CY8C20140-SX2I - 4-Key CapSense Controller | Infineon
料号： CY8C20140-SX2I ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
CY8C20140-SX2I 概述
A capacitive-touch controller is a semiconductor that detects changes in capacitance caused by a user touching an external conductive pad. In the broader hierarchy, the CY8C20140 belongs to capacitive sensing controllers, interface ICs, and embedded control devices. Its sensing algorithm is designed for high sensitivity and low noise, with claimed immunity to RF and AC noise and low radiated EMC noise. This makes it useful where physical buttons must remain reliable on sealed, compact, or cosmetic control surfaces.
The device supports applications with four, six, eight, or ten capacitive inputs according to the verified product description, although the selected CY8C20140 listing is specifically categorized as a 16-SOIC part. Firmware and configuration are handled through an I2C interface, and configuration can be stored in onboard nonvolatile memory for automatic loading at power-on. The available data identifies 2 kbits of density and 2 KB of flash storage; these values are retained exactly as provided rather than inferred into unsupported detail.
The controller is suitable for appliance control panels, access controls, audio equipment, industrial interfaces, and consumer products. A four-button panel can use the configurable I/O for sensing electrodes or auxiliary functions, while the host processor reads status and handles higher-level behavior. Designers should confirm the exact pin functions, electrical limits, configuration procedure, and application circuit from the manufacturer datasheet before layout or firmware release.
PCB implementation requires careful sensor-electrode geometry, grounding, shielding, and separation from noisy switching nodes. The available verified excerpts emphasize broad support for sensor capacitance, sensor shapes, sensor sizes, and noise immunity, but do not provide enough data to state precise layout dimensions or timing values. Use the manufacturer guidance for those details rather than extrapolating from generic touch-controller layouts.
This page consolidates distributor availability, manufacturer-oriented search results, indexed datasheet excerpts, and replacement research for CY8C20140-SX2I. The supplied evidence does not include a current unit price, complete pinout, or verified list of same-package substitutes; those gaps are explicitly marked instead of being filled with guesses.
CY8C20140-SX2I 规格参数
| Product Type | CapSense Express capacitive-touch button controller |
| Configurable I/O Count | 4 configurable I/Os |
| Supported Capacitive Button Inputs | 10/8/6/4 capacitive button inputs |
| 电源电压 | 3 V |
| Memory Density | 2 kbits |
| Number of Words | 2 k |
| Bits per Word | 1 bit |
| Flash Memory | 2 KB |
| RAM | 512 bytes |
| 工作温度 | -40 °C to +85 °C |
| 封装 | 16-SOIC |
| Package Type | SOIC-16 |
| 安装方式 | Surface mount |
| 接口 | I2C |
| Sensing Features | Robust sensing algorithm; high sensitivity; low noise |
| Noise Immunity | Immunity to RF and AC noise |
| Radiated Noise | Low radiated EMC noise |
| Configuration Storage | Onboard nonvolatile memory with automatic power-on loading |
CY8C20140-SX2I soic-16 引脚配置指南
CY8C20140-SX2I（soic-16 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： CY8C20140-SX2I.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CY8C20140-SX2I 适用于 6 应用s: Appliance Control Panel, Audio Equipment Front Panel, Industrial Equipment Interface, Access Control Keypad, Consumer Touch Interface, LED Status and Button Panel.
Appliance Control Panel
The CY8C20140-SX2I fits appliance fascias that need sealed capacitive buttons rather than exposed mechanical switches. Its four configurable I/Os can support the verified four-button use case, while the I2C interface allows a host processor to configure behavior and read button status. The claimed RF and AC noise immunity is useful when the panel is mounted near relays, display converters, or motor-control circuitry, although the actual performance depends on electrode geometry, grounding, and shielding. Use the manufacturer layout guidance and validate the complete panel in its final enclosure.
推荐
Audio Equipment Front Panel
A capacitive front panel can use CY8C20140-SX2I to detect volume, source, and playback commands while preserving a clean cosmetic surface. The controller’s low radiated EMC noise claim is relevant around audio and power circuitry because it helps limit controller-generated emissions, but the verified data does not quantify audio-band performance. The I2C configuration path also allows product firmware to store panel behavior in nonvolatile memory for automatic loading after power-on.
推荐
Industrial Equipment Interface
The CY8C20140-SX2I is a candidate for industrial control surfaces where users operate equipment through sealed capacitive keys. The verified -40 °C to +85 °C operating range and claimed resistance to RF and AC noise make it more relevant to industrial evaluation than a purely consumer touch switch. Nevertheless, the supplied data does not provide quantified EMC margins, isolation ratings, or hazardous-location approvals, so the controller should be used only after system-level testing and confirmation of applicable compliance requirements.
推荐
Access Control Keypad
The CY8C20140-SX2I can serve as the sensing element for a compact access-control keypad when the host system handles authentication and locking. Four configurable I/Os and support for selectable capacitive input counts provide flexibility for button electrodes, while the I2C interface keeps the sensing controller separate from the security decision logic. The verified material does not specify security certification or communication encryption, so it should not be treated as a standalone security device; pair it with an appropriately protected host system.
推荐
Consumer Touch Interface
CY8C20140-SX2I is suitable for compact consumer products that need a small number of capacitive controls without a large application processor. Its configurable I/Os can be assigned to sensing buttons or GPIO functions such as LED indication or interrupt signaling, depending on the configuration mode. The 16-SOIC package helps keep the design compact, but the complete pinout and electrical limits are not present in the supplied data; engineers should verify routing, decoupling, and exposed sensor-pin requirements in the manufacturer documentation.
推荐
LED Status and Button Panel
The verified device description specifically notes that configurable I/Os can drive LEDs or interrupts as well as operate as capacitive inputs. This makes CY8C20140-SX2I useful for a panel that combines touch keys with local status indication or an interrupt line to a host controller. The assignment of each function must be checked against the device’s electrical limits and configuration table, which are not included in the supplied excerpts. Keep LED current paths separated from sensitive sensor routing and confirm the final load on every GPIO.
推荐
推荐产品汇总
工程参考数据： CY8C20140-SX2I ——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 |
|---|---|
| Package | 16-SOIC |
| Brand | Infineon Technologies |
| Product Type | CapSense Express capacitive-touch controller |
| Configurable I/O | 4 |
| Capacitive Input Modes | 10/8/6/4 capacitive button inputs |
| Supply Voltage | 3 V |
| Memory Density | 2 kbits |
| Flash Memory | 2 KB |
| RAM | 512 bytes |
| Interface | I2C |
| Operating Temperature | -40 °C to +85 °C |
关键差异点
- Combines capacitive sensing and configurable GPIO functions （对比 CY8C20160-SX2I)
- Supports four to ten capacitive button inputs （对比 Generic fixed-channel touch controller)
- I2C-configurable with nonvolatile power-on loading （对比 Non-programmable touch switch)
设计说明
Treat the sensor electrodes as controlled-signal nodes rather than ordinary digital inputs. Keep sensor traces short where practical, maintain the recommended clearance from switching power and high-current paths, and use a continuous ground reference beneath or around the panel as directed by the manufacturer. The verified excerpts emphasize support for different sensor shapes and sizes, but they do not provide exact trace dimensions, so do not invent them from a generic CapSense layout.
Place the controller, sensor-routing components, and grounding structure so that coupling from display converters, relays, mains-derived circuits, and motor electronics is minimized. Because the verified data claims RF and AC noise immunity without providing quantified test limits, reproduce that claim only after testing the assembled panel. A shield or guard structure may help, but the correct implementation depends on the electrode geometry and the manufacturer reference layout.
Do not select CY8C20140-SX2I solely from the four-I/O description without checking the active configuration mode, sensor count, I2C electrical requirements, and package pinout. The supplied search results contain conflicting indexed descriptions, including an 8-pin reference, while the distributor records identify the target as 16-SOIC. Resolve that discrepancy against the current manufacturer datasheet before releasing a footprint or writing firmware.
合规信息
The supplied verified search results do not provide explicit current compliance declarations for this MPN. RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status are therefore recorded as unknown.