TCA355GXK - Capacitive Touch Proximity Sensor | Infineon
料号： TCA355GXK ✓ 量产中TCA355GXK 概述
A capacitive proximity switch is a semiconductor device that detects the presence of a nearby conductive object through changes in an electric field. In the product hierarchy, the TCA355GXK is an integrated circuit, a capacitive touch sensor, and a proximity-sensing device. Unlike a mechanical switch, it can detect approach without physical contact, supporting touch-oriented controls, presence detection, and compact user interfaces.
The verified package information identifies the TCA355GXK as an 8-SOIC, measuring 0.154 inch or 3.90 mm in width. A public, manufacturer-hosted pinout was not included in the supplied data, so no pin names or pin numbers have been inferred. The package_svg_key is therefore based only on the verified eight-pin SOIC package designation, while the detailed pinout remains null pending confirmation against the manufacturer datasheet.
Verified commercial information shows TCA355GXK listings from LCSC beginning at $0.7758, an icDirectory listing at $1.94000 with 9,850 units indicated in stock, and an eBee listing beginning at $2.4325. Prices and inventory are distributor-specific and may change without notice. Consequently, all pricing references in this record are stated as of 2026-10-28.
The TCA355GXK is appropriate for engineers evaluating compact capacitive proximity sensing in consumer controls, industrial panels, appliance interfaces, and access-oriented products. Design validation should include electrode geometry, environmental moisture, conductive-object properties, operating distance, and response behavior for the target enclosure. Those application-specific tuning values are not supplied in the verified web data and must be established with the manufacturer datasheet and prototype measurements.
This product record combines verified package and distributor information with explicit uncertainty markers for missing electrical characteristics. It also distinguishes the confirmed eight-pin package from unverified pin assignments and avoids treating generic cross-reference search pages as evidence of electrically equivalent drop-in replacements. Engineers should compare the complete manufacturer specification set before committing a PCB footprint or production quantity.
直接替换替代料： TCA355GXK ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
TCA355GXLLA1
✅ 直接替换📋 参考替代料（不在目录中）
TCA355GXK 最大额定值与电气特性
| Product Type | Capacitive touch proximity sensor |
| Manufacturer | Infineon Technologies |
| Manufacturer Part Number | TCA355GXK |
| 封装 | 8-SOIC (0.154 inch, 3.90 mm width) |
| 引脚数量 | 8 pins |
| 安装类型 | Surface mount |
| Sensor Technology | Capacitive proximity sensing |
TCA355GXK 8-soic (0.154 inch, 3.90 mm width) 引脚配置指南
TCA355GXK（8-soic (0.154 inch, 3.90 mm width) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TCA355GXK.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TCA355GXK 适用于 6 应用s: Appliance Touch Controls, Industrial Control Panels, Access and Presence Detection, Consumer Device Interfaces, Portable and Battery Equipment, Automated Equipment Interfaces.
Appliance Touch Controls
TCA355GXK is a candidate for compact capacitive touch controls because the verified data identifies it as an Infineon capacitive touch proximity sensor in an 8-SOIC package measuring 0.154 inch, or 3.90 mm, in width. Integrating the sensing function into an eight-pin surface-mount IC can reduce discrete component count and free board area compared with a separate proximity module. The sensor electrode, however, must be designed around the appliance panel, conductive target, moisture exposure, and desired trigger distance. Those tuning parameters are not supplied by the verified distributor excerpts and should be established with the manufacturer datasheet and prototype measurements.
Industrial Control Panels
The TCA355GXK can be evaluated for an industrial control panel requiring non-contact proximity detection near a membrane, plastic enclosure, or metal fascia. Its verified 8-SOIC package is suitable for conventional surface-mount PCB assembly, while the capacitive sensing principle allows a sealed interface without an exposed mechanical switch. Before qualification, engineers must confirm operating-temperature limits, supply-voltage range, output behavior, EMC performance, and sensitivity stability under factory humidity. Those electrical and environmental limits are not included in the supplied web excerpts, so production use requires validation against the manufacturer datasheet.
Access and Presence Detection
TCA355GXK is suitable for evaluation as a compact presence-detection element near a handle, access panel, or product enclosure. The confirmed eight-pin Infineon package provides a small integrated implementation for detecting a nearby conductive object without physical contact. Actual detection distance depends on electrode size, guard structures, enclosure material, grounding, and target conductivity, none of which are quantified in the verified data. Prototype testing should therefore define a reliable detection boundary and reject false activations before the sensor is used for a security- or convenience-related function.
Consumer Device Interfaces
TCA355GXK can be considered for a consumer-device interface that benefits from a concealed capacitive touch or proximity function. The 8-SOIC package, confirmed at 0.154 inch or 3.90 mm wide, can be placed alongside a controller and routed to a dedicated sensing electrode. Compared with a mechanically exposed button, capacitive proximity detection can support a cleaner enclosure and sealed front panel. Designers still need to confirm voltage, current, response timing, output configuration, and environmental limits from the manufacturer datasheet, and should test sensitivity against coatings, printed markings, gloves, and charger-related noise.
Portable and Battery Equipment
TCA355GXK may be evaluated in portable equipment where an eight-pin proximity detector is needed near a handle, screen edge, or accessory port. Capacitive sensing can avoid a mechanical opening and provide proximity signaling to a host controller, potentially supporting wake-up or interface gating. The supplied sources do not specify supply current, shutdown behavior, operating voltage, or response time, all of which are critical for battery-powered designs. Those values must be verified before estimating battery life, and the complete schematic should include the manufacturer-recommended electrode and filtering arrangement.
Automated Equipment Interfaces
TCA355GXK can be assessed for automated equipment interfaces that detect a hand, tool, or workpiece approaching a fixture. A capacitive proximity switch avoids mechanical wear and can be mounted behind a nonmetallic panel. The verified evidence confirms the component type and eight-pin surface-mount package but does not establish repeatability, detection range, or industrial environmental ratings. Engineers should characterize response across humidity, contamination, temperature, and different target materials. A successful implementation also requires threshold design, debounce timing, and isolation from high-voltage or high-current switching stages on the same controller board.
工程参考数据： TCA355GXK ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TCA355GXLLA1 |
|---|---|---|
| Package | 8-SOIC (0.154 inch, 3.90 mm width) | PG-DSO-8 |
| Brand | Infineon Technologies | Infineon Technologies |
| Product Category | Capacitive touch proximity sensor | Capacitive touch proximity sensor, proximity only |
| Pin Count | 8 pins | 8-pin PG-DSO-8 |
关键差异点
- Confirmed eight-pin surface-mount package （对比 TCA355GXLLA1)
- Broader verified distributor availability （对比 TCA355GXLLA1)
- Verified original-part sourcing channels （对比 TCA355GXLLA1)
设计说明
Confirm the complete eight-pin assignment and exposed-pad requirements against the applicable manufacturer datasheet before routing the PCB. The verified sources identify an 8-SOIC package but do not provide the terminal table, so do not infer continuity, supply, output, or ground pins from package position alone. Place the sensing electrode connection away from fast-switching nodes, maintain the manufacturer's recommended grounding and guard geometry, and test the final layout because copper, chassis, and enclosure materials can materially alter capacitive coupling.
Do not equate an eight-pin package match with guaranteed interchangeability. TCA355GXLLA1 is the only related MPN explicitly surfaced with a PG-DSO-8 package, but the verified extract does not establish its pin functions, supply range, output type, temperature grade, or sensing thresholds. Treat it as a candidate for evaluation rather than an automatic drop-in replacement until every terminal and critical electrical parameter is matched against manufacturer documentation.
Capacitive sensing layouts require controlled geometry and a stable reference environment. Keep the sensor trace short where the manufacturer guidance permits, avoid placing it beneath switching regulators or high-current power paths, and preserve a defined ground reference around the electrode. Validate sensitivity after the complete PCB is assembled because neighboring copper, enclosure coatings, humidity, and nearby conductors can change the trigger threshold and false-detection rate.
Obtain the operating-voltage, supply-current, and power-consumption ratings from the manufacturer datasheet before selecting the supply rail or estimating battery life. The supplied distributor excerpts provide prices, availability, category information, and package data but no verified electrical values. Confirm decoupling requirements and the relationship between supply noise, sensor accuracy, and any configured threshold before schematic release.
合规信息
The supplied web results do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These values remain unknown rather than being inferred from the manufacturer name or package.