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Infineon Technologies CY8C27643-24LTXIT
- Part No.:
- CY8C27643-24LTXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C27643-24LTXIT.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,521
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Product details
Overview
CY8C27643-24LTXIT from Cypress Semiconductor is a PSoC® 1 programmable system-on-chip featuring an M8C 8-bit Harvard architecture CPU running at up to 24 MHz, 16 KB flash, 256 bytes SRAM, and configurable analog/digital blocks-including 12 analog and 8 digital PSoC blocks-for mixed-signal embedded control in industrial sensor interfaces and motor control subsystems.
For engineers reviewing the CY8C27643-24LTXIT datasheet, CY8C27643-24LTXIT pinout, CY8C27643-24LTXIT application, or CY8C27643-24LTXIT equivalent, key selection criteria include its 24 MHz max clock speed, 3.0–5.25 V operating voltage range, rail-to-rail analog block capability, 25-mA GPIO sink strength, and support for ISSP in-system programming.
Technical Context
The CY8C27643-24LTXIT integrates a 24 MHz internal main oscillator (±2.5% accuracy) with optional PLL doubling to 48 MHz, and supports external 32.768 kHz crystal for RTC or crystal-accurate 24 MHz clock generation. Its analog system delivers up to 14-bit ADC resolution and 9-bit DAC output via configurable switched-capacitor blocks.
Digital peripherals include two full-duplex UARTs, multiple SPI masters/slaves, I²C up to 400 kHz, 8–32-bit timers/counters, and PWMs with dead-band control-all routed flexibly across 44 GPIO pins via global digital/analog interconnects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 24 MHz max operation - enables deterministic real-time control with 4 MIPS throughput |
| Flash Memory | 16 KB program storage with 50,000 erase/write cycles - supports field firmware updates and IP protection via 64-byte block locking |
| SRAM | 256 bytes data memory - sufficient for small state machines and sensor buffer staging in ultra-low-footprint designs |
| Analog Blocks | 12 rail-to-rail configurable analog PSoC blocks - provide ADC (up to 14-bit), DAC (up to 9-bit), PGA, comparator, and filter functions without external components |
| Digital Blocks | 8 programmable digital PSoC blocks - combine to form 8–32-bit timers, PWMs, CRC/PRS modules, and dual UART/SPI peripherals |
| GPIO Drive | 25 mA sink / 10 mA source per pin, with pull-up/pull-down/high-Z/open-drain modes - directly drives LEDs, relays, and logic-level MOSFET gates |
| Operating Voltage | 3.0 V to 5.25 V, with on-chip SMP enabling 1.0 V operation - supports battery-powered and legacy 5 V industrial bus systems |
Pinout & Package
Package: 44-pin TQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, lead-free, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply input | Accepts 3.0–5.25 V; powers core, analog, and digital systems; requires local 0.1 µF decoupling |
| VSS | Ground reference | Digital and analog ground common point; must be low-impedance connection to PCB plane |
| XIN/XOUT | External crystal oscillator terminals | Supports 32.768 kHz crystal for RTC or high-accuracy 24 MHz clock via PLL; internal load caps enabled |
| P0[0]–P0[7] | Port 0 general-purpose I/O | Configurable as analog input (8 channels), digital I/O, or interrupt source; supports strong drive and open-drain |
| P1[0]–P1[7] | Port 1 general-purpose I/O | Includes four additional analog inputs (restricted routing); supports PWM output and UART TX/RX |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; compatible with pushbutton or supervisor IC assertion |
| SWD | Serial wire debug interface | 2-pin debug port for MiniProg3 programming and full-speed ICE emulation |
Key Features
| Feature | Design Value |
|---|---|
| In-system serial programming (ISSP) | Enables firmware updates over GPIO pins without dedicated programmer hardware - reduces production test complexity |
| Configurable analog blocks | Each of 12 analog blocks implements opamp-based circuits (e.g., PGA, comparator, filter) with user-defined gain, bandwidth, and topology |
| Global digital interconnect | Allows any digital block output to route to any GPIO pin - eliminates fixed peripheral pinout constraints in layout |
| On-chip switch mode pump (SMP) | Generates regulated 1.0 V core voltage from 3.0 V input - extends battery life in low-power sleep modes |
| User-configurable LVD | Programmable brown-out detection thresholds (1.62 V to 4.62 V in 0.3 V steps) - prevents erratic operation during supply sag |
Applications
| Industrial Sensor Interface | Motor Control Subsystem |
|---|---|
Use Scenario: Condition monitoring of temperature, pressure, and vibration sensors in PLC I/O modules. IC Role / Device Role / Timing Role: Mixed-signal signal conditioning, ADC digitization, and UART-based data aggregation to host controller. Use Value: Eliminates discrete opamps, ADCs, and level shifters; 14-bit ADC resolution captures sub-millivolt sensor drift. | Use Scenario: Closed-loop speed control of 24 V DC brush motors in HVAC actuators. IC Role / Device Role / Timing Role: PWM generation with dead-band control, current sensing via PGA/ADC, and fault reporting via GPIO. Use Value: 25 mA GPIO sink drives gate drivers directly; configurable timers synchronize PWM and current sampling windows. |
| Smart Lighting Controller | Capacitive Touch Interface |
Use Scenario: DALI-compliant LED driver with dimming profile storage and thermal derating logic. IC Role / Device Role / Timing Role: Digital control core managing DALI protocol stack, EEPROM-emulated parameter storage, and thermal ADC monitoring. Use Value: 16 KB flash stores multiple lighting profiles; 256-byte SRAM buffers DALI message frames without external RAM. | Use Scenario: Touch-button overlay for medical device front panels with ESD-hardened human interface. IC Role / Device Role / Timing Role: Capacitive sensing engine using switched-capacitor analog blocks and noise-immune correlation algorithms. Use Value: On-chip analog blocks implement CapSense® with no external RC components; 8-channel scan supports multi-button layouts. |
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 |
|---|---|---|---|
| CY8C27443-24LTXIT | Same core, 8 KB flash (vs. 16 KB), 128 bytes SRAM (vs. 256 B), identical analog/digital block count and pinout | Limited firmware footprint and data buffering - suitable for simpler sensor nodes without complex protocol stacks | Select when cost sensitivity outweighs need for large code space or dual UART operation |
| CY8C27543-24LTXIT | Same core, 12 KB flash, 192 bytes SRAM, identical peripheral set and package | Intermediate memory capacity - balances feature depth and BOM cost for mid-tier industrial controllers | Choose for designs requiring partial flash updates and moderate algorithm complexity without full 16 KB allocation |
Compared with CY8C27443-24LTXIT and CY8C27543-24LTXIT, the CY8C27643-24LTXIT provides maximum on-chip memory headroom for complex firmware, dual UART concurrency, and larger analog calibration tables - critical for field-upgradable industrial edge devices.
Availability
CY8C27643-24LTXIT is available at Aetrix Electronics and suitable for industrial sensor interfaces, motor control subsystems, smart lighting controllers, and capacitive touch interfaces requiring stable component supply across extended product lifecycles.
Supply support for CY8C27643-24LTXIT 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, connectivity, and memory technologies for industrial, automotive, and consumer markets.
The CY8C27xxx PSoC 1 family was designed to replace discrete analog/digital components with a single configurable chip for cost-sensitive, mixed-signal embedded control - emphasizing rapid prototyping via drag-and-drop peripheral configuration in PSoC Designer.
FAQ
Does CY8C27643-24LTXIT support USB communication?
No. The CY8C27643-24LTXIT does not include a USB physical layer or transceiver. It supports UART, SPI, and I²C for host communication. USB connectivity requires external bridge ICs such as CP2102 or FTDI chips, or migration to PSoC 3/4/5LP families with native USB support.
What development tools are required to program CY8C27643-24LTXIT?
Programming requires Cypress's discontinued but still supported PSoC Designer IDE (v5.4 SP4 or earlier), MiniProg1 or MiniProg3 programmer/debugger, and a compatible Windows host. No JTAG adapter is needed - ISSP uses standard GPIO pins (P1[0]–P1[3]) with SWD-compatible timing.
Can CY8C27643-24LTXIT operate below 3.0 V?
Yes. Using the on-chip switch mode pump (SMP), the device operates down to 1.0 V core voltage while supplied with ≥3.0 V on VDD. This enables ultra-low-power sleep modes with wake-on-GPIO or timer events, though analog block performance degrades below 2.7 V supply.
Is there hardware support for cryptographic operations?
No. The CY8C27643-24LTXIT lacks dedicated crypto accelerators or TRNG. Secure boot or AES encryption must be implemented in software using the M8C CPU and SRAM - limiting throughput and increasing vulnerability to side-channel attacks compared to modern secure MCUs.
CY8C27643-24LTXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- PSOC™1 CY8C27xxx
- 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:
- 44
- 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 4x14b; D/A 4x9b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C27643-24LTXIT FAQ
1.How can I place an order for CY8C27643-24LTXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C27643-24LTXIT 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 CY8C27643-24LTXIT reliable?
The price and inventory of CY8C27643-24LTXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C27643-24LTXIT is usually 5 days.
3.What payment methods are accepted for CY8C27643-24LTXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C27643-24LTXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C27643-24LTXIT?
CY8C27643-24LTXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C27643-24LTXIT 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 CY8C27643-24LTXIT?
For technical support, including CY8C27643-24LTXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C27643-24LTXIT requirements.
6.How does Aetrix verify that CY8C27643-24LTXIT is sourced from the original manufacturer or authorized distributors?
All CY8C27643-24LTXIT 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 CY8C27643-24LTXIT meets industry standards.
7.What is the process for return or replacement of CY8C27643-24LTXIT?
All CY8C27643-24LTXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C27643-24LTXIT, 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 CY8C27643-24LTXIT part is unused and in its original packaging.
Return procedure for CY8C27643-24LTXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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