On July 10, 2025, Shanghai, China - SITWEI (Shanghai) Electronic Technology Co., Ltd. (stock abbreviation: SITWEI, stock code: 688213) recently announced the launch of the Automotive Sensor (AT) Series 3MP automotive grade image sensor performance upgrade new product - SC326AT. As the first CMOS image sensor in the SITWEI car series products to achieve full process localization, SC326AT is built on SITWEI CarSens XR process technology and adopts a 3.0 μ m single pixel and back illuminated architecture design. It has achieved significant optimization in core performance such as sensitivity, noise suppression, high-temperature imaging stability, and power control, and supports high dynamic range mode up to 120dB and on-chip ISP function, meeting the upgrade needs of car surround view cameras with clear, accurate, and reliable imaging effects. In addition, SC326AT meets the requirements of ISO 26262 ASIL-B automotive functional safety and ISO 21434 automotive network security standards, and with high reliability and security, it helps to upgrade and transform intelligent automotive applications.

Ultra high sensitivity and dynamic range, both low light and backlight are high-definition

The new SC326AT is based on the CarSens XR process technology from STMicroelectronics, with a large pixel size of 3.0 μ m. It has significant advantages in sensitivity, signal-to-noise ratio, dynamic range, and other performance aspects. It can effectively reduce the interference of various complex lighting environments such as low light, backlight, and strong light on the imaging quality of image sensors, providing clear and accurate image information of the surrounding areas of vehicles for intelligent car perception system applications such as 360 ° panoramic imaging.

High sensitivity and high signal-to-noise ratio

SC326AT achieves better sensitivity and signal-to-noise ratio while ensuring high-level color performance through single pixel architecture, BSI structure, and material optimization. The peak quantum efficiency (QE) of SC326AT in the visible light band at 520nm is as high as 85%, which can bring brighter and clearer images to surround view cameras even in low light environments such as underground parking lots with insufficient lighting.

High Dynamic Range (HDR)

SC326AT supports PixGain HDR+VS three frame HDR mode, which can achieve a dynamic range of up to 120dB. It can help car cameras capture more details of bright and dark parts of the image, effectively reducing the occurrence of overexposure of bright parts and missing details of dark parts under extreme lighting conditions such as strong light and backlight, thereby improving the accuracy of car imaging system detection and recognition。

Excellent noise suppression performance, stable high-temperature imaging

SC326AT is based on the advanced CarSens XR process technology, SFCPixel technology, and optimized design of the readout circuit architecture from STMicroelectronics, achieving performance improvements in noise suppression and high-temperature imaging stability. In maximum gain mode, the fixed noise (FPN) of SC326AT is significantly reduced by about 52% compared to its predecessor, allowing the car camera to capture clearer and cleaner images in low light environments. At the same time, the SC326AT reduces the dark current (DC), DSNU, and white pixel by about 47%, 74%, and 14%, respectively, in a high-temperature environment of 105 ℃. It can provide stable and reliable real-time image information for car cameras when facing long-term high-temperature operating environments.

Thanks to Siwei's advanced CarSens XR process technology, the SC326AT image sensor with BSI architecture has achieved excellent low-power performance. In PixGain HDR+VS three frame HDR mode YUV format, the typical power consumption of SC326AT is as low as 350mW or less. Ultra low power consumption performance can help reduce the overall heat generation of the car camera, thereby improving the stability and reliability of the car camera.

On chip Sensor+ISP 2-in-1, further enhancing the quality of surround view images

SC326AT supports on-chip ISP functionality, and its built-in self-developed ISP algorithm covers the entire ISP pipeline of RAW, RGB, and YUV domains, including AGC, AEC, AWB, HDR synthesis, noise reduction, and other functions. It optimizes image clarity, noise, color, and other dimensions to meet the high-quality image requirements of vehicle surround view camera applications.

In addition, SC326AT supports iBGA packaging and is compatible with the previous generation product Pin2Pin, ensuring that customers can seamlessly replace existing hardware designs and accelerate the iterative upgrade of in car surround view camera applications.

Shi Wenjie, Vice President of Product Marketing at SITWEI, said, "SC326AT is the first CMOS image sensor in SITWEI's automotive series to achieve full process localization. Compared to its predecessor, the SC326AT with a 3.0 μ m single pixel backlit architecture has achieved further improvements in core performance such as sensitivity, noise suppression, and high-temperature imaging stability, providing clear, accurate, and reliable real-time images for in car surround view camera applications. As a 3MP in vehicle application image sensor, SC326AT has achieved full process localization from design, manufacturing to mass production. With high performance and cost advantages, it has become another high-quality choice for the in vehicle CIS product supply system, which will effectively enhance the resilience and competitiveness of Sitwei in the automotive industry supply chain. At present, the in car (AT) series under SITWEI has a rich product specification covering 1MP~8MP resolution, which can meet the needs of ADAS, perception, and cabin applications. In the future, SITWEI will continue to expand its AT series product matrix, continuously develop more automotive grade image sensor products with different specifications, high performance, and high reliability, and help the automotive industry upgrade to intelligence. ”

SC326AT has currently accepted samples and will achieve mass production in Q4 2025. To learn more about the SC326AT product, please contact the sales personnel of SITWEI.

About SmartSens Technology

SmartSens Technology (stock abbreviation: SmartSens, stock code: 688213) is a high-tech enterprise engaged in the research and development, design, and sales of CMOS image sensor chip products. Its headquarters is located in Shanghai, China, and it has research and development centers in multiple cities and countries.

Since its establishment, SITWEI has always focused on innovation and research and development of high-end imaging technology, and has gained recognition and favor from many customers with its performance advantages. As a CMOS image sensor product company committed to providing multi scenario applications and full performance coverage, our company's products have covered the full performance requirements of multi scenario application fields such as security monitoring, machine vision, intelligent vehicle electronics, and smartphones.

SITWEI will uphold the vision of "using cutting-edge intelligent imaging technology to enable people to better see and understand the world", with customer needs as the core driving force, continuously promote the upgrading of cutting-edge imaging technology, expand product application areas, and work with partners to promote the deepening development of future intelligent imaging technology.

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