Press Release

Capacitive Touch Panel Controller SSD2531

Enabling Multi-touch Applications with Highest Integration

(Hong Kong – 19 May, 2010) Solomon Systech today announced a new member SSD2531 to its Capacitive Touch Panel Controller Family. The new SSD2531 is an all-in-one Capacitive Touch Panel Controller that integrated power circuits, driving and sensing circuits into a single chip.  Succeed to the SSD2521 introduced a year earlier, the SSD2531 provides four additional sensing button pins allowing more flexible product designs such as Android-based devices. It also provides stronger noise immunity for both AC-VCOM and DC-VCOM TFT displays.  SSD2531 supports true multi-touch function for display panel up to 7″ WVGA resolution and has a DSP-based architecture that supports up to four fingers simultaneous detection. With a highly compact and competitive design, SSD2531 enables touch panel in portable devices such as mobile phones, personal navigation devices, digital still cameras and more. 

“We are expanding our product portfolio to cover different markets and applications of touch technology,” said Mr. W.M. Lo, Vice-President, Business Operations of Solomon Systech.  “Our product roadmap has planned for more new touch panel controllers of advanced features to support larger panel size and different touch technologies, and fulfill the growing market demand.”

Advantages of SSD2531

Strong ESD Protection

8kV ESD on IC level1

True Multi-touch

4 points absolute position
(Adaptive solution for mobile application)

Sophisticated Noise Control Algorithm

No shielding layer required

Strong Noise Immunity

To both AC-VCOM and DC-VCOM displays

Super High Touch Scanning Rate

Max. 200Hz

Adaptive Touch Detection Scheme

Mutual cap. sensing and faultless with water droplet

Low Power Standby Mode

Support touch key wake up for low power operation

Easy to Use

Built-in DSP for touch analysis and detection, no extra effort on firmware development

Excellent Cost-Performance Ratio

Ideal for consumer electronics market

8kV ESD protection on panel connection pins and 5kV on other pins


The SSD2531 samples are now available. Please contact our local sales office listed on the Solomon Systech website at or email us at for more information. 

About Capacitive Touch Panel and the Product Family

A user-friendly interface is always a successful factor of a handheld product design and the touch panel is probably a most welcome solution that provides substantial flexibility for a fancy interface design.  Generally, resistive touch panels are adopted in touch interface designs, but are increasingly changing to capacitive touch panels due to the benefits of better durability and higher optical clarity.

Besides these physical advantages, capacitive touch panels scale new heights in realizing multi-touch application, which has changed the perception of the touch panel interface.  With such distinctive features, the capacitive touch panel will become a mainstream touch technology and bring the market lots of innovative touch interface designs.

The capacitive touch panel controller family SSD2521/31from Solomon Systech provides touch interface solutions to fulfill the latest market needs.  These controllers integrate all the necessary components and functions such as power circuits, panel driving and sensing circuits, high resolution ADC, fast response digital signal processor (DSP) and finger tracking unit into single chips.  To support high accuracy and fast touch detection, the DSP adopts several arithmetic algorithms for finger extraction and tracking.  It tracks maximum four fingers simultaneously and reports the absolute coordinate of each finger.  In addition, it can detect individual touch incidents and events based on the tracked finger coordinates.  SSD2521/31 support true multi-touch and can drive up to 7” WVGA capacitive touch panel.  They are easy-to-use touch panel controllers with excellent cost performance.

SSD2531 is capable to detect maximum 4 fingers movement and enables user to operate the system more than a click.  With the Multi-Touch feature, many more fascinating functions can be created.

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