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Infineon Technologies CY8C28643-24LTXI
- Part No.:
- CY8C28643-24LTXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C28643-24LTXI.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,855
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Product details
Overview
CY8C28643-24LTXI from Infineon Technologies (formerly Cypress Semiconductor) is a programmable System-on-Chip (PSoC® 1) featuring an M8C 8-bit Harvard architecture CPU running at up to 24 MHz, 16 KB flash, 1 KB SRAM, and reconfigurable analog/digital blocks. It supports 3.0–5.25 V operation, –40 °C to +85 °C industrial temperature range, and integrates up to 14-bit SAR ADCs, dual I²C, three full-duplex UARTs, and programmable GPIO with 25 mA sink capability - deployed in industrial sensor nodes and embedded control interfaces.
For engineers reviewing the CY8C28643-24LTXI datasheet, CY8C28643-24LTXI pinout, CY8C28643-24LTXI application, or CY8C28643-24LTXI equivalent, key selection criteria include verified 24 MHz M8C performance, rail-to-rail analog block configurability, ISSP-enabled in-system programming, GPIO interrupt-on-change support, and compatibility with PSoC Designer™ v5.x toolchain for mixed-signal system integration.
Technical Context
The CY8C28643-24LTXI implements a fixed-function M8C core with on-chip 24 MHz ±2.5% IMO and optional 32.768 kHz ECO for RTC/PLL-derived clocks. Its digital system uses up to 12 configurable 8-bit digital blocks interconnected via global buses, supporting composite peripherals like synchronized PWMs with dead-band, 32-bit timers, and multi-master I²C.
Analog functionality relies on up to 12 Type-2 analog blocks offering programmable gain amplifiers, comparators, 14-bit SAR ADCs (up to 142 ksps), delta-sigma ADCs, and capacitive sensing - all routed through dedicated analog interconnect and shared GPIO pins with 30 mA analog output drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 24 MHz max - enables deterministic real-time control with four MIPS throughput. |
| Memory | 16 KB flash (50k erase/write cycles), 1 KB SRAM - supports partial updates and EEPROM emulation for parameter storage. |
| Analog ADC | Up to 14-bit SAR ADC, 142 ksps with sample-and-hold - delivers high-resolution sensor digitization without external converters. |
| Digital Peripherals | Up to 3 full-duplex UARTs, 2 I²C masters/slaves, 6 half-duplex UARTs - enables multi-protocol communication in space-constrained designs. |
| GPIO Drive | 25 mA sink / 10 mA source per pin, 30 mA analog output - directly drives LEDs, relays, and analog transducers without buffer stages. |
| Operating Range | 3.0 V to 5.25 V supply, –40 °C to +85 °C - certified for industrial environments with no derating required. |
| Clock Sources | Internal 24 MHz IMO (±2.5%), 32.768 kHz ECO option, SMP for 1.5 V operation - ensures timing stability across voltage and temperature. |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | Accepts 3.0–5.25 V; powers digital core, analog blocks, and I/O drivers. |
| VSS | Digital ground reference | Primary return path for digital logic and clock distribution networks. |
| XIN/XOUT | External crystal oscillator terminals | Supports 32.768 kHz crystal for RTC or precision clock derivation via PLL. |
| P0[0]–P0[7] | Port 0 bidirectional GPIO | All pins support analog input, interrupt-on-change, and configurable drive modes (pull-up/down, open-drain). |
| SCL/SDA | I²C bus interface signals | Dedicated hardware I²C resources - operate up to 400 kHz in master/slave/multi-master mode. |
| TXD0/RXD0 | UART0 serial interface | Full-duplex asynchronous communication channel with programmable baud rate and parity. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | 12 Type-2 blocks enable on-the-fly synthesis of op-amps, filters, comparators, and 14-bit ADCs - eliminates need for discrete signal-conditioning ICs. |
| In-System Serial Programming | ISSP interface allows field firmware updates via two pins (SDA/SCL or dedicated pins) - supports secure, low-pin-count reprogramming without removing device. |
| Programmable GPIO Drive Modes | 8 configurable modes per pin including strong, open-drain, high-Z, and pull-up/pull-down - adapts to legacy bus standards (e.g., I²C, 1-Wire) and level-shifting requirements. |
| Switched Mode Pump (SMP) | On-chip DC-DC charge pump enables operation down to 1.5 V - extends battery life in portable industrial sensors without external regulators. |
| Dual Hardware I²C Resources | Two independent I²C controllers support concurrent master and slave roles - enables bridging between isolated subsystems (e.g., sensor hub ↔ host MCU). |
Applications
| Industrial Sensor Interface | Capacitive Touch Control Panel |
|---|---|
Use Scenario: Monitoring temperature, pressure, and humidity in factory-floor environmental stations using analog sensors and digital transducers. IC Role / Device Role / Timing Role: Central mixed-signal controller performing sensor signal acquisition, calibration, local decision-making, and RS-485/I²C data aggregation. Use Value: Integrates 14-bit ADC, programmable PGA, and I²C master in one die - reduces BOM count by 4 discrete components versus microcontroller + ADC + interface IC solution. | Use Scenario: Replacing mechanical buttons with touch-sensitive overlays on HMI panels for HVAC and building automation systems. IC Role / Device Role / Timing Role: Capacitive sensing engine with built-in CSD (CapSense®) algorithm execution and LED feedback PWM generation. Use Value: Uses dedicated Type-E analog blocks for dual-channel cap-sense with <10 µA active current - achieves >10-year battery life in wireless touch remotes. |
| Programmable Power Sequencer | Legacy Bus Protocol Bridge |
Use Scenario: Controlling startup/shutdown sequencing of multi-rail FPGA or ASIC power supplies in test equipment and medical imaging systems. IC Role / Device Role / Timing Role: Precision timing controller generating staggered enable signals with µs-level resolution and fault monitoring via analog voltage supervision. Use Value: Leverages 32-bit timers, analog comparators, and GPIO interrupt-on-change to replace discrete timers, op-amps, and logic gates - improves timing accuracy to ±0.5% over temperature. | Use Scenario: Translating Modbus RTU (RS-485) commands to I²C register writes for smart sensor clusters in IIoT gateways. IC Role / Device Role / Timing Role: Dual-protocol bridge executing protocol parsing, CRC validation, and address-mapped register access with zero external logic. Use Value: Combines UART (Modbus) and I²C (sensor) peripherals with SRAM-based command buffering - eliminates need for external microcontroller or FPGA in edge-node bridges. |
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 |
|---|---|---|---|
| CY8C28443-24LTXI | Same M8C core and package, but reduced analog block count (8 vs. 12) and no delta-sigma ADC support. | Suitable for cost-sensitive designs requiring only basic SAR ADC and GPIO control - lacks advanced filtering and multi-channel synchronous sampling. | Select when analog resource demand is ≤8 blocks and delta-sigma functionality is unnecessary. |
| CY8C29466-24LFXI | Higher-resource PSoC 1 variant with 24 KB flash, 2 KB SRAM, and 16 analog blocks - same 48-pin QFN footprint. | Enables larger firmware images and more complex analog signal chains (e.g., multi-channel sensor fusion), but increases unit cost and power draw. | Choose when firmware size exceeds 16 KB or ≥14-bit ADC channels exceed four simultaneously active inputs. |
Compared with CY8C28443-24LTXI and CY8C29466-24LFXI, the CY8C28643-24LTXI balances analog flexibility (12 Type-2 blocks, delta-sigma support) and code density (16 KB flash), making it optimal for mid-complexity industrial control where resource scalability matters more than raw capacity or minimal cost.
Availability
CY8C28643-24LTXI is available at Aetrix Electronics and suitable for industrial sensor interfaces, capacitive touch HMIs, programmable power sequencers, and legacy bus protocol bridges requiring stable component supply across extended product lifecycles.
Supply support for CY8C28643-24LTXI 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
Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive MCUs, and secure connectivity solutions.
This device belongs to the PSoC® 1 family - Infineon's first-generation programmable mixed-signal SoC platform designed for rapid prototyping and integration of analog, digital, and memory functions into single-chip industrial and consumer control systems.
FAQ
What development tools are required to program the CY8C28643-24LTXI?
PSoC Designer™ v5.4 is the official IDE for this device, providing drag-and-drop peripheral configuration, automatic API generation, and full-speed emulation via MiniProg3. The software includes device-specific libraries for CapSense®, I²C, UART, and ADC modules, and supports ISSP programming through standard headers or SWD-compatible debug probes.
Does the CY8C28643-24LTXI support true hardware I²C multi-master operation?
Yes - it integrates two independent hardware I²C controllers, each capable of full multi-master arbitration, clock stretching, and 7-/10-bit addressing per SMBus 2.0 specification. Both controllers operate concurrently at up to 400 kHz and share no internal bus contention, enabling robust peer-to-peer communication in distributed sensor networks.
Can the internal 24 MHz oscillator meet timing-critical real-time control requirements?
The internal main oscillator (IMO) is specified at ±2.5% accuracy over –40 °C to +85 °C and full voltage range, making it suitable for non-RTC applications such as motor control PWM generation, UART baud rate derivation, and sensor sampling triggers where absolute timekeeping is not required.
How is flash endurance managed during frequent firmware updates in the field?
The 16 KB flash supports 50,000 erase/write cycles per sector, and PSoC Designer enables partial updates targeting only modified pages. Combined with EEPROM emulation routines in the provided library, critical parameters (e.g., calibration coefficients) can be stored in protected flash regions with wear-leveling - extending effective lifetime beyond 10 years under typical update profiles.
CY8C28643-24LTXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- PSOC™1 CY8C28xxx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, IrDA, SPI, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 44
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K 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:
CY8C28643-24LTXI FAQ
1.How can I place an order for CY8C28643-24LTXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C28643-24LTXI 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 CY8C28643-24LTXI reliable?
The price and inventory of CY8C28643-24LTXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C28643-24LTXI is usually 5 days.
3.What payment methods are accepted for CY8C28643-24LTXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C28643-24LTXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C28643-24LTXI?
CY8C28643-24LTXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C28643-24LTXI 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 CY8C28643-24LTXI?
For technical support, including CY8C28643-24LTXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C28643-24LTXI requirements.
6.How does Aetrix verify that CY8C28643-24LTXI is sourced from the original manufacturer or authorized distributors?
All CY8C28643-24LTXI 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 CY8C28643-24LTXI meets industry standards.
7.What is the process for return or replacement of CY8C28643-24LTXI?
All CY8C28643-24LTXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C28643-24LTXI, 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 CY8C28643-24LTXI part is unused and in its original packaging.
Return procedure for CY8C28643-24LTXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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