CY8C20134-12SXI - 8-Bit 12MHz CapSense PSoC 1 MCU | Cypress
Référence : CY8C20134-12SXI ✓ ActifCY8C20134-12SXI Présentation
A microcontroller is the central embedded control element of a product: it executes firmware, reads sensors, drives outputs, and manages power sequencing. The PSoC (Programmable System-on-Chip) family extends that role by integrating configurable analog and digital peripherals - counters, timers, comparators, serial interfaces, and capacitive sensing - onto the same die as the CPU. In the product hierarchy, CY8C20134-12SXI sits at MCU -> 8-bit microcontroller -> mixed-signal PSoC -> capacitive sensing controller -> power management and sensing subsystem.
Key differentiators include the dedicated CAPSENSE capacitive sensing array (CSA), which supports buttons, sliders, touchpads and proximity sensors with configurable sense elements, plus on-chip flash for in-circuit firmware storage, an internal oscillator, and a low pin count that keeps the footprint to 8 leads. These features let a designer replace a discrete button, metal pad, or proximity target with a glass or plastic user interface while keeping the BOM and PCB area small.
Technically the device combines an 8-bit M8C core with 8 KB flash and 512 bytes of SRAM, and its I/O pins are multiplexed with the CapSense block so that sensing channels can be traded against general-purpose pins. Because the CSA operates with the same silicon as the digital logic, the sensing front end avoids the discrete bridge or resistive ladder networks used in older touch designs. Programming is handled through the PSoC Creator tool chain, and the same family covers capacitive sensing, general mixed-signal control, and low-cost user interface tasks.
Typical applications include capacitive control panels for kitchen and home appliances, proximity-activated backlights in automotive interiors, touch-sensing remote controls, low-cost sensor conditioning nodes, and small appliance motor or dimming control boards. The 8-SOIC outline makes it directly usable in through-hole industrial control boards where a larger QFN package would be impractical.
When designing around this device, plan the CapSense PCB layer with clean, well-defined sensor pads, keep the CSA sensor traces short and away from switching nodes, and confirm that the firmware's tuning parameters match the physical electrode geometry. Note also that the 8-pin footprint limits the number of independent CapSense electrodes, so applications needing more channels should be routed to a larger member of the CY8C20xxx family.
This page consolidates manufacturer ordering information, memory and package specifications, drop-in alternatives, comparison parameters and practical design guidance into one engineering reference so you can qualify the part quickly.
Alternatives de remplacement direct pour CY8C20134-12SXI — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec CY8C20134-12SXI (même facteur de forme et même empreinte) — différant par Maximum Clock Frequency, Package, Series.
CY8C24123A-24SXI
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CY8C20142-12SXI
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
CY8C20134-12SXIT
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
ATTINY85V-10SH
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATTINY85V-10SUR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ATMEGA808-AU
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →CY8C20134-12SXI Valeurs maximales et caractéristiques électriques
| Product Type | CAPSENSE CSA PSoC 1 mixed-signal microcontroller |
| CPU Core | M8C 8-bit |
| Fréquence d'horloge maximale | 12 MHz |
| Flash Program Memory | 8 KB (8K x 8) |
| SRAM | 0.5 KB (512 x 8 bytes) |
| Number of I/O | 6 |
| Tension d'alimentation | 4.75 V (operating) |
| Oscillator Type | Internal |
| Capacitive Sensing | CAPSENSE CSA (buttons, sliders, touchpads, proximity) |
| Boîtier | 8-SOIC (0.154 in, 3.90 mm width) |
| Nombre de broches | 8 |
| Type de montage | Surface Mount |
| Shipping Package | Tube |
| Series | PSoC 1 CY8C20xxx |
| Programmable System-on-Chip | Yes (PSoC) |
Configuration des broches de CY8C20134-12SXI
| Broche 1 | P1[3] — Port 1 GPIO / CapSense channel (multiplexed) |
| Broche 2 | P1[2] — Port 1 GPIO / CapSense channel (multiplexed) |
| Broche 3 | P0[3] — Port 0 GPIO / CapSense channel (multiplexed) |
| Broche 4 | GND — Ground reference for supply and CapSense |
| Broche 5 | P0[2] — Port 0 GPIO / CapSense channel (multiplexed) |
| Broche 6 | P0[1] — Port 0 GPIO / CapSense channel (multiplexed) |
| Broche 7 | P0[0] — Port 0 GPIO / CapSense channel (multiplexed) |
| Broche 8 | VDD — Positive supply input, 4.75 V operating |
Applications typiques
CY8C20134-12SXI convient pour 6 applications: Capacitive Control Panels for Home Appliances, Automotive Interior Proximity and Backlight Control, Low-Cost Sensor Conditioning and Signal Conditioning Nodes, Capacitive Remote Controls and Consumer Accessories, Small Appliance Motor, Dimming and Relay Control, Industrial Sensor Hubs and Compact Control Boards.
Capacitive Control Panels for Home Appliances
The CY8C20134-12SXI suits capacitive control panels for ovens, washing machines and coffee makers because the CAPSENSE CSA block handles buttons, sliders and touchpads on the same die as the 12 MHz M8C CPU. Six I/O pins are enough to drive indicator LEDs and a relay or solenoid driver alongside the touch electrodes, while 8 KB of flash stores the touch tuning table and appliance state machine. Compared with a discrete resistor ladder, the integrated CSA removes component count and gives automatic baseline compensation. The trade-off is pin count: designs needing more than roughly three touch electrodes plus control outputs should move to a larger CY8C20xxx member.
Recommandé
Automotive Interior Proximity and Backlight Control
Proximity-activated map lights, seat occupancy trim and touch-sensitive console surfaces are typical uses for the CY8C20134-12SXI, whose CAPSENSE CSA block supports proximity sensors behind plastic trim. The internal oscillator avoids a crystal and its load capacitors, which saves board space in tight console modules, and the 8-SOIC outline fits a through-hole or mixed-technology control board. Eight kilobytes of flash is adequate for debounce and adaptive-threshold algorithms, and 512 bytes of RAM covers sensor-state variables. For any deployment requiring AEC-Q100 qualification, check the automotive-grade ordering option; that qualification is not stated for this catalogue number, and the operating temperature range must also be confirmed from the manufacturer datasheet.
Recommandé
Low-Cost Sensor Conditioning and Signal Conditioning Nodes
In sensor conditioning nodes - smart probes, small motor controllers and analog front-end monitors - the CY8C20134-12SXI acts as the supervisory controller, running acquisition timing and filtering firmware on the 12 MHz M8C core. The PSoC architecture lets the same silicon provide configurable counters, comparators and timers alongside the CPU, so a thermistor or pressure element can be read without a separate timer IC, and 8 KB of flash accommodates calibration tables. The 512-byte SRAM limits buffering depth, so designs that need waveform history should store samples externally rather than in RAM.
Recommandé
Capacitive Remote Controls and Consumer Accessories
Handheld remotes, wireless key fobs and small consumer accessories benefit from the CY8C20134-12SXI because capacitive buttons can be placed under a sealed plastic shell, eliminating mechanical contacts that wear out. The CSA block also supports proximity wake-up, allowing a device to sleep until a hand approaches, which extends battery life versus a mechanically latched switch. With only 6 I/O pins, the design should map LED indication onto the same pins as the sensor electrodes where the firmware supports time-multiplexing. Eight kilobytes of flash is generous for a button-map and low-power state machine, and the tube packaging suits manual assembly of low-volume accessories.
Recommandé
Small Appliance Motor, Dimming and Relay Control
The CY8C20134-12SXI is a workable controller for small appliance output stages - fan speed trim, lamp dimming, pump sequencing - because the configurable PSoC peripherals can generate accurate PWM and drive a relay or MOSFET gate without a dedicated timer chip. The 12 MHz core provides adequate resolution for closed-loop fan control, and 8 KB of flash holds speed tables and ramp profiles. Because the six I/O pins must now be shared between sensing and drive functions, prioritize pin multiplexing in firmware rather than adding another package, and use the exposed pin description table in the manufacturer datasheet to avoid contention between CapSense channels and PWM outputs.
Recommandé
Industrial Sensor Hubs and Compact Control Boards
Compact industrial controllers for pump stations, valve nodes and equipment interfaces often need a touch-enabled front panel plus a small MCU, and the 8-pin CY8C20134-12SXI covers both in one device. The CAPSENSE CSA block provides local button or level sensing without any external sensing network, while the 8 KB flash and 512-byte RAM run the supervisory loop, watchdog and communication service routine. The internal oscillator and SOIC-8 outline allow the module to be built on a mixed-technology board with through-hole connectors, which is common in equipment cabinets. Confirm the operating temperature range and supply limits from the manufacturer datasheet before using the device outside consumer-temperature environments.
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Récapitulatif des produits recommandés
Données de référence d'ingénierie pour CY8C20134-12SXI — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | CY8C24123A-24SXI | CY8C20142-12SXI | CY8C20134-12SXIT | ATTINY85V-10SH | ATTINY85V-10SUR |
|---|---|---|---|---|---|---|
| Package | 8-SOIC (0.154 in, 3.90 mm width) | 8-SOIC - same outline | 8-SOIC - same outline | 8-SOIC - same outline | 8-SOIC - same outline | 8-SOIC - same outline |
| Brand | Cypress Semiconductor (Infineon Technologies) | Cypress Semiconductor (Infineon Technologies) | Cypress Semiconductor (Infineon Technologies) | Cypress Semiconductor (Infineon Technologies) | Microchip Technology | Microchip Technology |
| CPU Core | M8C 8-bit | M8C 8-bit | M8C 8-bit | M8C 8-bit | AVR 8-bit | AVR 8-bit |
| Maximum Clock Frequency | 12 MHz | 24 MHz (+100%) | 12 MHz (same) | 12 MHz (same) | 8 MHz (-33%) | 8 MHz (-33%) |
| Flash Program Memory | 8 KB (8K x 8) | 4 KB (-50%) | 8 KB (same) | 8 KB (same) | 8 KB (same) | 8 KB (same) |
| Number of I/O | 6 | 6 | 6 | 6 | 6 | 6 |
| Capacitive Sensing (CAPSENSE CSA) | Yes - buttons, sliders, touchpads, proximity | Yes | Yes, larger channel count | Yes (same) | No | No |
| Oscillator Type | Internal | Internal | Internal | Internal (same) | Internal RC | Internal RC |
| Shipping Package | Tube | Tube | Tube | Tape & Reel | Tube | Tape & Reel |
Principaux différenciateurs
- Integrated CAPSENSE CSA removes the external sensing network (vs ATTINY85V-10SUR)
- Twice the core clock of the 8 MHz AVR alternatives (vs ATTINY85V-10SH)
- Double the flash of the 24 MHz family sibling (vs CY8C24123A-24SXI)
- Programmable analog and digital peripherals on the same die (vs ATMEGA808-AU)
Notes de conception
Lay out the CapSense electrodes as large, well-defined copper areas on a dedicated sensor layer or on the top copper away from ground pours, and route each sense trace as a short, narrow trace with a surrounding ground guard. Keep switching nodes, relay contacts, motor traces and DC-DC converters at least several millimetres from the electrode and sense trace region to prevent coupled noise from modulating the CSA baseline. Shielding and guard rings on the ground pour reduce humidity-driven baseline drift in sealed plastic enclosures.
Assign pins deliberately because the six I/O pins are shared between general-purpose use and CapSense channels. Map the electrodes to the pins listed in the manufacturer pin description table, keep a dedicated pin for the supply and ground reference, and avoid driving a CapSense pin as a PWM or logic output in the same firmware state as an active sense scan. Where a capacitive channel and a fast-switching output must share the board, separate them physically rather than relying on firmware timing.
Estimated: with a 5 V rail at the VDD pin, place a 0.1 uF ceramic bypass capacitor as close as possible to the supply pin and a 1 uF to 10 uF bulk capacitor on the rail; the exact recommended values should be taken from the manufacturer datasheet decoupling section. Because the device uses an internal oscillator and the CapSense block senses in the millivolt range, supply ripple and ground bounce translate directly into touch accuracy, so keep the ground return of the sensor pins short and free of high-current return paths.
Do not substitute a generic 8-bit MCU of similar speed without redesigning the sensing front end - the CAPSENSE CSA block is the core function of this device. Also avoid assuming that the 512-byte SRAM can hold sample buffers or long data logs; it is sized for a modest working set only. Finally, verify the operating temperature range and any automotive qualification requirement from the manufacturer datasheet before releasing the design into a harsh or safety-relevant environment.
Informations de conformité
No compliance statement is published in the manufacturer ordering information for this part; RoHS, REACH, lead-free and halogen-free status must be confirmed on the manufacturer product page or in the declaration-of-conformity documentation before release to a regulated market.
