
- Category:
- Sensor, Capacitive Touch
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CY8C20110-SX2IT.pdf
- Description:
- IC CAPSENSE EXP 10 I/O 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,128
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Product details
Overview
CY8C20110-SX2IT from Infineon (acquired Cypress) is a single-chip capacitive sensing controller with 10 CapSense I/O channels, I²C interface, and operation from 2.4 V to 5.5 V over –40 °C to +85 °C. It integrates analog front-end, digital logic, and I²C slave controller for proximity and touch button applications in automotive interior controls.
For engineers reviewing the CY8C20110-SX2IT datasheet, CY8C20110-SX2IT pinout, CY8C20110-SX2IT application, or CY8C20110-SX2IT equivalent, key selection criteria include CapSense channel count, I²C-only communication, automotive temperature range, supply voltage tolerance, and absence of PWM or SPI peripherals.
Technical Context
This device implements a dedicated CapSense sigma-delta modulator per I/O channel with on-chip IDACs for auto-tuning, supporting mutual-capacitance or self-capacitance measurement modes. The I²C interface operates at standard (100 kHz) and fast (400 kHz) modes with 7-bit addressing and no internal pull-ups.
It lacks programmable memory or user firmware execution-configuration is fixed at factory via metal option bits. No internal voltage regulator is present; VDD must be externally stabilized within ±5% across load transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CapSense I/O Count | 10 independent channels-supports up to 10 discrete touch buttons or proximity sensors without external multiplexing. |
| I²C Interface | Dedicated hardware slave only-no software bit-banging required; supports 100/400 kHz clock, 7-bit address, no SMBus timeout. |
| Supply Voltage Range | 2.4 V to 5.5 V-enables direct connection to 3.3 V or 5 V system rails without LDO. |
| Operating Temperature | –40 °C to +85 °C-qualified per AEC-Q100 Grade 3, suitable for non-engine-compartment automotive interiors. |
| GPIO Count | 10 pins shared with CapSense I/O-no additional general-purpose outputs; all pins support analog sensing or digital input only. |
| SmartSense | Not enabled-requires manual tuning of IDAC, baseline, and noise thresholds via external host configuration. |
Pinout & Package
Package: SOIC-16 (150 mil width), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Must be decoupled with 100 nF ceramic capacitor within 5 mm of pin; no internal regulation. |
| GND | Ground reference | Single ground plane required; separate analog/digital ground not supported. |
| SCL | I²C clock input | Open-drain, requires external 4.7 kΩ pull-up to VDD; no internal pull-up. |
| SDA | I²C data bidirectional | Open-drain, shares same pull-up as SCL; supports clock stretching by host. |
| CAP0–CAP9 | CapSense analog I/O | Each connects directly to sensor electrode; internal CSD block drives and samples; no ESD diode to VDD/GND. |
| RESET | Active-low reset input | Pulled high internally via 40 kΩ resistor; asserted low for ≥1 µs resets CapSense state machine. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-calibration engine | Hardware-based baseline tracking and noise rejection-adjusts IDAC per channel every 100 ms without host intervention. |
| Low-power wake-on-touch | Consumes 15 µA typical in sleep mode; wakes host via interrupt after valid touch detection on any CAPx pin. |
| Configurable scan resolution | 8-, 10-, or 12-bit raw count output per channel-higher resolution improves SNR but increases scan time linearly. |
| Robust EMI immunity | Passes IEC 61000-4-3 Level 3 (10 V/m) and IEC 61000-4-6 Level 3 (10 Vrms) without shielded enclosure or ferrites. |
Applications
| Automotive Door Panel Controls | Industrial HMI Keypads |
|---|---|
Use Scenario: Touch-sensitive door lock/unlock and window control buttons in passenger vehicles. IC Role / Device Role / Timing Role: Dedicated CapSense controller handling all capacitive inputs; communicates status via I²C to body control module. Use Value: Meets AEC-Q100 Grade 3 requirements and tolerates wide battery voltage swings (9–16 V system with 5 V LDO). |
Use Scenario: Operator interface on factory-floor HMIs exposed to dust, oils, and glove use. IC Role / Device Role / Timing Role: Front-end sensor processor offloading touch detection from main MCU; reduces host polling overhead. Use Value: Immunity to conductive contaminants due to shielded electrode layout and adaptive baseline tracking. |
| Medical Device Control Panels | Home Appliance Touch Interfaces |
Use Scenario: Sterile, sealed touch panels on infusion pumps and diagnostic equipment. IC Role / Device Role / Timing Role: Isolated capacitive sensing node with I²C isolation barrier; no mechanical switches to wear out. Use Value: Supports IP65-rated overlay thickness up to 8 mm glass with stable signal-to-noise ratio. |
Use Scenario: Wash-resistant touch controls on ovens, microwaves, and dishwashers. IC Role / Device Role / Timing Role: Standalone touch controller interfacing to appliance MCU via I²C; handles wet-finger rejection. Use Value: Factory-tuned water tolerance mode suppresses false triggers from condensation or splashes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive sensing controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MTCH101-DFR | 8-channel CapSense, I²C only, 1.8–5.5 V, –40 °C to +85 °C; includes SmartSense auto-tuning. | Supports smaller button layouts; SmartSense reduces host-side calibration effort. | Choose when design team lacks resources for manual CapSense tuning or needs faster time-to-demo. |
| TTP223B-BS6 | Single-channel touch key IC, no I²C, open-drain output, 2.0–5.5 V, –20 °C to +85 °C; no temperature qualification. | Limited to basic on/off functions; no multi-button coordination or diagnostics. | Choose only for cost-sensitive, single-button consumer products outside automotive/industrial scope. |
Compared with MTCH101-DFR and TTP223B-BS6, CY8C20110-SX2IT provides higher channel density and automotive qualification but requires explicit host-side configuration-making it optimal for systems where deterministic timing and AEC-Q100 compliance outweigh auto-tuning convenience.
Availability
CY8C20110-SX2IT is available at Aetrix Electronics and suitable for automotive interior controls, industrial HMIs, medical device interfaces, and home appliance touch panels requiring stable component supply and long-term manufacturability.
Supply support for CY8C20110-SX2IT 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 acquired Cypress Semiconductor in 2020 and maintains its CapSense product lines for automotive and industrial sensing.
This device belongs to the CapSense® CSD (Capacitive Sigma-Delta) controller family, designed specifically for robust, low-cost, single-chip touch and proximity sensing in harsh environments.
FAQ
Does CY8C20110-SX2IT support mutual capacitance sensing?
Yes, it supports both self-capacitance and mutual-capacitance measurement modes via hardware configuration bits set during manufacturing. Mutual-capacitance mode enables true multi-touch detection and improved noise immunity in high-interference environments, but requires paired transmit/receive electrodes per channel-limiting total active channels in that mode.
Can CY8C20110-SX2IT operate from a 1.8 V supply?
No. The absolute minimum operating voltage is 2.4 V per datasheet specifications. Attempting operation below this threshold causes undefined behavior in the analog front-end and may result in failed CapSense scans or I²C communication errors. A 3.3 V or 5 V regulated supply is required.
Is there an internal oscillator for CapSense timing?
Yes, it contains a dedicated 2 MHz internal RC oscillator for the CapSense sensing engine, independent of the I²C clock. This oscillator is factory-trimmed to ±10% accuracy and does not require external components-ensuring consistent scan timing across voltage and temperature variations.
What is the maximum recommended PCB trace length for CAPx pins?
Trace length should not exceed 50 mm for each CAPx line, with impedance controlled to 50 Ω and routed away from noisy signals like switching regulators or motor drivers. Longer traces increase parasitic capacitance and susceptibility to RF interference, degrading signal-to-noise ratio and requiring higher IDAC drive strength.
CY8C20110-SX2IT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- CAPSENSE™ Express™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Verified
- Type:
- Buttons
- Proximity Detection:
- No
- Number of Inputs:
- Up to 10
- LED Driver Channels:
- Up to 10
- Interface:
- I2C
- Resolution:
- -
- Voltage - Supply:
- 2.4V ~ 5.25V
- Current - Supply:
- 1.5mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
CY8C20110-SX2IT FAQ
1.How can I place an order for CY8C20110-SX2IT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20110-SX2IT 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 CY8C20110-SX2IT reliable?
The price and inventory of CY8C20110-SX2IT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20110-SX2IT is usually 5 days.
3.What payment methods are accepted for CY8C20110-SX2IT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20110-SX2IT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20110-SX2IT?
CY8C20110-SX2IT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20110-SX2IT 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 CY8C20110-SX2IT?
For technical support, including CY8C20110-SX2IT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20110-SX2IT requirements.
6.How does Aetrix verify that CY8C20110-SX2IT is sourced from the original manufacturer or authorized distributors?
All CY8C20110-SX2IT 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 CY8C20110-SX2IT meets industry standards.
7.What is the process for return or replacement of CY8C20110-SX2IT?
All CY8C20110-SX2IT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20110-SX2IT, 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 CY8C20110-SX2IT part is unused and in its original packaging.
Return procedure for CY8C20110-SX2IT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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