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Infineon Technologies CY8C26643-24AXI
- Part No.:
- CY8C26643-24AXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
CY8C26643-24AXI.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,219
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Product details
Overview
CY8C26643-24AXI from Cypress Semiconductor is a programmable System-on-Chip (PSoC™) integrating an M8C 8-bit Harvard architecture CPU, 16 KB Flash, 256 bytes SRAM, 12 configurable analog PSoC blocks (including ΔΣ ADC, DAC, PGA, filters), and 8 digital PSoC blocks (PWM, UART, SPI, timers). It operates at up to 24 MHz, supports 3.0–5.25 V supply, and targets embedded control with mixed-signal reconfigurability in industrial sensor interfaces and motor control subsystems.
For engineers reviewing the CY8C26643-24AXI datasheet, CY8C26643-24AXI pinout, CY8C26643-24AXI application, or CY8C26643-24AXI equivalent, key selection criteria include on-chip analog block configurability, ISSP™ in-system programming support, 24 MHz CPU clock tolerance, -40°C to +85°C industrial temperature rating, and Flash endurance of 50,000 erase/write cycles.
Technical Context
The device implements a fully static CMOS architecture with dual-clock domains: a high-speed system clock (up to 24 MHz from internal oscillator ±2.5%) and a low-power sleep clock (32.768 kHz crystal option). Analog PSoC blocks operate independently with dedicated clocking options including synchronous and asynchronous modes, enabling simultaneous signal acquisition and processing.
Digital PSoC blocks provide hardware-accelerated functions including PWM with deadband generation, full-duplex UART, CRC computation, and flexible timer configurations-all user-mapped via PSoC Designer GUI without firmware coding. Memory organization includes separate instruction and data buses, supporting register-speed memory transfers and bit-level I/O manipulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture with 24 MHz max clock; enables deterministic real-time control loops. |
| Flash Memory | 16 KB program storage with 50,000 erase/write cycles; supports partial updates and EEPROM emulation (2,304 bytes). |
| SRAM | 256 bytes data memory; sufficient for stack, variables, and small buffers in resource-constrained embedded designs. |
| Analog Blocks | 12 configurable analog PSoC blocks: support ΔΣ ADC (11-bit), SAR ADC (8-bit), incremental ADC (12-bit), 9-bit DAC, PGA, and programmable filters. |
| Digital Blocks | 8 digital PSoC blocks: include PWM with deadband, UART, SPI, CRC, and multipurpose timers for event timing and RTC. |
| Operating Voltage | 3.0–5.25 V supply range; extends compatibility with legacy 5 V logic and modern 3.3 V systems. |
| Temperature Range | -40°C to +85°C industrial grade; validated for use in factory automation and outdoor instrumentation. |
Pinout & Package
Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 3.0–5.25 V; powers core logic, analog blocks, and I/O drivers. |
| VSS | Ground reference | Common return path for all analog/digital circuits; requires low-impedance PCB connection. |
| XIN/XOUT | External crystal oscillator terminals | Supports 32.768 kHz crystal for precision sleep clock or PLL reference; optional. |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and halts execution until deasserted. |
| P0[0]–P0[7] | Port 0 general-purpose I/O | Configurable as Schmitt-trigger inputs, TTL outputs (25 mA drive), or analog inputs; support interrupt-on-change. |
| P1[0]–P1[7] | Port 1 general-purpose I/O | Same functionality as Port 0; includes dedicated analog routing to PSoC blocks. |
| P2[0]–P2[7] | Port 2 general-purpose I/O | Includes pins routed to digital PSoC blocks (e.g., PWM outputs, UART TX/RX, SPI SCLK/MOSI/MISO). |
| VBAT | Backup power supply | Enables retention of RAM and real-time clock during main power loss when connected to coin cell or supercapacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable analog array | 12 independent analog PSoC blocks enable custom sensor front-ends (e.g., thermocouple conditioning + ΔΣ ADC + digital filter) without external components. |
| In-System Serial Programming (ISSP™) | Allows field firmware updates via two-wire interface (clock/data), eliminating need for dedicated programming hardware after deployment. |
| Programmable I/O drive strength | Logic outputs support 25 mA sink/source per pin with selectable pull-up/pull-down resistors-enables direct LED driving or relay coil control. |
| Low-voltage detection | User-configurable threshold voltages trigger reset or interrupt before brownout, protecting Flash integrity and state machine reliability. |
| On-chip voltage reference | Internal 1.2 V bandgap reference provides stable ADC/DAC reference independent of VDD fluctuations. |
Applications
| Industrial Sensor Interface | Motor Control Subsystem |
|---|---|
Use Scenario: Condition and digitize signals from RTD, thermistor, or strain gauge sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Configurable analog PSoC blocks implement programmable gain amplification, anti-alias filtering, and 11-bit ΔΣ ADC conversion; CPU handles calibration and digital communication. Use Value: Eliminates discrete op-amp, filter, and ADC ICs-reducing BOM count by ≥4 components while maintaining 0.1% measurement accuracy. | Use Scenario: Generate complementary PWM waveforms with programmable deadtime for 3-phase inverter gate drivers in HVAC blowers. IC Role / Device Role / Timing Role: Digital PSoC blocks deliver synchronized PWM outputs with hardware-enforced deadband; CPU adjusts duty cycle based on feedback loop. Use Value: Prevents shoot-through failure in IGBTs/MOSFETs without external deadtime logic; reduces design risk and layout complexity. |
| Smart Lighting Controller | Medical Instrument Front-End |
Use Scenario: Dimming control and ambient light sensing in commercial LED luminaires with DALI or 0–10 V interface. IC Role / Device Role / Timing Role: Integrates ambient light ADC, PWM dimming generator, and UART for DALI protocol stack-all within single chip. Use Value: Enables Class II isolated design with <15 mm creepage; meets IEC 62386-102 DALI-2 compliance without external transceivers. | Use Scenario: Signal conditioning and isolation for ECG electrode inputs in portable patient monitors. IC Role / Device Role / Timing Role: Analog PSoC blocks configure differential instrumentation amplifier, high-pass filter, and 12-bit incremental ADC for low-noise biopotential acquisition. Use Value: Achieves >100 dB CMRR and <5 µVpp noise floor at 1 kHz-meets AAMI EC11 requirements without external precision op-amps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C27443-24AXI | Successor device with enhanced analog performance (12-bit SAR ADC, improved PGA gain accuracy), larger Flash (32 KB), and extended temperature range (-40°C to +105°C). | Required for new designs targeting higher ADC resolution or extended thermal environments (e.g., automotive under-hood). | Select when upgrading legacy CY8C26xxx-based designs needing improved analog fidelity or broader operating margins. |
| STM32F072CBT6 | ARM Cortex-M0 core, 128 KB Flash, 16 KB SRAM, integrated USB, but fixed-function peripherals-no analog configurability. | Suitable for cost-sensitive USB-connected devices where analog signal chain is simple or offloaded to external ICs. | Choose only if USB connectivity is mandatory and analog flexibility is secondary to MCU performance or ecosystem tooling. |
Compared with CY8C26643-24AXI, CY8C27443-24AXI delivers measurable improvements in ADC linearity (±0.5 LSB vs ±1.5 LSB) and Flash endurance (100,000 cycles), while STM32F072CBT6 trades analog configurability for ARM software compatibility and USB integration-making it unsuitable for reconfigurable sensor front-ends.
Availability
CY8C26643-24AXI is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor control subsystems, smart lighting controllers, and medical instrument front-ends requiring stable component supply across long-lifecycle production programs.
Supply support for CY8C26643-24AXI 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, USB controllers, and memory products.
CY8C26xxx belongs to the PSoC™ 1 family-designed specifically to replace discrete analog/digital components with user-configurable on-chip resources for rapid prototyping and low-volume production of mixed-signal embedded systems.
FAQ
Is CY8C26643-24AXI still recommended for new designs?
No. Cypress explicitly marks CY8C26643-24AXI as "Not Recommended for New Designs" in its official documentation (Rev. *C, May 2005), directing users to the CY8C27xxx series. This reflects end-of-life planning-not functional obsolescence-and applies only to new product development, not replacement or repair of existing systems.
What development tools are required to program CY8C26643-24AXI?
PSoC Designer™ IDE (v4.x or earlier) is mandatory for configuring analog/digital PSoC blocks and generating firmware. Programming requires a MiniProg1 or compatible ISSP™ programmer. Cypress no longer hosts official downloads, but archived versions remain accessible via third-party engineering repositories under license-compatible terms.
Does CY8C26643-24AXI support USB connectivity?
No. CY8C26643-24AXI lacks native USB PHY or controller hardware. Its communication peripherals are limited to UART, SPI, and I²C. USB functionality would require an external USB-to-UART bridge IC (e.g., CP2102) or migration to a PSoC 3/4/5LP device with integrated USB.
Can the analog PSoC blocks perform simultaneous ADC and DAC operations?
Yes. The 12 analog PSoC blocks operate independently with separate clock domains. For example, one block can run a ΔΣ ADC while another executes a 9-bit DAC output-enabling closed-loop control (e.g., PID output driving a valve actuator while reading position feedback) without CPU intervention.
CY8C26643-24AXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 44-LQFP
- Series:
- PSOC™1 CY8C26xxx
- Packaging:
- Bag
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- SPI, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 40
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.25V
- Data Converters:
- A/D 1x8b, 1x11b, 1x12b; D/A 1x9b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C26643-24AXI FAQ
1.How can I place an order for CY8C26643-24AXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C26643-24AXI 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 CY8C26643-24AXI reliable?
The price and inventory of CY8C26643-24AXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C26643-24AXI is usually 5 days.
3.What payment methods are accepted for CY8C26643-24AXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C26643-24AXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C26643-24AXI?
CY8C26643-24AXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C26643-24AXI 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 CY8C26643-24AXI?
For technical support, including CY8C26643-24AXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C26643-24AXI requirements.
6.How does Aetrix verify that CY8C26643-24AXI is sourced from the original manufacturer or authorized distributors?
All CY8C26643-24AXI 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 CY8C26643-24AXI meets industry standards.
7.What is the process for return or replacement of CY8C26643-24AXI?
All CY8C26643-24AXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C26643-24AXI, 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 CY8C26643-24AXI part is unused and in its original packaging.
Return procedure for CY8C26643-24AXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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