CY8C20140-SX2I - 4-Key CapSense Controller | Infineon
MPN: CY8C20140-SX2I ✓ NakahandaCY8C20140-SX2I Ulas
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.
Mga alternatibo na pwedeng ilagay na CY8C20140-SX2I — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok CY8C20140-SX2I (parehas na form factor at footprint) — pagkakaiba sa Configuration Storage, Product Type.
Wala ng magagamit na drop-in alternatibo para sa produkto na ito.
Hilingin ang AlternatiboCY8C20140-SX2I Mga Spesipikasyon
| 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 |
| Volte ng Pagbibigay | 3 V |
| Memory Density | 2 kbits |
| Number of Words | 2 k |
| Bits per Word | 1 bit |
| Flash Memory | 2 KB |
| RAM | 512 bytes |
| Temperature na Operasyon | -40 °C to +85 °C |
| Packhaging | 16-SOIC |
| Package Type | SOIC-16 |
| Style ng Pagpapasok | Surface mount |
| Interface | 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 |
Gabay sa Pin Configuration ng CY8C20140-SX2I soic-16
Pin configuration para sa CY8C20140-SX2I (soic-16 package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa CY8C20140-SX2I.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
CY8C20140-SX2I ay nararapat para sa 6 aplikasyons: 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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
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.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for CY8C20140-SX2I — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto |
|---|---|
| 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 |
Pangunahing mga Pagkakaiba
- Combines capacitive sensing and configurable GPIO functions (kumpara saCY8C20160-SX2I)
- Supports four to ten capacitive button inputs (kumpara saGeneric fixed-channel touch controller)
- I2C-configurable with nonvolatile power-on loading (kumpara saNon-programmable touch switch)
Talaan ng Disenyo
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.
Impormasyon ng Pagsunod sa Kautusan
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.