CY8C20140-SX21 - CapSense Express Touch Controller | Cypress
MPN： CY8C20140-SX21 ✗ 停產CY8C20140-SX21 概覽
A capacitive touch controller is a specialized semiconductor that detects changes in capacitance caused by a user's finger or conductive object. The CY8C20140-SX21 belongs to the CapSense Express family, a configurable touch-control and GPIO platform within the broader microcontroller and human-interface IC category. Compared with mechanical switches, capacitive sensing supports sealed panels, flexible control surfaces, LED feedback, and programmable button behavior without exposing moving contacts to dust, moisture, or wear.
The verified data identifies support for four to ten capacitive sensing buttons, one configurable 10-segment capacitive slider, and additional I/O resources for LEDs or interrupt outputs. Configuration is performed through an I2C interface, and operating parameters can be stored in onboard nonvolatile memory so that the controller can load its configuration automatically at power-on. This combination supports both development flexibility and production designs requiring deterministic startup behavior.
The CY8C20140-SX21 is particularly useful when a product needs a small number of touch inputs without using a general-purpose MCU. A slider can provide directional or level control, while remaining channels can serve as buttons or GPIOs. The verified sources identify the controller as a CapSense Express-10 device and describe configurable I/O behavior, but they do not provide a complete electrical limit table, recommended capacitor values, temperature range, or detailed timing characteristics.
Typical applications include appliance control panels, consumer-electronics keypads, compact industrial interfaces, and embedded products that combine capacitive buttons with LED indication. The controller can be placed beside a PCB-mounted or panel-mounted sensor electrode and connected to a host controller through I2C. Designers should verify the complete datasheet electrical characteristics, electrode configuration, power sequencing, and firmware configuration method before finalizing a new PCB.
This page distinguishes verified product facts from unavailable detailed parameters, links the original manufacturer and distributor references, and provides application guidance, comparison parameters, and replacement considerations for engineers evaluating the CY8C20140-SX21. Detailed values not present in the supplied sources are explicitly marked as unavailable rather than inferred.
直接替換替代品，適用於 CY8C20140-SX21 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： CY8C20140-SX21 （相同外形與佔位） — 差異在於 Configuration Storage, Product Type.
CY8C20140-SX2I
✅ 直接替換聯絡詢價
查看資料表 →CY8C20140-SX21
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →CY8C20110-SX21
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CY8C20120-SX21
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CY8C20130-SX21
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
CY8C20160-SX2I
✅ 直接替換📋 參考替代品（不在目錄中）
CY8C20140-SX21 最大額定值與電氣特性
| Product Type | CapSense Express-10 configurable I/O controller |
| Maximum Capacitive Sensing Buttons | 10 buttons |
| Capacitive Slider Configuration | 1 slider with 10 segments |
| Configurable I/O Channels | 10 channels |
| Configuration Interface | I2C |
| Configuration Storage | Onboard nonvolatile memory |
| Power-On Behavior | Automatic configuration loading |
| Additional I/O Functions | Buttons, GPIOs, LED driving, and interrupt signals |
| 封裝 | 16-SOIC |
| 安裝類型 | Surface Mount |
| Manufacturer | Cypress Semiconductor |
| Current Distributor Branding | Infineon |
CY8C20140-SX21 16-soic 腳位配置指南
CY8C20140-SX21（16-soic 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： CY8C20140-SX21.
請參閱 資料表 以查看完整腳位配置。
典型應用
CY8C20140-SX21 適用於 6 應用s: Appliance Control Panel, Consumer Electronics Keypad, LED Feedback Touch Interface, Capacitive Slider Control, Industrial HMI Module, Medical Device Touch Panel.
Appliance Control Panel
The CY8C20140-SX21 fits appliance panels that combine capacitive buttons with LED status indication. Its verified feature set supports up to 10 capacitive buttons or one 10-segment slider, while remaining configurable channels can operate as GPIOs for LEDs or interrupt signals. The controller can be mounted near the touch electrodes, reducing wiring compared with a network of mechanical switches. The I2C interface allows a host processor to configure sensing behavior and interpret events, while stored nonvolatile settings support automatic loading after power-on. Designers must still validate panel thickness, electrode spacing, humidity effects, grounding, and the controller's detailed electrical limits before production release.
推薦
Consumer Electronics Keypad
The CY8C20140-SX21 is suitable for compact consumer keypads where sealed capacitive controls provide a cleaner interface than mechanical switches. Up to 10 capacitive inputs can be assigned to buttons, and one 10-segment slider can support volume, brightness, or menu navigation. I2C configuration gives the product processor a simple control path, while onboard nonvolatile memory allows the interface definition to load automatically at startup. Because the verified excerpts do not provide sensitivity limits, acquisition timing, or recommended sensor-component values, a production implementation should calibrate against the actual enclosure, electrode artwork, and surface materials while checking the full manufacturer datasheet.
推薦
LED Feedback Touch Interface
The CY8C20140-SX21 can combine capacitive input and LED feedback because its configurable channels are documented for use as GPIOs that drive LEDs or generate interrupt signals. This allows touch feedback to be implemented close to the user interface without dedicating a separate GPIO-expansion device to every control. A host controller can configure the device through I2C and connect the touch events to the product state machine. The direct-drive current, LED duty-cycle limits, and logic thresholds are not included in the verified excerpts, so engineers should verify them in the datasheet and account for both LED and capacitive-sensing loading on the power rail.
推薦
Capacitive Slider Control
The CY8C20140-SX21 is appropriate for a one-axis, 10-segment slider used for level or directional input. The verified CY8C20140 family description specifically identifies support for one capacitive slider with 10 segments and configurable buttons or GPIOs for the remaining functions. A 10-segment interface can provide coarse position feedback while reducing the number of separate electrodes compared with a long linear array. Design validation should include finger-size coverage, electrode geometry, sensor spacing, slider resolution, and environmental drift. The supplied data does not state the controller's acquisition time or resolution, so those values must be obtained from the complete manufacturer documentation.
推薦
Industrial HMI Module
The CY8C20140-SX21 can serve as the touch-input front end in a compact industrial human-machine interface. Its configurable sensing resources can implement buttons or a slider, while I2C allows a supervisory controller to read states and update configuration. Nonvolatile configuration storage supports repeatable power-on behavior in equipment that must recover its interface state without a lengthy host setup sequence. Because industrial panels may use thick insulating materials, gloves, moisture, or conductive contamination, engineers should characterize the complete sensor structure rather than relying only on nominal laboratory touch performance. Datasheet electrical limits and environmental qualifications must also be confirmed for the final enclosure.
推薦
Medical Device Touch Panel
The CY8C20140-SX21 can support sealed touch controls in a medical-device enclosure where a mechanical switch interface is undesirable. Its verified support for capacitive buttons, a 10-segment slider, LED-driving GPIOs, and interrupt outputs is useful for a clean front panel with limited physical controls. The host processor can use I2C for configuration and event handling, while nonvolatile storage supports predictable startup behavior. Medical use requires broader validation than the supplied excerpts provide, including electrical isolation strategy, leakage limits, ESD performance, sterilization compatibility, and usability verification; no medical-specific qualification is stated in the verified data.
推薦
推薦產品摘要
工程參考資料，適用於 CY8C20140-SX21 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CY8C20140-SX2I | CY8C20140-SX21 | CY8C20110-SX21 | CY8C20120-SX21 | CY8C20130-SX21 | CY8C20160-SX2I |
|---|---|---|---|---|---|---|---|
| Brand | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon | Infineon |
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Product Category | CapSense Express-10 configurable I/O controller | CapSense Express controller | CapSense Express-10 configurable I/O controller | CapSense Express controller | CapSense Express controller | CapSense Express controller | CapSense Express controller |
主要差異化特點
- Dedicated 10-segment slider support (對比CY8C20160-SX2I)
- Direct configuration persistence (對比CY8C20110-SX21)
- Unified touch, LED, and interrupt resources (對比CY8C20120-SX21)
- Closest exact-family ordering candidate (對比CY8C20140-SX2I)
設計說明
Keep the CY8C20140-SX21 and its sensor-network components close to the touch electrodes, and route each electrode with a short, guarded trace. The verified excerpts do not provide recommended trace lengths or external component values, so use the complete datasheet as the controlling reference. Validate the final electrode geometry with the actual enclosure material and thickness; changing from a bare PCB to a plastic overlay can alter sensitivity, coupling, and the required compensation network.
Do not treat every CY8C201x0 family member as automatically interchangeable. The verified search results establish the target's configurable slider, GPIO, I2C, and nonvolatile-storage features, but they do not establish identical pin assignments for CY8C20110, CY8C20120, CY8C20130, or CY8C20160. Before approving a substitute, compare the 16-SOIC pin map, supply range, touch-channel allocation, slider architecture, I2C command set, memory behavior, and acquisition timing.
Power the controller and attached host from a rail that satisfies the datasheet's detailed operating and absolute-maximum limits. Those limits were not present in the supplied excerpts and are therefore not guessed here. Provide local decoupling according to the manufacturer guidance, keep switching-regulator and display-related noise away from sensitive electrode routing, and evaluate the rail during touch scanning. This is particularly important when the interface also drives LEDs or supports an industrial panel with longer external wiring.
Treat the I2C host connection as a potentially noise-sensitive control path even though the CY8C20140-SX21 itself is the sensing device. Use the voltage levels, pull-up arrangement, capacitance, and timing limits specified in the complete datasheet. Keep the bus away from antenna and switching-node copper where practical, and verify signal integrity when the controller is separated from the host by a long cable or placed on a different PCB section.
合規資訊
The supplied verified excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. The original manufacturer is Cypress Semiconductor; distributor listings currently display the part under Infineon.