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Infineon Technologies CY8C20534-12PVXI
- Part No.:
- CY8C20534-12PVXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
CY8C20534-12PVXI.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,079
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Product details
Overview
CY8C20534-12PVXI from Infineon Technologies (formerly Cypress Semiconductor) is a programmable 8-bit PSoC® System-on-Chip with integrated CapSense® capacitive sensing engine, M8C CPU core running up to 12 MHz, 8 KB flash, 512 bytes SRAM, and 28 GPIOs supporting configurable analog inputs and 20-mA sink drive - deployed in human-interface applications such as touch-button control panels and proximity-sensing consumer electronics.
For engineers reviewing the CY8C20534-12PVXI datasheet, CY8C20534-12PVXI pinout, CY8C20534-12PVXI application, or CY8C20534-12PVXI equivalent, key selection criteria include its dedicated hardware-accelerated CapSense block, 2.4–5.25 V operating range, industrial temperature support (–40 °C to +85 °C), I²C/SPI communication flexibility, and on-chip 32-kHz low-power oscillator for sleep-mode timing.
Technical Context
The device implements a Harvard-architecture M8C core with deterministic interrupt handling and ISSP capability, paired with a dedicated analog subsystem containing relaxation oscillators, comparators, and IDAC-based charge-transfer sensing circuitry optimized for self-capacitance and mutual-capacitance measurement without external components.
Its CapSense block operates independently of the CPU during scan cycles, using configurable clock sources (IMO/RO), automatic baseline tracking, and noise-immune digital filtering - enabling robust touch detection at sub-10 µA active current and <1 µA deep-sleep current with wake-on-touch capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 12 MHz max clock - enables real-time sensor scanning with deterministic latency under firmware control. |
| Flash Memory | 8 KB with 50,000 erase/write cycles - supports field-upgradable CapSense tuning parameters and firmware patches without external storage. |
| SRAM | 512 bytes - sufficient for runtime CapSense baseline buffers, gesture state machines, and I²C/SPI transaction stacks. |
| CapSense Inputs | Up to 28 GPIO-configurable channels - allows full-panel button arrays, linear sliders, or proximity zones on single-package layout. |
| Operating Voltage | 2.4 V to 5.25 V - compatible with coin-cell, Li-ion, and 3.3/5 V rail systems without level-shifting. |
| Temperature Range | –40 °C to +85 °C - validated for automotive interior controls and industrial HMI environments. |
| I/O Drive | 20 mA sink per GPIO, 5 mA strong drive on Port 1 - drives LEDs or small relays directly without external drivers. |
Pinout & Package
Package: 28-pin SSOP (Small Outline Integrated Circuit), 300-mil body width, lead pitch 0.025 inch - RoHS-compliant, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 2.4–5.25 V; powers digital core, CapSense analog block, and internal LDO. |
| VSS | Ground reference | Common return for all digital and analog circuits; must be low-impedance for noise-free sensing. |
| P0[0]–P0[7] | General-purpose I/O with CapSense support | Configurable as analog input, digital I/O, or CapSense electrode; share global analog bus. |
| P1[0]–P1[7] | Digital I/O with regulated 3.0 V output | Port 1 supports selectable 3.0 V LDO-regulated drive - enables consistent LED brightness across voltage variation. |
| P2[0]–P2[7] | General-purpose I/O with CapSense support | Same analog mux routing as P0; extends electrode count for large touch surfaces. |
| SCL / SDA | I²C interface pins | Support 50/100/400 kHz modes; internally pulled up - simplifies host MCU integration with no external resistors required. |
| SPICLK / MOSI / MISO / SS | SPI interface pins | Configurable as master or slave; clock rate scalable from 46.9 kHz to 3 MHz based on IMO frequency. |
| XTAL_IN / XTAL_OUT | External crystal oscillator terminals | Optional 32.768 kHz crystal connection for precise sleep/wake timing; not required for basic operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated CapSense hardware block | Offloads touch scanning from CPU, enabling <10 ms full-panel scan at 5 V with <5 µA average current in active mode. |
| Configurable analog multiplexer | Connects any GPIO to internal comparator or IDAC - supports multi-electrode sliders, touchpads, and proximity sensors on shared pins. |
| Internal 32-kHz low-speed oscillator (ILO) | Enables ultra-low-power sleep states with wake-on-touch; no external crystal needed for basic timing. |
| On-chip 3.0 V LDO regulator | Provides stable 3.0 V output for Port 1 I/O - eliminates need for external voltage regulation in mixed-voltage designs. |
| In-system serial programming (ISSP) | Allows firmware updates via two-wire interface using only VDD, VSS, SCLK, and SDATA - reduces production test complexity. |
Applications
| Smart Appliance Control Panel | Industrial Human-Machine Interface |
|---|---|
|
Use Scenario: Touch-sensitive front panel on washing machines, ovens, or HVAC controllers requiring waterproof, ESD-robust user input. IC Role / Device Role / Timing Role: Primary capacitive sensing controller; performs real-time button/slide detection and debounces gestures using hardware-accelerated algorithms. Use Value: Eliminates mechanical switches and overlay film layers, reducing BOM cost by >30% while improving IP65 seal integrity and long-term reliability. |
Use Scenario: Operator terminal in factory automation equipment exposed to dust, vibration, and wide ambient temperature swings. IC Role / Device Role / Timing Role: Standalone HMI processor managing up to 28 discrete touch zones and driving status LEDs via Port 1's regulated 3.0 V outputs. Use Value: Maintains consistent touch sensitivity from –40 °C to +85 °C without recalibration, verified per IEC 61000-4-2 Level 4 ESD testing. |
| Consumer Electronics Remote Control | Medical Device Touch Interface |
|
Use Scenario: Slim, battery-powered remote with slider volume control and backlit touch keys for TV/audio systems. IC Role / Device Role / Timing Role: Low-power CapSense manager with wake-on-touch and integrated LED drive - handles both sensing and indicator control. Use Value: Achieves >1-year coin-cell life via sub-1 µA deep-sleep current and hardware-triggered wake, eliminating software polling overhead. |
Use Scenario: Touch-enabled patient monitor front panel requiring high immunity to EMI from adjacent RF-emitting diagnostic modules. IC Role / Device Role / Timing Role: EMI-hardened capacitive controller using differential scanning, shield driver, and adaptive noise rejection algorithms. Use Value: Passes EN 60601-1-2 4th edition radiated susceptibility testing at 10 V/m (80 MHz–2.7 GHz) without shielding cans or guard traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive sensing controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT42QT2120-MAHR | QTouch®-based 12-channel standalone controller; no programmable CPU or flash memory. | Limited to fixed-function button/slider layouts; no firmware customization or gesture logic. | Select when design requires zero-code, certified touch solution with minimal footprint and lowest BoM cost. |
| STM32F072CBT6 | Cortex-M0 MCU with 128 KB flash, 16 KB RAM, and capacitive sensing library (TSI); requires external firmware development. | Higher processing headroom for sensor fusion (e.g., touch + temp + motion), but adds 3× code size and validation effort. | Select when future expansion to multi-sensor HMI or OTA updates is required, and engineering bandwidth supports full firmware ownership. |
Compared with AT42QT2120-MAHR and STM32F072CBT6, CY8C20534-12PVXI delivers balanced trade-offs: hardware-accelerated CapSense with embedded firmware programmability, minimal external components, and proven qualification for industrial temperature and ESD stress - making it optimal for cost-sensitive, time-to-market-critical touch interfaces.
Availability
CY8C20534-12PVXI is available at Aetrix Electronics and suitable for smart appliance control panels, industrial HMI terminals, and battery-powered remote controls requiring stable component supply, long-lifecycle support, and qualified capacitive sensing performance.
Supply support for CY8C20534-12PVXI includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Infineon Technologies acquired Cypress Semiconductor in 2020 and maintains full product continuity, technical documentation, and long-term supply commitment for the PSoC® portfolio.
CY8C20534-12PVXI belongs to the PSoC® CapSense® family - engineered specifically for cost-effective, high-reliability capacitive touch interfaces where hardware acceleration, low power, and simplified system integration are primary design goals.
FAQ
Does CY8C20534-12PVXI require an external crystal for basic CapSense operation?
No. The device includes an internal 32-kHz low-speed oscillator (ILO) that enables full CapSense functionality, including sleep/wake and baseline tracking, without any external timing components. An external 32.768 kHz crystal is optional and only needed for higher-precision timing in applications demanding ±20 ppm accuracy over temperature.
Can CY8C20534-12PVXI drive LEDs directly without external transistors?
Yes. Port 1 supports a selectable 3.0 V regulated output with up to 20 mA total source current. Individual pins can drive standard 20-mA LEDs directly, and the LDO bypass mode allows use of unregulated VDD for higher-current or mixed-voltage LED configurations.
What development tools are supported for firmware configuration and CapSense tuning?
PSoC Designer™ - Cypress' free Windows-based IDE - is fully supported. It provides drag-and-drop CapSense User Module configuration, real-time tuning via USB-I²C bridge (e.g., CY3280-20x34 kit), and on-chip debug with 128 KB trace memory for gesture algorithm validation.
Is the CY8C20534-12PVXI pin-compatible with other CY8C20x34 variants?
Yes, all CY8C20x34 devices in the 28-pin SSOP package (e.g., CY8C20434, CY8C20634) share identical pinouts and electrical characteristics. Firmware and layout are interchangeable; differences lie only in flash size, GPIO count, and analog resource allocation - verified in the device selector table of datasheet 001-05356 Rev. *W.
CY8C20534-12PVXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Series:
- PSOC™1 CY8C20xxx
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 12MHz
- Connectivity:
- I2C, SPI
- Peripherals:
- LVD, POR, WDT
- Number of I/O:
- 24
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.4V ~ 5.25V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C20534-12PVXI FAQ
1.How can I place an order for CY8C20534-12PVXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C20534-12PVXI on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for CY8C20534-12PVXI reliable?
The price and inventory of CY8C20534-12PVXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C20534-12PVXI is usually 5 days.
3.What payment methods are accepted for CY8C20534-12PVXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C20534-12PVXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C20534-12PVXI?
CY8C20534-12PVXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C20534-12PVXI order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for CY8C20534-12PVXI?
For technical support, including CY8C20534-12PVXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C20534-12PVXI requirements.
6.How does Aetrix verify that CY8C20534-12PVXI is sourced from the original manufacturer or authorized distributors?
All CY8C20534-12PVXI products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CY8C20534-12PVXI meets industry standards.
7.What is the process for return or replacement of CY8C20534-12PVXI?
All CY8C20534-12PVXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C20534-12PVXI, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The CY8C20534-12PVXI part is unused and in its original packaging.
Return procedure for CY8C20534-12PVXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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