STMPE321 STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STMPE321 is a capacitive touchscreen controller from STMicroelectronics with I2C interface. Supports up to 10-point multi-touch detection in a compact 12-pin QFN package. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 12
- Lifecycle
- ACTIVE
- Datasheet
- N/A
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of STMPE321?
- 10-point multi-touch capacitive sensing via I2C serial interface
- Ultra-compact 12-pin QFN package enabling space-efficient PCB designs
- Integrated gesture recognition and touch coordinate reporting
What is STMPE321 used for?
The STMPE321 is ideal for consumer electronics requiring touch interfaces, including smartphones, tablets, and portable media players. It suits industrial HMI panels and wearable devices needing reliable multi-touch input in constrained form factors. The I2C interface simplifies integration with low-power microcontrollers in battery-powered applications.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
What are equivalent replacements for STMPE321?
Compatible alternatives and drop-in replacements for STMPE321:
Frequently Asked Questions
How many simultaneous touch points can STMPE321 detect and at what interface speed?
The STMPE321 supports up to 10 simultaneous touch points via its I2C interface, which operates at up to 400 kHz in fast mode. This makes it suitable for complex multi-gesture interactions without requiring high-bandwidth communication lines in your design.
Which package does STMPE321 use and what are its physical dimensions?
The STMPE321 comes in a 12-pin QFN package measuring approximately 3 mm x 3 mm, enabling compact PCB layouts. This small footprint is advantageous for wearables and portable devices where board space is limited to less than 10 mm² per component.
In what temperature range can STMPE321 operate reliably in industrial environments?
The STMPE321 is rated for operation across a -40°C to +85°C temperature range, making it suitable for industrial HMI panels and ruggedized portable equipment. This wide thermal tolerance ensures consistent capacitive touch performance in harsh or outdoor environments over extended deployments.
What supply voltage does STMPE321 require and how does that affect system design?
STMPE321 operates from a 1.8 V to 3.6 V supply, making it compatible with modern low-voltage microcontrollers and SoCs directly without level shifters. This supply range supports battery-powered designs where minimizing power rail count is critical for BOM cost and PCB complexity reduction.
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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
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
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