IS31SE5117B: Ultra-Low Power, High Precision Touch Control from Lumissil Microsystems
- Tiffany Bacon
- Oct 21
- 2 min read
Updated: Oct 22
As smart interfaces continue to define the next generation of connected devices, designers are looking for solutions that balance power efficiency, reliability, and precision, especially in touch-based applications exposed to variable environments.
Introducing Lumissil Microsystems’ IS31SE5117B.
This ultra-low-power, 16-channel capacitive touch controller is engineered to deliver responsive, accurate touch detection while minimizing power consumption. It’s ideal for everything from home appliances to industrial control panels, providing robust performance in challenging real-world conditions.
Intelligent Design, Smarter Interaction
The IS31SE5117B features 16 independent capacitive touch channels, each with individually configurable thresholds and automatic calibration. This ensures that every touch is registered accurately, even as humidity, temperature, or surface conditions change.
Built-in hardware monitoring continuously adapts to environmental drift to prevent false triggers, a crucial advantage in applications where reliability and user trust are key.
To further improve system stability, the device includes a shield output that enhances moisture immunity, a common concern in appliances and industrial interfaces.
Built for Efficiency
One of the IS31SE5117B’s standout features is its extremely low power consumption.
In sleep mode, it draws less than 10µA, conserving energy in battery-powered or always-on designs.
The controller can auto-detect a touch to wake the system, providing instant response without constant polling.
With a 2.7V to 5.5V operating range and temperature tolerance from -40°C to +105°C, the IS31SE5117B is ready for deployment in rugged environments without sacrificing sensitivity or speed.
Seamless Integration
Communication between the IS31SE5117B and the host microcontroller is handled through a 400kHz I²C interface, enabling fast data exchange and flexible configuration. The device also supports interrupt-driven operation — an INT output can be programmed to trigger events whenever a touch is detected, allowing designers to optimize responsiveness without overburdening the system’s main processor.
For applications that demand more, the IS31SE5117B supports multiple-key detection and GPIO control functions, providing both versatility and scalability.
Applications
The IS31SE5117B is designed for a wide range of capacitive touch applications, including:
Touch keys for home appliances
Touch interfaces for industrial control systems
Smart lighting panels and control surfaces
Consumer electronics where low power and reliability are essential
Key Features
16-channel capacitive touch controller
Individual key threshold and calibration
Auto sleep mode (<10µA) with wakeup on touch
Shield output for improved moisture resistance
Built-in buzzer/melody generator
400kHz fast-mode I²C interface
Operating range: 2.7V – 5.5V, -40°C to +105°C
Compact QFN-24 package (ROHS & Halogen-Free compliant)
See It in Action
Watch a quick overview of Lumissil’s touch technology in action here:
And connect with Lumissil on LinkedIn for more innovations:
Partnered with TAARCOM
As Lumissil’s authorized sales representative, TAARCOM is proud to support engineers and OEMs across the Western U.S. in evaluating and designing with Lumissil’s full line of intelligent sensing, lighting, and connectivity solutions.
For design support, samples, or a product briefing, contact us today — let’s make your next interface smarter, faster, and more efficient.
Contact TAARCOM: info@taarcom.com
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