GT9110 - 10-Point Capacitive Touch Controller IC | Goodix
MPN: GT9110 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.84 | $920.00 |
| 1,000 | $1.62 | $1,620.00 |
| 3,000 | $1.38 | $4,140.00 |
GT9110 Overview
A capacitive touch controller is a semiconductor device that senses the change in capacitance caused by a finger or stylus contacting a projected-capacitive (PCAP) touch panel and translates those measurements into multi-point coordinates. The GT9110 sits within the broader hierarchy: capacitive touch controller -> touch sensing IC -> human-machine interface (HMI) controller -> mixed-signal semiconductor. Unlike resistive touch controllers, capacitive controllers such as the GT9110 support true multi-touch and gesture recognition without requiring mechanical pressure on the panel.
Key features include support for up to 10 concurrent touch points with real-time accurate coordinate, motion trajectory, and touch area reporting. The GT9110 reports touch information selectively based on the host controller's requested number of points, optimizing I2C bus bandwidth. The device supports projected-capacitive G+G and G+F+F panel structures and is qualified for transmittance >=85% with appropriate cover-lens stacks. The internal signal processing provides adaptive frequency hopping to suppress noise from displays and chargers.
Architecturally, the GT9110 combines an analog front-end with a programmable digital processor that runs Goodix's proprietary touch-detection algorithms. The device supports auto-calibration at power-on and continuous environmental compensation during operation, eliminating the need for host-side recalibration. The host interface is configurable I2C with selectable device address, enabling two chips on the same bus for larger panel designs.
Typical applications include Android and Windows tablets, industrial human-machine interface (HMI) panels, 2-in-1 convertible notebooks, smart-home control panels, and automotive rear-seat entertainment displays. It is widely adopted in 7-10.4 inch G+G capacitive touch panels from major LCD module vendors. A representative reference design is the DWIN TPC104T0008G01V1 10.4-inch capacitive touch panel with transmittance >=85%.
When designing with the GT9110, observe the I2C pull-up resistor values (2.2 kohm to 4.7 kohm depending on bus capacitance), keep the I2C traces short and shielded from noise sources, and follow Goodix's PCB layout guidelines for the sensor pattern routing. The reset and interrupt lines should be pulled correctly per the datasheet to avoid initialization failures.
This page synthesizes distributor pricing, same-brand Goodix family variants, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for GT9110 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
GT9110P
✅ Drop-In📋 Reference alternative (not in catalog)
GT9110H
✅ Drop-In📋 Reference alternative (not in catalog)
GT911
✅ Drop-In📋 Reference alternative (not in catalog)
GT9271
✅ Drop-In📋 Reference alternative (not in catalog)
GT912
✅ Drop-In📋 Reference alternative (not in catalog)
GT9110 Specifications
| Function | 10-point projected-capacitive touch sensor controller |
| Touch Points | Up to 10 simultaneous |
| Transmitter Electrodes | Up to 42 |
| Receiver Electrodes | Up to 30 |
| Host Interface | I2C (configurable address) |
| Recommended Panel Size | 7 inch to 10.4 inch |
| Panel Structure Supported | G+G, G+F+F (PCAP) |
| Min Panel Transmittance | >=85% |
| Package | QFN |
| Mounting Type | Surface Mount |
| Auto Calibration | Yes (power-on and continuous) |
| Noise Suppression | Adaptive frequency hopping |
| RoHS Status | Compliant (per distributor listings) |
GT9110 qfn Pin Configuration Guide
Pin configuration for GT9110 (qfn package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for GT9110.
Refer to the datasheet for full pin configuration.
Typical Applications
GT9110 is suitable for 7 applications: Android and Windows Tablet Touch Panels, Industrial Human-Machine Interface (HMI) Panels, Smart Home Control Panels, Educational Tablets and E-Readers, Portable Medical Touch Devices, 2-in-1 Convertible Notebook Touchscreens, Automotive Rear-Seat Entertainment Displays.
Android and Windows Tablet Touch Panels
The GT9110's 10-point multi-touch capability and 42 Tx / 30 Rx electrode architecture make it ideal for Android and Windows tablets in the 7-10.4 inch size class. According to Goodix datasheet, it supports G+G and G+F+F panel structures with transmittance >=85%, ensuring the optical clarity required for high-resolution tablet displays. The I2C interface integrates directly with mainstream tablet application processors from MediaTek, Unisoc, Rockchip, and Allwinner, while the adaptive frequency hopping suppresses charger and LCD noise common in tablet designs. Placed under the cover glass with ITO sensor routing per the Goodix reference layout, it delivers gesture-class responsiveness with low host CPU load, making it a de-facto choice for entry- to mid-range tablets.
Recommended
Industrial Human-Machine Interface (HMI) Panels
The GT9110's 42 Tx / 30 Rx electrode budget and I2C host interface suit industrial HMI panels from 7 to 10.4 inches, including factory automation touchscreens and process-control HMIs. According to Goodix documentation, the auto-calibration at power-on and continuous environmental compensation eliminate the manual recalibration that plagues resistive touch in industrial environments. The I2C interface connects to industrial MCUs such as NXP i.MX RT and STMicroelectronics STM32, while the G+G panel structure tolerates harsh industrial cleaning chemicals. Compared to discrete touch AFE designs, the integrated GT9110 reduces BOM cost and PCB area, while the adaptive frequency hopping maintains reliable touch under high electromagnetic noise from motors and switching power supplies.
Recommended
Smart Home Control Panels
The GT9110 is widely deployed in wall-mounted smart-home control panels for HVAC, lighting, and security interfaces, where the 10-point multi-touch supports gesture controls such as pinch-to-zoom on floor plans and swipe-to-dismiss on notification lists. According to Goodix datasheet, the G+G panel structure with transmittance >=85% preserves the display brightness essential for always-on wall panels. The I2C interface connects to Wi-Fi SoCs from Realtek and MediaTek, while the QFN package supports slim-bezel industrial designs. The continuous environmental compensation adapts to long-term temperature and humidity drift in residential installations, and the integrated processor offloads touch detection from the host, freeing the application CPU for graphics and connectivity tasks.
Recommended
Educational Tablets and E-Readers
The GT9110 is a popular choice for educational tablets and large e-readers in the 8-10 inch class, where 10-point multi-touch enables collaborative learning features such as shared drawing surfaces and multi-user games. According to Goodix documentation, the adaptive frequency hopping rejects LCD and charger noise common in battery-powered educational devices, and the auto-calibration at startup eliminates factory touch-tuning steps. The I2C interface simplifies connection to low-cost application processors from Allwinner and Rockchip, while the QFN package supports the slim industrial designs required for student-use hardware. Power consumption is competitive with other capacitive controllers in this class, making it suitable for all-day classroom battery life.
Recommended
Portable Medical Touch Devices
The GT9110 supports portable medical devices such as handheld diagnostic terminals, bedside patient monitors, and portable ultrasound systems, where reliable multi-touch input is critical for clinician workflows. According to Goodix documentation, the G+G panel structure tolerates medical-grade disinfectants, and the adaptive noise suppression maintains touch accuracy near switching power supplies and RF emitters common in medical equipment. The I2C interface integrates with medical-grade MCUs and SoCs while the QFN package supports the slim industrial designs required for portable carts. Designers must perform additional system-level qualification per IEC 60601-1 when using the standard GT9110; Goodix does not list an AEC-Q100-qualified variant, so automotive and life-supporting medical use cases require custom qualification.
Recommended
2-in-1 Convertible Notebook Touchscreens
The GT9110 supports 10-12 inch convertible notebook touchscreens where 10-point multi-touch enables both finger touch and active stylus input for productivity applications. According to Goodix documentation, the 42 Tx / 30 Rx electrode architecture provides sufficient resolution for handwriting recognition and fine-grained gesture control, while the adaptive frequency hopping suppresses the LCD backlight and power-supply noise characteristic of compact notebook designs. The I2C interface integrates with Intel and AMD platform controllers, and the QFN package supports the slim-bezel industrial designs demanded in the premium notebook segment. Compared to discrete touch AFE solutions, the GT9110's integrated processor reduces host CPU load during high-frequency stylus sampling.
Recommended
Automotive Rear-Seat Entertainment Displays
The GT9110 is deployed in aftermarket and select OEM rear-seat entertainment displays in the 7-10 inch class, where passenger-facing multi-touch supports interactive entertainment menus. According to Goodix documentation, the G+G panel structure with transmittance >=85% preserves the visual quality of rear-seat LCD panels, while the adaptive frequency hopping maintains touch accuracy near automotive infotainment switching supplies. The I2C interface connects to automotive-qualified application processors through level shifters. The standard GT9110 is not AEC-Q100 qualified; for production automotive designs, additional system-level qualification per ISO 16750 is required, or designers should contact Goodix directly for newer AEC-Q100-qualified touch controllers.
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Recommended Products Summary
Engineering reference data for GT9110 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | GT9110P | GT9110H | GT911 | GT9271 | GT912 |
|---|---|---|---|---|---|---|
| Package | QFN | QFN - same | QFN - same | QFN - same | QFN - same | QFN - same |
| Brand | Goodix | Goodix - same | Goodix - same | Goodix - same | Goodix - same | Goodix - same |
| Transmitter Electrodes | Up to 42 | 42 | Up to 32 | Up to 32 | Up to 56 | Up to 24 |
| Receiver Electrodes | Up to 30 | 30 | Up to 20 | Up to 22 | Up to 40 | Up to 16 |
| Recommended Panel Size | 7" to 10.4" | Tablet-class (similar) | Smaller panels (~5"-8") | Small/medium panels | 8" to 15.6" | Small panels |
| Host Interface | I2C | I2C | I2C | I2C | I2C | I2C |
| Auto Calibration | Yes | Yes | Yes | Yes | Yes | Yes |
| Panel Transmittance Min | >=85% | >=85% | >=85% | >=80% | >=85% | >=80% |
Key Differentiators
- Higher electrode count in same QFN package (vs GT911)
- Targeted for larger tablets (vs GT912)
- Pin-compatible firmware family migration (vs GT9271)
Design Notes
The GT9110 requires correct power-on reset timing: hold RESET low for at least 10 ms after VDD reaches 90% of nominal, then wait an additional 55 ms before issuing I2C commands. According to the Goodix datasheet, failing this sequence results in the controller failing to respond to address 0x5D or 0x14. Always include a 100 nF decoupling capacitor within 3 mm of the VDD pin, plus a 4.7 uF bulk capacitor on the same net.
Route the I2C SDA and SCL traces as a differential pair with matched length, keeping them at least 3 mm away from switching power inductors and the LCD timing-controller signals. According to the Goodix reference layout guide, use 2.2 kohm pull-ups for bus capacitance under 100 pF (typical for short host-SoC traces), and 4.7 kohm for longer bus runs. Keep the INT and RESET traces short and away from the touch sensor ITO routing.
The GT9110 uses adaptive frequency hopping to reject LCD VCOM noise and charger interference, but this requires the touch sensor ITO traces to maintain consistent impedance with a ground reference within 100 microns. According to the Goodix datasheet, sensor traces longer than 10 cm benefit from a guard ring tied to GND with 0.5 mm spacing to suppress external capacitive coupling. Validate touch accuracy across full battery temperature (-20C to +60C).
Estimated: in a typical 7-inch tablet design with the QFN package on a 2-layer FR4 board, the GT9110 dissipates approximately 90 mW in active operation (3.0 V x 30 mA). With a package theta_JA of approximately 60 C/W on a 2-layer board, this results in a junction temperature rise of only 5.4 C above ambient, well within the operating range. No additional thermal management is required for typical designs.
Compliance Information
RoHS compliance and lead-free status are indicated by distributor listings. AEC-Q100 not qualified - standard GT9110 is for consumer/industrial use. Reach, halogen-free, and conflict-minerals status not stated in provided data.
