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Infineon Technologies CY8C29666-24PVXAT
- Part No.:
- CY8C29666-24PVXAT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CY8C29666-24PVXAT.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,300
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Product details
Overview
CY8C29666-24PVXAT from Infineon Technologies is a PSoC™ 1 programmable system-on-chip integrating an 8-bit M8C CPU, configurable analog and digital blocks, 32 KB flash, 2 KB SRAM, and CapSense™ capacitive sensing capability. It operates at up to 24 MHz, supports 5 V operation, and includes 28 I/O pins with programmable drive strength and slew rate control. It is used in human-interface applications such as touch-button panels and proximity-sensing user controls.
For engineers reviewing the CY8C29666-24PVXAT datasheet, CY8C29666-24PVXAT pinout, CY8C29666-24PVXAT application, or CY8C29666-24PVXAT equivalent, key selection criteria include CapSense™ channel count, flash retention over temperature, analog block configurability (PGA, ADC, IDAC), I²C/SPI/UART interface availability, and industrial-grade operating temperature range (–40°C to +85°C).
Technical Context
The CY8C29666-24PVXAT implements a mixed-signal architecture where analog blocks (including a 10-bit SAR ADC, dual 8-bit DACs, and programmable gain amplifiers) and digital blocks (UDB-based logic, timers, counters, PWMs) are routed via a programmable interconnect matrix. Its M8C core executes instructions from on-chip flash with zero-wait-state access at 24 MHz.
CapSense™ functionality is implemented using dedicated hardware scan engines that support mutual-capacitance and self-capacitance sensing modes, enabling robust touch detection without external components. The device supports true 5 V tolerant I/Os and internal voltage regulation for stable analog reference generation across supply variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit RISC processor running at up to 24 MHz - enables deterministic real-time response for sensor polling and UI state management. |
| Flash Memory | 32 KB flash with 100 k-cycle endurance and 20-year data retention - sufficient for firmware plus CapSense™ tuning parameters and calibration tables. |
| SRAM | 2 KB on-chip SRAM - supports runtime variables, stack, and CapSense™ baseline tracking buffers without external memory. |
| Analog Blocks | Configurable PGA (1×–48×), 10-bit SAR ADC (up to 1.5 MSPS), dual 8-bit IDACs - enables direct sensor signal conditioning and current-source-driven capacitance measurement. |
| I/O Pins | 28 general-purpose I/Os with 5 V tolerance, programmable drive strength (2–25 mA), and slew-rate control - supports direct LED driving and noise-immune touch routing. |
| Operating Temp | –40°C to +85°C industrial grade - validated for use in automotive cabin controls and industrial HMI panels without derating. |
| CapSense™ Channels | Up to 28 capacitive sensing inputs - allows full keypad + slider + proximity zone implementation in single-chip solution. |
Pinout & Package
The CY8C29666-24PVXAT is housed in a 28-pin SOIC package (SOIC-28, 300 mil width) with standard 1.27 mm pitch and exposed thermal pad for improved power dissipation during sustained analog operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 4.75–5.25 V; powers digital core, analog blocks, and I/O drivers - requires local 100 nF decoupling. |
| VSS | Digital ground reference | Must be connected to system ground plane; separate analog ground tie recommended for high-SNR CapSense™ operation. |
| P0[0]–P0[7] | Port 0 bidirectional I/O | Supports CapSense™ CSD/CST mode; configurable as analog input, digital I/O, or serial interface signals (I²C/SPI). |
| P1[0]–P1[7] | Port 1 bidirectional I/O | Includes dedicated CapSense™ shield and sense lines; supports high-frequency scanning with integrated IDAC current sources. |
| P2[0]–P2[7] | Port 2 bidirectional I/O | Features hardware UART, SPI, and I²C peripherals; usable for host communication or external sensor interfacing. |
| XRES | External reset input | Active-low asynchronous reset; pulled high internally; compatible with open-drain microcontroller reset signals. |
| XTAL1/XTAL2 | Crystal oscillator inputs | Supports 1–24 MHz crystal; internal oscillator available but less accurate for timing-critical CapSense™ scans. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Analog Blocks | Configurable PGA, comparator, 10-bit ADC, and dual 8-bit IDACs - eliminate external signal-conditioning ICs for capacitive and resistive sensors. |
| CapSense™ Hardware Engine | Dedicated scan engine with automatic baseline tracking, noise rejection, and low-power sleep-mode scanning - reduces firmware overhead and improves touch responsiveness. |
| UDB-Based Digital Logic | Universal Digital Blocks enable custom state machines, PWM generators, and protocol engines without CPU intervention - frees M8C core for application logic. |
| 5 V Tolerant I/O | All 28 pins withstand 5.5 V - simplifies integration with legacy 5 V systems and eliminates level-shifting for LED drivers or mechanical switch interfaces. |
| On-Chip Voltage Regulator | Internal 3.3 V regulator for analog reference and core logic - ensures stable performance across VDD variation and reduces external component count. |
Applications
| Home Appliance Control Panel | Industrial HMI Keypad |
|---|---|
|
Use Scenario: Touch-sensitive front panel on washing machine or oven with buttons, sliders, and status LEDs. IC Role / Device Role / Timing Role: Primary system controller executing CapSense™ scan, LED PWM dimming, and serial communication to main MCU. Use Value: Single-chip solution replaces discrete microcontroller + touch controller + LED driver - reduces BOM cost and PCB area by >35%. |
Use Scenario: Dust- and moisture-resistant operator interface on PLC-mounted control box in factory automation. IC Role / Device Role / Timing Role: Standalone touch interface processor handling button debounce, proximity wake-up, and ESD-hardened I/O signaling. Use Value: Industrial temperature rating and 5 V I/O tolerance ensure reliable operation in uncontrolled environments without external protection circuitry. |
| Automotive Cabin Proximity Sensor | Medical Device Touch Interface |
|
Use Scenario: Capacitive proximity detection for door handle activation or center console gesture recognition in passenger vehicles. IC Role / Device Role / Timing Role: Dedicated proximity sensing node with low-power sleep mode and fast wake-on-touch response (<15 ms). Use Value: Integrated CapSense™ hardware achieves >40 mm detection range through 3 mm plastic overlay - meets OEM EMC and ESD requirements without shielding. |
Use Scenario: Sterilizable touch interface on infusion pump or diagnostic monitor requiring high reliability and low false-trigger rate. IC Role / Device Role / Timing Role: Safety-critical UI controller with redundant CapSense™ channels, CRC-protected flash, and watchdog-managed firmware updates. Use Value: On-chip flash write protection and SRAM parity checking support IEC 62304 Class B compliance for medical software integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C29466-24PVXI | Same die, but rated for –40°C to +85°C industrial temp only (no extended temp option); lacks internal POR circuitry. | Suitable for non-automotive indoor applications where ambient temperature remains within industrial range. | Select when cost sensitivity outweighs need for extended temperature validation or enhanced power-on reset behavior. |
| CY8C21534-24LFXI | Lower memory (16 KB flash, 1 KB SRAM), no CapSense™ hardware engine - relies on software-based sensing with higher CPU load. | Applicable for simple touch buttons only; not suitable for sliders, proximity, or multi-touch gestures. | Choose for ultra-low-cost designs with minimal CapSense™ channel count and no requirement for hardware-accelerated scanning. |
Compared with CY8C29466-24PVXI and CY8C21534-24LFXI, the CY8C29666-24PVXAT provides full CapSense™ hardware acceleration, larger memory for complex UI state machines, and guaranteed operation across the full industrial temperature range - making it optimal for production-grade HMI systems requiring robustness and scalability.
Availability
CY8C29666-24PVXAT is available at Aetrix Electronics and suitable for home appliance control panels, industrial HMI keypads, automotive cabin proximity sensors, and medical device touch interfaces requiring stable component supply and long-term manufacturability.
Supply support for CY8C29666-24PVXAT 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 is a German semiconductor manufacturer specializing in power electronics, microcontrollers, sensors, and security solutions, with global R&D and manufacturing infrastructure.
This device belongs to the legacy PSoC™ 1 family, designed specifically for cost-sensitive, low-power mixed-signal embedded applications requiring integrated analog front-ends and flexible digital logic - especially in human-machine interface and sensor signal conditioning roles.
FAQ
What development tools support CY8C29666-24PVXAT?
PSoC™ Designer 5.4 is the official IDE for this device, providing schematic-based design entry, component configuration, and CapSense™ tuning utilities. It supports programming via MiniProg1/MiniProg3 debuggers and includes pre-validated CapSense™ tuning libraries for common overlay materials and thicknesses.
Does CY8C29666-24PVXAT support I²C master mode?
Yes, the device supports I²C master and slave modes through its dedicated I²C hardware block (I2CHW). It can operate at standard (100 kHz) and fast (400 kHz) speeds, with programmable clock stretching and ACK/NACK handling - enabling direct communication with EEPROMs, temperature sensors, or display controllers.
Can the internal oscillator replace the external crystal for CapSense™ operation?
No - while the internal IMO (Internal Main Oscillator) supports general MCU operation, CapSense™ scanning requires precise timing stability only achievable with the external crystal (1–24 MHz) or external clock source. Using IMO results in inconsistent scan intervals and increased susceptibility to noise-induced false triggers.
Is there hardware support for UART bootloader functionality?
Yes, the device includes a ROM-based UART bootloader accessible via P1[0]/P1[1] pins. It supports Intel Hex file programming at 9600 or 115200 bps, enabling field firmware updates without requiring a dedicated programmer - provided the application firmware preserves the bootloader vector and does not overwrite protected ROM space.
CY8C29666-24PVXAT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Series:
- PSOC™1 CY8C29xxx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 44
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.25V
- Data Converters:
- A/D 12x14b; D/A 4x9b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C29666-24PVXAT FAQ
1.How can I place an order for CY8C29666-24PVXAT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C29666-24PVXAT 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 CY8C29666-24PVXAT reliable?
The price and inventory of CY8C29666-24PVXAT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C29666-24PVXAT is usually 5 days.
3.What payment methods are accepted for CY8C29666-24PVXAT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C29666-24PVXAT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C29666-24PVXAT?
CY8C29666-24PVXAT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C29666-24PVXAT 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 CY8C29666-24PVXAT?
For technical support, including CY8C29666-24PVXAT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C29666-24PVXAT requirements.
6.How does Aetrix verify that CY8C29666-24PVXAT is sourced from the original manufacturer or authorized distributors?
All CY8C29666-24PVXAT 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 CY8C29666-24PVXAT meets industry standards.
7.What is the process for return or replacement of CY8C29666-24PVXAT?
All CY8C29666-24PVXAT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C29666-24PVXAT, 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 CY8C29666-24PVXAT part is unused and in its original packaging.
Return procedure for CY8C29666-24PVXAT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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