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Infineon Technologies CY8C21334B-24PVXIT
- Part No.:
- CY8C21334B-24PVXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
CY8C21334B-24PVXIT.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,969
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Product details
Overview
CY8C21334B-24PVXIT from Cypress Semiconductor is a programmable PSoC 1 mixed-signal SoC 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 (down to 1.0 V with on-chip SMP), and features 8 KB Flash / 512 B SRAM for embedded human interface applications in industrial control panels and consumer appliances.
For engineers reviewing the CY8C21334B-24PVXIT datasheet, CY8C21334B-24PVXIT pinout, CY8C21334B-24PVXIT application, or CY8C21334B-24PVXIT equivalent, key selection criteria include CapSense channel count, SmartSense auto-tuning capability, analog block configuration (Type E), GPIO drive strength (25 mA sink), and I²C/SPI/UART peripheral availability in the 28-pin SSOP package.
Technical Context
This device implements a dedicated CapSense® subsystem using patented CSD (Capacitive Sigma-Delta) sensing with SmartSense_EMC runtime auto-tuning-dynamically adjusting sensor thresholds and IDACs to maintain performance across temperature, voltage, and environmental drift. The analog system comprises four Type E PSoC blocks supporting dual 10-bit ADCs, comparators with DAC references, and driven-shield functionality for water-tolerant and metal-immune proximity sensing.
The digital system integrates four configurable digital PSoC blocks enabling user-defined peripherals including 8–32-bit timers, PWMs, full-duplex UART, SPI master/slave, and CRC/PRS modules-all routable to any of the 20 GPIOs. Clocking includes ±2.5% internal 24/48 MHz IMO and low-power ILO, with errata noting ±5% deviation outside 0–70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Processor | M8C 8-bit Harvard architecture, 24 MHz max clock - enables real-time CapSense scanning and firmware logic without external MCU. |
| CapSense Channels | Up to 21 buttons or 4 sliders - implemented via 4 analog + 3 digital PSoC blocks, supporting multi-touch and proximity detection. |
| Operating Voltage | 2.4 V to 5.25 V; down to 1.0 V with on-chip switch-mode pump - allows single-cell battery operation in portable touch interfaces. |
| Memory | 8 KB Flash (50k erase/write cycles), 512 B SRAM - sufficient for CapSense firmware, calibration data, and host communication stacks. |
| I/O Drive | 25 mA sink / 10 mA source per GPIO - drives LEDs or small relays directly, reducing BOM count in HMI designs. |
| Peripherals | I²C (400 kHz), SPI, UART, 10-bit ADC, comparators, PWM, timers - supports sensor fusion, status reporting, and actuator control alongside touch. |
| Temperature Range | −40 °C to +85 °C - qualified for industrial and automotive cabin environments without derating. |
Pinout & Package
Package: 28-pin SSOP (Small Outline Integrated Circuit), body width 7.5 mm, lead pitch 0.635 mm, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Main supply rail (2.4–5.25 V); powers digital core, analog blocks, and CapSense IDACs. |
| VSS | Ground reference | Digital and analog common return; requires low-impedance connection for stable CapSense baseline. |
| P0[0]–P0[7] | GPIO / CapSense electrode | Configurable as analog inputs for CapSense, ADC, or comparator; support driven shield for noise immunity. |
| P1[0]–P1[7] | GPIO / digital peripheral I/O | Routable to UART, SPI, I²C, PWM, or timer outputs; support interrupt-on-change for wake-from-sleep. |
| P2[0]–P2[3] | GPIO / analog mux input | Connect to internal analog bus for ADC or comparator use; enable 8:1 analog multiplexer routing from Port 0. |
| XRES | Active-low reset input | Asynchronous hardware reset; pulls internal POR circuitry low to force cold start and CapSense reinitialization. |
| XTAL1/XTAL2 | Crystal oscillator terminals | Optional external crystal (up to 24 MHz) for precision timing; not required due to internal IMO. |
Key Features
| Feature | Design Value |
|---|---|
| SmartSense™ Auto-Tuning | Runtime compensation for environmental drift and manufacturing variation - eliminates manual tuning during production and field deployment. |
| Driven Shield Support | Reduces parasitic coupling and improves signal-to-noise ratio in wet or metal-rich environments - enables IP67-rated touch interfaces. |
| Type E Analog Blocks | Four configurable analog resources supporting dual 10-bit ADCs, comparators with 1.3 V reference or DAC-based thresholds - enables simultaneous slider + button + proximity sensing. |
| Configurable GPIO Drive Modes | Pull-up, pull-down, high-Z, strong, open-drain on all pins - simplifies interface to diverse peripherals (LEDs, switches, sensors) without external components. |
| In-System Serial Programming | ISSP via dedicated pins - allows firmware updates in final assembly or field, supporting partial flash updates and EEPROM emulation. |
Applications
| Home Appliance Control Panel | Industrial HMI Keypad |
|---|---|
Use Scenario: Touch-sensitive front panel on microwave oven or washing machine with water exposure risk. IC Role / Device Role / Timing Role: Primary CapSense controller managing 12 buttons and 2 rotary sliders; performs real-time baseline tracking and noise rejection. Use Value: Driven shield and SmartSense eliminate false triggers from condensation or hand moisture, ensuring reliable operation without mechanical keys. | Use Scenario: Dust- and vibration-prone operator interface on PLC-controlled machinery. IC Role / Device Role / Timing Role: Standalone touch controller interfacing with RS-485 host via UART; handles debounce, LED feedback, and low-power sleep/wake cycles. Use Value: −40 °C to +85 °C rating and 25 mA GPIO sink drive enable direct LED control and robust operation in unconditioned enclosures. |
| Proximity-Based Access Terminal | Consumer Electronics Remote Interface |
Use Scenario: Contactless wake-up sensor on smart lock or access kiosk detecting hand approach within 5 cm. IC Role / Device Role / Timing Role: Proximity sensing node using CSD algorithm with adaptive threshold; triggers system power-up via GPIO interrupt. Use Value: SmartSense_EMC auto-tunes sensitivity to ambient EMI and housing material variations, eliminating factory calibration per unit. | Use Scenario: Touch-enabled remote for AV receiver with backlight control and battery monitoring. IC Role / Device Role / Timing Role: System-on-chip handling CapSense, LED PWM dimming, I²C battery gauge readout, and low-voltage detection. Use Value: On-chip SMP enables 1.0 V operation from single alkaline cell, extending battery life while maintaining full CapSense functionality. |
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-SX24T | Lower channel count (12 buttons), no SmartSense, 4 KB Flash, no driven shield | Limited to dry-environment basic touch panels; lacks auto-tuning and proximity robustness | Select when cost sensitivity outweighs environmental resilience and development time savings. |
| MTCH101-I/ST | Dedicated single-chip CapTouch controller, I²C-only interface, no programmable CPU or analog peripherals | Fixed-function touch only; requires external MCU for system logic or communication protocol handling | Select when design requires minimal footprint and ultra-low power sleep, but forfeits firmware customization. |
Compared with CY8C21334B-24PVXIT, CY8C201A0-SX24T offers lower integration and no SmartSense, increasing qualification effort; MTCH101-I/ST reduces code development burden but adds MCU dependency and limits sensor flexibility-making the CY8C21334B optimal for self-contained, field-adaptive touch systems.
Availability
CY8C21334B-24PVXIT is available at Aetrix Electronics and suitable for industrial HMI, home appliance control panels, and proximity-based access terminals requiring stable component supply, long-term lifecycle support, and consistent CapSense performance across production batches.
Supply support for CY8C21334B-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) is a fabless semiconductor company specializing in programmable embedded solutions, memory, and connectivity products for industrial, automotive, and consumer markets.
The CY8C21x34B belongs to the PSoC 1 family-designed to replace discrete analog/digital components with a single configurable SoC for human interface, sensor conditioning, and mixed-signal control applications.
FAQ
Does CY8C21334B-24PVXIT support true waterproof touch operation?
Yes-it supports water-tolerant designs via driven shield functionality and SmartSense auto-tuning, which dynamically compensates for capacitance shifts caused by water films. Cypress application note AN72990 validates operation under simulated condensation and splash conditions, though full submersion requires mechanical sealing.
Can the internal 24 MHz oscillator meet timing-critical CapSense scanning requirements?
Yes-the internal main oscillator (IMO) delivers ±2.5% accuracy across 0–70°C and ±5% over −40–85°C, sufficient for CapSense baseline tracking and scan rate consistency. For tighter timing, an external crystal can be used on XTAL1/XTAL2, though SmartSense adapts to minor frequency drift.
How many GPIOs are available for general-purpose use in the 28-pin SSOP package?
The CY8C21334B-24PVXIT in 28-pin SSOP provides 20 usable GPIOs: P0[0–7], P1[0–7], and P2[0–3]. VDD, VSS, XRES, and XTAL1/XTAL2 are dedicated power/clock/reset pins and not configurable as GPIOs.
Is ISSP programming supported in-system without removing the device from the PCB?
Yes-In-System Serial Programming is fully supported via dedicated ISSP pins (SDA, SCL, SCLK, XRES) using standard SWD/JTAG adapters like MiniProg3. Firmware updates, calibration data writes, and partial flash modifications can be performed in final assembly or field deployment.
CY8C21334B-24PVXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 20-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:
- 16
- 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:
CY8C21334B-24PVXIT FAQ
1.How can I place an order for CY8C21334B-24PVXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C21334B-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 CY8C21334B-24PVXIT reliable?
The price and inventory of CY8C21334B-24PVXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C21334B-24PVXIT is usually 5 days.
3.What payment methods are accepted for CY8C21334B-24PVXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C21334B-24PVXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C21334B-24PVXIT?
CY8C21334B-24PVXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C21334B-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 CY8C21334B-24PVXIT?
For technical support, including CY8C21334B-24PVXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C21334B-24PVXIT requirements.
6.How does Aetrix verify that CY8C21334B-24PVXIT is sourced from the original manufacturer or authorized distributors?
All CY8C21334B-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 CY8C21334B-24PVXIT meets industry standards.
7.What is the process for return or replacement of CY8C21334B-24PVXIT?
All CY8C21334B-24PVXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C21334B-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 CY8C21334B-24PVXIT part is unused and in its original packaging.
Return procedure for CY8C21334B-24PVXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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