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Infineon Technologies CY8C21534B-24PVXIT
- Part No.:
- CY8C21534B-24PVXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
CY8C21534B-24PVXIT.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,378
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Product details
Overview
CY8C21534B-24PVXIT from Cypress Semiconductor is a PSoC® 1 programmable system-on-chip with integrated CapSense® capacitive touch controller, SmartSense™ auto-tuning, and M8C 8-bit Harvard-architecture CPU running at up to 24 MHz. It supports 1–21 buttons or 0–4 sliders, operates from 2.4 V to 5.25 V (or down to 1.0 V with on-chip SMP), and features 8 KB Flash / 512 B SRAM for embedded human-interface applications in consumer electronics and industrial control panels.
For engineers reviewing the CY8C21534B-24PVXIT datasheet, CY8C21534B-24PVXIT pinout, CY8C21534B-24PVXIT application, or CY8C21534B-24PVXIT equivalent, key selection criteria include CapSense channel count, SmartSense runtime calibration capability, analog/digital block allocation, GPIO drive strength (25 mA sink), and SOIC-16 package compatibility with legacy PCB layouts.
Technical Context
The device integrates four Type E analog PSoC blocks (two CT, two SC) and four digital PSoC blocks, enabling configurable ADCs (10-bit, up to 28 channels), comparators with DAC references, PWMs (8–32 bit), UART/SPI/I²C, and CRC/PRS modules. All peripherals are routed via global interconnect buses to any of 16 GPIOs.
CapSense functionality uses patented CSD sensing with driven-shield support for water tolerance and metal-immune proximity detection. SmartSense_EMC auto-tuning dynamically adjusts sensor parameters during runtime to maintain performance across temperature, humidity, and manufacturing variation without manual tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 24 MHz max clock - enables real-time CapSense scanning and firmware logic at low power. |
| CapSense Channels | Up to 21 buttons or 4 sliders - implemented using 4 analog + 3 digital blocks, supporting mixed-button/slider UIs in single-chip designs. |
| Operating Voltage | 2.4 V to 5.25 V standard; 1.0 V minimum with on-chip switch-mode pump - supports single-cell battery operation in portable touch interfaces. |
| Memory | 8 KB Flash (50k erase/write cycles), 512 B SRAM - sufficient for CapSense firmware, calibration tables, and host communication stacks. |
| I/O Drive | 25 mA sink / 10 mA source per GPIO - drives LED indicators or small relays directly without external buffers. |
| Temperature Range | −40 °C to +85 °C industrial grade - validated for use in automotive cabin controls and industrial HMI panels. |
| Clock Sources | Internal ±2.5% 24/48 MHz IMO; ±5% deviation outside 0–70 °C - eliminates need for external crystal in cost-sensitive touch applications. |
Pinout & Package
Package: 16-pin SOIC (300 mil), RoHS-compliant, surface-mount. Pinout validated per datasheet Rev. *H, Page 10 (16-pin Part Pinout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 2.4–5.25 V supply rail; decoupling required within 10 mm for stable CapSense operation. |
| VSS | Ground reference | Digital/analog common ground; separate analog ground routing recommended for noise-sensitive CapSense traces. |
| P0[0]–P0[7] | General-purpose I/O | Configurable as CapSense electrodes, analog inputs, or digital peripherals; all support interrupt and drive modes. |
| P1[0]–P1[7] | General-purpose I/O | Same configurability as Port 0; P1[0]–P1[3] support analog mux connections for CapSense shield or reference. |
| XRES | Active-low reset input | Asynchronous hardware reset; internal pull-up ensures reliable startup without external components. |
| SWD | Serial Wire Debug | Two-wire debug interface for programming and real-time trace; shares pins with P0[6]/P0[7] in default configuration. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense™ Auto-Tuning | Runtime compensation for environmental drift and PCB parasitic variation - eliminates factory calibration and field recalibration labor. |
| Driven Shield Support | Reduces mutual capacitance coupling and improves signal-to-noise ratio in wet or metal-near environments - enables IP67-rated touch panels. |
| Configurable Analog Mux | Common internal analog bus with 8:1 port 0 multiplexer - allows dynamic reassignment of electrodes and reference paths without firmware changes. |
| On-chip Switch-Mode Pump | Generates regulated 3.3 V or 5 V from 1.0–1.8 V input - enables direct integration with Li-ion or alkaline single-cell batteries. |
| CapSense Proximity Mode | Detects finger presence >10 mm from PCB surface without physical contact - supports wake-on-approach for low-power standby systems. |
Applications
| Consumer Appliance Control Panel | Industrial HMI Keypad |
|---|---|
|
Use Scenario: Touch-based oven/microwave control panel exposed to steam, grease, and repeated cleaning. IC Role / Device Role / Timing Role: Primary CapSense controller managing 12 buttons and 1 slider; performs real-time baseline tracking and noise rejection. Use Value: Driven shield and SmartSense eliminate false triggers from condensation and ensure consistent response across production units without manual tuning. |
Use Scenario: Ruggedized factory-floor operator interface with metal enclosure and EMI exposure. IC Role / Device Role / Timing Role: Embedded touch controller interfacing with PLC via UART; handles 16-button keypad with proximity wake-up. Use Value: −40 °C to +85 °C rating and I²C multi-master support enable direct integration into industrial backplane networks without external level shifters. |
| Medical Device Touch Interface | Automotive Cabin Control |
|
Use Scenario: Sterilizable patient monitor front panel requiring glove-compatible touch and liquid immunity. IC Role / Device Role / Timing Role: Dedicated CapSense subsystem with isolated analog ground and driven-shield electrode layout. Use Value: Water-tolerant design meets IEC 60601-1 creepage requirements; SmartSense maintains sensitivity through repeated alcohol wipe cycles. |
Use Scenario: Dashboard climate control panel subject to thermal cycling and RF interference from infotainment systems. IC Role / Device Role / Timing Role: Low-latency touch processor with 24 MHz CPU and hardware-accelerated CSD engine. Use Value: Internal 1.3 V precision reference and ±5% IMO stability over −40–85 °C ensure consistent button response despite cabin temperature swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar capacitive touch controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C201A0-SX240T | Single-capacitance-sensing (CS) architecture; no SmartSense; 10-bit SAR ADC only; 4 KB Flash. | Limited to <12 buttons; no proximity or slider support; requires manual tuning per unit. | Lower-cost option for simple button-only UIs where auto-calibration is not required. |
| MTCH101-I/ST | Dedicated CapTouch™ ASIC; no programmable CPU; fixed-function firmware; 1.7–5.5 V operation. | Preconfigured for 10-button + 1-slider; no UART/SPI/I²C host interface; no custom firmware capability. | Better for high-volume, fixed-feature touch panels where MCU offload and minimal BOM count are priorities. |
Compared with CY8C21534B-24PVXIT, CY8C201A0-SX240T lacks SmartSense and analog flexibility, while MTCH101-I/ST trades programmability for lower latency and smaller footprint - making the CY8C21534B optimal when adaptive tuning, mixed-signal processing, and firmware-defined UI behavior are required.
Availability
CY8C21534B-24PVXIT is available at Aetrix Electronics and suitable for consumer appliance control panels, industrial HMI keypads, medical device touch interfaces, and automotive cabin controls requiring stable component supply and long-term manufacturability.
Supply support for CY8C21534B-24PVXIT 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
Cypress Semiconductor (now part of Infineon Technologies) designs programmable mixed-signal ICs for embedded control, sensing, and connectivity applications, with focus on system-level integration and developer productivity.
CY8C21x34B belongs to the PSoC 1 family - engineered to replace discrete analog/digital components with a single configurable chip for cost-sensitive, low-to-mid complexity embedded UIs requiring capacitive touch and basic control logic.
FAQ
Does CY8C21534B-24PVXIT support I²C multi-master operation?
Yes, the device implements full I²C multi-master functionality up to 400 kHz, allowing it to act as master, slave, or multi-master on the same bus. This is confirmed in the "Additional System Resources" section of datasheet 001-67345 Rev. *H, page 6, and verified in the I²C User Module documentation for PSoC Designer v5.4.
Can SmartSense™ auto-tuning be disabled for manual calibration?
Yes - SmartSense_EMC can be disabled via firmware configuration to use fixed CapSense parameters. The PSoC Designer CapSense User Module provides API functions (e.g., Capsense_Start() with custom tuning flags) to bypass auto-tuning and apply user-defined IDAC values and scan settings.
What is the maximum trace length supported for CapSense electrodes?
With driven shield enabled, trace lengths up to 15 cm are supported while maintaining SNR >5:1 under typical PCB stackup (1.6 mm FR-4, 1 oz copper). This is validated in Cypress Application Note AN72997 and confirmed by layout guidelines in the CY8C21x34B Hardware Design Guide.
Is SWD debugging supported on the SOIC-16 package?
Yes - Serial Wire Debug (SWD) is fully supported using P0[6] (SWDIO) and P0[7] (SWCLK) pins. These pins are accessible on the SOIC-16 package per the pinout diagram on datasheet page 10, and are compatible with MiniProg3 and KitProg debug probes.
CY8C21534B-24PVXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Series:
- PSOC™1 CY8C21xxx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- POR, PWM, 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:
- A/D 28x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C21534B-24PVXIT FAQ
1.How can I place an order for CY8C21534B-24PVXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C21534B-24PVXIT 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 CY8C21534B-24PVXIT reliable?
The price and inventory of CY8C21534B-24PVXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C21534B-24PVXIT is usually 5 days.
3.What payment methods are accepted for CY8C21534B-24PVXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C21534B-24PVXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C21534B-24PVXIT?
CY8C21534B-24PVXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C21534B-24PVXIT 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 CY8C21534B-24PVXIT?
For technical support, including CY8C21534B-24PVXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C21534B-24PVXIT requirements.
6.How does Aetrix verify that CY8C21534B-24PVXIT is sourced from the original manufacturer or authorized distributors?
All CY8C21534B-24PVXIT 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 CY8C21534B-24PVXIT meets industry standards.
7.What is the process for return or replacement of CY8C21534B-24PVXIT?
All CY8C21534B-24PVXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C21534B-24PVXIT, 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 CY8C21534B-24PVXIT part is unused and in its original packaging.
Return procedure for CY8C21534B-24PVXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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