STMPE811 STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
The STMicroelectronics STMPE811 is a resistive touchscreen controller with 8-bit I2C/SPI interface and integrated 8-channel GPIO expander in a compact 16-pin QFN package. It supports 4-wire resistive touch panels and includes an on-chip ADC. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 17
- Lifecycle
- ACTIVE
- Datasheet
- STMPE811 Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STMPE811?
- Integrated 4-wire resistive touchscreen controller with on-chip 12-bit ADC for accurate touch coordinate detection
- 8-channel GPIO expander with interrupt output, doubling as a versatile I/O port when touch function is unused
- Dual I2C and SPI serial interface support with configurable I2C address for flexible system integration
- Ultra-compact 16-pin QFN package (4x4mm) minimizing PCB footprint in portable and handheld display designs
What is STMPE811 used for?
The STMPE811 is designed for embedded systems incorporating small to medium resistive touchscreen displays, such as handheld industrial terminals, point-of-sale devices, and embedded HMI panels. Its combined touch controller and GPIO expander function allows system designers to reduce component count by replacing a discrete touchscreen controller and a separate I/O expander with a single chip. The I2C interface enables straightforward connection to microcontrollers and application processors running Linux or RTOS-based display stacks.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the STMPE811 datasheet?
STMPE811 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for STMPE811?
Compatible alternatives and drop-in replacements for STMPE811:
Frequently Asked Questions
What type of touchscreen does the STMPE811 support?
The STMPE811 supports 4-wire resistive touchscreen panels. It includes an integrated 12-bit ADC that digitizes touch X, Y coordinates and Z-axis pressure measurements. The controller handles all analog front-end functions including panel excitation and measurement sequencing, delivering digital touch data to the host via I2C or SPI.
What serial interfaces does the STMPE811 support and what is the I2C address?
The STMPE811 supports both I2C (up to 400kHz Fast mode) and SPI serial interfaces. The I2C address is configurable via an address select pin, providing two possible 7-bit addresses (0x41 or 0x44) to allow up to two devices on the same I2C bus. The SPI interface supports modes 0 and 3 for broad microcontroller compatibility.
What is the GPIO expander capability of the STMPE811?
In addition to touchscreen control, the STMPE811 integrates 8 configurable GPIO pins that can function as digital inputs or outputs. Each GPIO pin supports interrupt generation. This GPIO expander capability is useful for driving LEDs, reading buttons, or controlling peripheral devices, reducing the total chip count in compact embedded display systems.
What package is the STMPE811 available in and what are its dimensions?
The STMPE811 is housed in a 16-pin QFN (Quad Flat No-Lead) package measuring 4x4mm with a 0.5mm pitch. The exposed thermal pad on the bottom provides good thermal dissipation. The small package footprint makes it well suited for space-constrained designs in tablets, portable medical devices, and handheld consumer electronics.
Is the STMPE811 supported by Linux kernel drivers?
Yes, the STMPE811 has an upstream Linux kernel driver (stmpe) that supports both the touchscreen and GPIO functions. The driver is included in mainline Linux and supports common platforms such as ARM Cortex-A application processors. This makes integration into embedded Linux systems (using device tree configuration) straightforward without requiring custom driver development.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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