CY8C3866LTI-209 - 67MHz 8051 PSoC 3 MCU | Infineon
部品番号: CY8C3866LTI-209 ✓ 生産中CY8C3866LTI-209 概要
A PSoC, or programmable system-on-chip, combines a microcontroller core with configurable analog and digital peripherals on one semiconductor. In the broader hierarchy, the CY8C3866LTI-209 is an 8-bit microcontroller, embedded controller, and programmable system-on-chip rather than a general-purpose processor. Its 8051 instruction set and integrated peripherals reduce external component count in touch sensing, control, and mixed-signal embedded products.
The key features of the CY8C3866LTI-209 include a 67 MHz 8051 CPU, 64 KB Flash, 8 KB SRAM, a 20-bit ADC, and CAPSENSE. The combination of programmable analog and digital blocks allows designers to adapt peripheral behavior to a product rather than relying only on fixed hardware. Its operating-voltage options of 1.8 V, 2.5 V, 3.3 V, and 5 V support both low-voltage portable systems and conventional industrial control environments.
The part belongs to the CY8C38xx PSoC 3 family and combines CPU execution, flash program storage, SRAM, analog conversion, and capacitive sensing. Its 8-bit architecture is intended for compact control loops, user interfaces, sensor conditioning, and product differentiation through programmable peripherals. The 68-QFN package also supports dense PCB layouts, although its exposed thermal pad and fine-pitch routing require careful layout planning.
Typical applications include capacitive-touch control panels, industrial HMI terminals, home appliances, sensor interface modules, programmable instrumentation, and low-power embedded controllers. CAPSENSE is useful when a reliable user interface must operate through a panel, while the 20-bit ADC supports analog measurement and signal-conditioning tasks. The 8051 core is most appropriate where deterministic low-to-moderate processing demand matters more than high-performance application processing.
A primary design consideration is power and thermal planning. The exact operating current, flash endurance, ADC accuracy, GPIO configuration, and programming workflow should be checked against the manufacturer datasheet before final qualification. The exposed-pad package requires a properly designed thermal and ground plane, while firmware should be validated across voltage, temperature, and peripheral-loading conditions.
This product page consolidates the exact ordering information, core specifications, application guidance, package constraints, and sourcing workflow for CY8C3866LTI-209. It also identifies where design engineers should consult the official datasheet for complete pin assignments, register definitions, electrical limits, and programming information.
ドロップイン代替品: CY8C3866LTI-209 — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストCY8C3866LTI-209 最大定格＆電気的特性
| Product Type | PSoC 3 programmable system-on-chip microcontroller |
| CPU Architecture | 8-bit 8051 |
| Maximum CPU Frequency | 67 MHz |
| Program Memory | 64 KB Flash (64K x 8) |
| SRAM | 8 KB |
| ADC Resolution | 20-bit |
| CAPSENSE Support | Yes |
| Operating Voltage Options | 1.8 V, 2.5 V, 3.3 V, or 5 V |
| パッケージ | 68-QFN (8 mm x 8 mm) |
| Device Family | CY8C38xx PSoC 3 |
| 実装タイプ | Surface mount |
| RoHS ステータス | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
CY8C3866LTI-209 68-qfn (8 mm x 8 mm) ピン配置ガイド
CY8C3866LTI-209 (68-qfn (8 mm x 8 mm) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: CY8C3866LTI-209.
詳細は データシート をご参照ください。
主な用途
CY8C3866LTI-209 の用途: 6 件s: Capacitive Touch Control Panel, Industrial Sensor Interface, Home Appliance Control, Programmable HMI Controller, Precision Instrumentation Front End, Low-Power IoT Sensor Node.
Capacitive Touch Control Panel
The CY8C3866LTI-209 is suitable for a capacitive-touch control panel because its CAPSENSE resources are combined with an 8-bit 8051 CPU in one device. A controller can scan user-interface electrodes, interpret button or slider activity, update indicators, and manage communication tasks without requiring a separate touch-sensing IC. The 67 MHz CPU also provides useful headroom for filtering and debouncing, while the 64 KB Flash stores application firmware. The 68-QFN package helps preserve board area in compact products. Final sensor geometry, scan timing, grounding, and front-panel construction should follow the manufacturer’s CAPSENSE design guidance, while EMI behavior should be verified in the complete enclosure and power system.
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Industrial Sensor Interface
The CY8C3866LTI-209 can serve as the controller in an industrial sensor interface by combining an 8051 CPU, programmable analog and digital peripherals, and a 20-bit ADC. Engineers can use the conversion engine for analog measurement while the CPU handles conditioning, thresholds, diagnostics, and data reporting. Support for 1.8 V, 2.5 V, 3.3 V, and 5 V permits the device to fit several power domains. The 64 KB Flash and 8 KB SRAM support compact firmware with local buffering. For production equipment, validate ADC accuracy, input impedance, channel multiplexing, noise, temperature behavior, and isolation or protection requirements under the exact industrial operating conditions.
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Home Appliance Control
In a home appliance, the CY8C3866LTI-209 can consolidate touch controls, analog monitoring, and discrete machine-control functions. Its 8051 CPU executes motor, valve, lamp, and safety-state logic, while CAPSENSE can provide a sealed capacitive interface and the 20-bit ADC can monitor analog feedback. Programmable peripherals also help reduce the number of discrete input and output devices. The 8 mm by 8 mm 68-QFN package supports compact controller boards, while operating from 3.3 V or 5 V can simplify power planning. Designers should account for motor and relay transients, provide appropriate protection, and validate brownout behavior, restart sequencing, and isolation across the appliance’s full mains-related environment.
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Programmable HMI Controller
The CY8C3866LTI-209 is appropriate for a programmable human-machine interface controller that must combine local user input, analog status, and communications. CAPSENSE can support touch buttons or a slider behind a panel, while the 20-bit ADC can monitor potentiometers, dividers, or analog status channels. The 67 MHz 8051 CPU can handle scanning, display updates, and protocol tasks in a single firmware environment. Its 64 KB Flash and 8 KB SRAM are useful for compact embedded interfaces, and the 68-QFN footprint minimizes board area. For production designs, test display timing, debounce behavior, ESD resilience, standby-current targets, startup sequence, and communication traffic under worst-case operator activity.
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Precision Instrumentation Front End
The CY8C3866LTI-209 can act as the control and measurement engine in compact instrumentation when the design benefits from a programmable mixed-signal MCU. Its 20-bit ADC provides a high-resolution conversion resource, while the CPU can perform calibration, averaging, filtering, range conversion, and status reporting. The programmable digital blocks can support timers, serial interfaces, and deterministic control tasks without relying on a larger processor. The 64 KB Flash accommodates configuration data and firmware, and the compact QFN package suits instrument front panels. The exact ADC accuracy, reference requirements, noise performance, and acquisition timing must be validated from the manufacturer datasheet before defining measurement uncertainty or calibration limits.
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Low-Power IoT Sensor Node
The CY8C3866LTI-209 fits low-power IoT sensor nodes that need local sensing, programmable control, and compact package size. The ADC can acquire sensor data, CAPSENSE can create local controls without exposed mechanical switches, and the 8051 CPU can package readings before transmission. Multiple voltage options allow system-level power optimization, while the 64 KB Flash and 8 KB SRAM support protocol and buffering tasks. The PSoC architecture can reduce external component count in small wearable, smart-home, or industrial sensing products. The design must nevertheless verify sleep currents, wake sources, analog settling, sensor biasing, radio coexistence, and firmware update behavior because those operating details are not established by the basic product-page specifications.
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おすすめ製品の概要
エンジニアリング参考データ: CY8C3866LTI-209 — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
設計ノート
Use the exact 68-QFN land pattern and exposed-pad recommendations from the CY8C3866LTI-209 manufacturer package drawing. Place the device so its exposed pad connects to the intended thermal and ground structure, and add thermal vias where the package guidance calls for them. Preserve assembly access around the fine-pitch perimeter and maintain the manufacturer’s solder-mask and paste-land recommendations to avoid bridging or insufficient solder.
Separate sensitive analog and CAPSENSE routes from switching nodes, high-current return paths, and inductors. Follow the manufacturer’s bypass-capacitor placement guidance and connect each local supply capacitor directly to its intended power and ground pins with minimal loop area. Because the device supports several voltage options, confirm that the internal core, I/O, and analog rails are configured consistently with the external supply design before firmware configuration.
Do not treat similar CY8C38xx or PSoC devices as automatic replacements. Check the exact pin description, exposed-pad function, operating-voltage range, Flash and SRAM capacity, ADC architecture, CAPSENSE resources, clock limits, and active programming state before substitution. Also distinguish CY8C3866LTI-209 from CY8C3866LTI-209T; the suffix can represent a different orderable configuration rather than an interchangeable production marking.
コンプライアンス情報
The manufacturer product page and distributor summaries do not provide extractable RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is treated as not applicable because this part is not identified as an automotive-qualified ordering option.