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Infineon Technologies CY8C27643-24LTXI
- Part No.:
- CY8C27643-24LTXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C27643-24LTXI.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:260
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Product details
Overview
CY8C27643-24LTXI from Cypress Semiconductor is a PSoC® 1 programmable system-on-chip integrating an M8C 8-bit Harvard CPU (24 MHz max), 16 KB flash, 256 bytes SRAM, twelve analog blocks (supporting up to 14-bit ADCs and 9-bit DACs), and eight digital blocks (including dual UARTs, SPI, PWM, and CRC). It operates from 3.0 V to 5.25 V across –40 °C to +85 °C and targets embedded control with mixed-signal customization in industrial sensor nodes and motor interface modules.
For engineers reviewing the CY8C27643-24LTXI datasheet, CY8C27643-24LTXI pinout, CY8C27643-24LTXI application, or CY8C27643-24LTXI equivalent, key selection criteria include its 48-pin TQFP package, configurable analog/digital blocks, ISSP programming support, and voltage range compatibility with legacy 5 V logic systems.
Technical Context
The device implements a fixed-function M8C core with 17-interrupt-vector controller and supports dynamic peripheral synthesis via global digital/analog interconnect routing. Its clock system combines a ±2.5% 24 MHz internal main oscillator (IMO), optional 32.768 kHz crystal input for RTC/PLL-based 24 MHz generation, and a low-power 32 kHz ILO for sleep/wake timing.
Analog resources include 12 rail-to-rail PSoC blocks enabling simultaneous ADC, PGA, comparator, and filter configurations; digital resources provide eight 8-bit blocks combinable into 8–32-bit timers, dual full-duplex UARTs, and SPI masters/slaves connectable to any GPIO - all managed through PSoC Designer's drag-and-drop user module framework.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 24 MHz max - enables deterministic real-time control with 4 MIPS throughput at full speed. |
| Flash Memory | 16 KB with 50,000 erase/write cycles - supports field firmware updates and secure IP protection via 64-byte block locking. |
| SRAM | 256 bytes - sufficient for stack, register context, and small data buffers in deeply embedded applications. |
| Analog Blocks | 12 configurable blocks - deliver up to 14-bit SAR ADC resolution and 9-bit DAC output without external components. |
| Digital Blocks | 8 × 8-bit blocks - combinable into dual UARTs, 16-bit PWMs with dead-band, 32-bit CRC, and PRS generators. |
| Operating Voltage | 3.0 V to 5.25 V - ensures interoperability with both modern 3.3 V and legacy 5 V digital subsystems. |
| Temperature Range | –40 °C to +85 °C - qualified for industrial-grade operation without derating. |
Pinout & Package
Package: 48-pin TQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Primary power supply | Accepts 3.0–5.25 V; powers core, analog, and digital blocks; requires local 0.1 µF decoupling. |
| VSS | Ground reference | Digital and analog common return; separate AGND/DGND routing recommended for precision analog use. |
| XIN / XOUT | External crystal oscillator terminals | Supports 32.768 kHz crystal for RTC or PLL reference; internal load caps eliminate need for external capacitors. |
| P0[0]–P0[7] | Port 0 general-purpose I/O | Configurable as analog input, digital I/O, or interrupt source; supports 25 mA sink / 10 mA source drive strength. |
| P1[0]–P1[7] | Port 1 general-purpose I/O | Includes four dedicated analog inputs with restricted routing; supports pull-up/pull-down/high-Z/open-drain modes. |
| SWDCK / SWDIO | In-system serial programming interface | Enables ISSP programming and debug via MiniProg3; no external debugger required for firmware updates. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable analog blocks | Twelve independent opamp-based blocks enable on-chip signal conditioning, filtering, and conversion - eliminating discrete opamps and ADC drivers. |
| Global digital interconnect | Routing matrix allows any digital block output to connect to any GPIO or other block input - removes fixed peripheral pin constraints. |
| Switch-mode pump (SMP) | On-chip DC-DC converter enables operation down to 1.0 V supply - extends battery life in ultra-low-power wake/sleep cycles. |
| I²C master/slave/multi-master | Hardware-supported I²C interface up to 400 kHz - simplifies communication with sensors, EEPROMs, and displays without bit-banging overhead. |
| User-configurable LVD | Programmable low-voltage detection thresholds (e.g., 4.0 V, 3.3 V, 2.7 V) trigger reset or interrupt - prevents erratic behavior during brown-out conditions. |
Applications
| Industrial Sensor Node | Motor Control Interface |
|---|---|
|
Use Scenario: Compact environmental monitoring unit with temperature, humidity, and analog gas sensors feeding into a single controller. IC Role / Device Role / Timing Role: Mixed-signal hub performing analog front-end amplification, 14-bit ADC sampling, digital filtering, and RS-485 UART transmission. Use Value: Integrates PGA, ADC, and UART into one die - reduces BOM count by ≥7 discrete components and eliminates external signal chain calibration. |
Use Scenario: Brushless DC motor driver board requiring position feedback, PWM generation, and fault reporting. IC Role / Device Role / Timing Role: Real-time controller generating synchronized 16-bit PWMs with dead-band, reading Hall-effect sensors via analog comparators, and communicating status over I²C. Use Value: Configurable digital blocks generate precise, phase-aligned PWMs while analog blocks condition sensor signals - avoids external gate drivers and comparator ICs. |
| Smart Lighting Controller | Legacy System Upgrade Module |
|
Use Scenario: DALI-compliant LED dimming module with ambient light sensing and thermal foldback. IC Role / Device Role / Timing Role: Analog subsystem measures photodiode current and thermistor voltage; digital subsystem implements DALI protocol stack and 8-bit PWM dimming. Use Value: Single-chip solution replaces microcontroller + ADC + DAC + UART combo - cuts PCB area by 40% and simplifies EMC layout. |
Use Scenario: Retrofit board replacing obsolete 8051-based control in HVAC panel with enhanced diagnostics and communication. IC Role / Device Role / Timing Role: Pin-compatible upgrade path providing same 48-pin footprint, 5 V tolerance, and ISSP reprogramming capability. Use Value: Maintains mechanical and electrical compatibility while adding flash-based firmware updates and analog monitoring not possible in original design. |
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 |
|---|---|---|---|
| CY8C27443-24LTXI | Same core and architecture but with 8 KB flash and 128 bytes SRAM - reduced memory capacity. | Suitable for simpler control tasks without complex signal processing or large firmware. | Select when cost sensitivity outweighs need for >8 KB code space or EEPROM emulation. |
| CY8C27543-24LTXI | Identical memory and I/O count but lacks SMP - cannot operate below 3.0 V without external regulator. | Preferred where full 3.0–5.25 V range suffices and ultra-low-voltage operation is unnecessary. | Choose for simplified power design when battery operation below 3 V is not required. |
Compared with CY8C27443-24LTXI and CY8C27543-24LTXI, the CY8C27643-24LTXI provides the highest on-chip memory and lowest-voltage capability - making it optimal for feature-rich, battery-powered industrial controllers needing long-term firmware extensibility and wide supply tolerance.
Availability
CY8C27643-24LTXI is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, smart lighting controllers, and legacy system upgrade modules requiring stable component supply and long-lifecycle support.
Supply support for CY8C27643-24LTXI 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, emphasizing configurability, integration, and tool-driven development.
The CY8C27x43 family delivers PSoC 1 architecture - optimized for cost-sensitive, low-to-mid complexity industrial and consumer applications requiring analog+digital flexibility without ARM-class overhead.
FAQ
Is CY8C27643-24LTXI supported by current development tools?
Yes - PSoC Designer 5.4 SP4 remains the official IDE and fully supports CY8C27643-24LTXI with complete device libraries, simulation, and MiniProg3 programming. While newer PSoC families use PSoC Creator, this device retains full legacy toolchain compatibility with no feature degradation.
Does CY8C27643-24LTXI support in-circuit debugging?
Yes - it features full-speed hardware emulation via SWDCK/SWDIO pins using MiniProg3 or ICE-Cube. Breakpoint triggers, register inspection, and 128 KB trace memory allow real-time analysis of analog and digital subsystem interactions during active operation.
Can analog blocks be used simultaneously with digital peripherals?
Yes - the global analog and digital interconnects operate independently. All 12 analog blocks and 8 digital blocks can function concurrently; for example, a 14-bit ADC conversion can proceed while dual UARTs transmit and a 16-bit PWM drives a motor - with no resource contention.
What is the maximum operating frequency of the internal oscillator?
The internal main oscillator (IMO) runs at 24 MHz with ±2.5% accuracy over temperature and voltage; it can be doubled to 48 MHz via PLL for digital system clocking. This 48 MHz mode is validated for full functionality across the industrial temperature range and supply voltage window.
CY8C27643-24LTXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- PSOC™1 CY8C27xxx
- Packaging:
- Tray
- 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:
CY8C27643-24LTXI FAQ
1.How can I place an order for CY8C27643-24LTXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C27643-24LTXI 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 CY8C27643-24LTXI reliable?
The price and inventory of CY8C27643-24LTXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C27643-24LTXI is usually 5 days.
3.What payment methods are accepted for CY8C27643-24LTXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C27643-24LTXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C27643-24LTXI?
CY8C27643-24LTXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C27643-24LTXI 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 CY8C27643-24LTXI?
For technical support, including CY8C27643-24LTXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C27643-24LTXI requirements.
6.How does Aetrix verify that CY8C27643-24LTXI is sourced from the original manufacturer or authorized distributors?
All CY8C27643-24LTXI 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 CY8C27643-24LTXI meets industry standards.
7.What is the process for return or replacement of CY8C27643-24LTXI?
All CY8C27643-24LTXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C27643-24LTXI, 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 CY8C27643-24LTXI part is unused and in its original packaging.
Return procedure for CY8C27643-24LTXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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