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Infineon Technologies CY8C28643-24LTXIT
- Part No.:
- CY8C28643-24LTXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C28643-24LTXIT.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,631
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Product details
Overview
CY8C28643-24LTXIT 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, industrial temperature range (–40 °C to +85 °C), and integrates up to 12 digital and 16 analog PSoC blocks for mixed-signal embedded control in sensor interface, motor control, and industrial automation systems.
For engineers reviewing the CY8C28643-24LTXIT datasheet, CY8C28643-24LTXIT pinout, CY8C28643-24LTXIT application, or CY8C28643-24LTXIT equivalent, key selection criteria include its 24 MHz M8C core speed, on-chip switched-mode pump enabling 1.5 V operation, configurable GPIO drive modes (25 mA sink/10 mA source), dual I²C resources (0–400 kHz), and support for SAR ADC (up to 142 ksps) and delta-sigma ADCs.
Technical Context
This PSoC 1 device implements a fixed-function M8C CPU core with dedicated instruction and data buses, paired with a globally routable interconnect fabric linking digital blocks (timers, PWMs, UARTs, SPI, I²C) and analog blocks (ADCs, DACs, PGAs, comparators). Clocking includes a ±2.5% internal 24 MHz IMO, 32.768 kHz ECO option for RTC, and low-power ILO for sleep/wake.
Analog subsystem flexibility derives from two decimator types: Type 2 analog blocks support SAR ADCs with sample-and-hold and programmable gain amplifiers, while limited-type E blocks enable capacitive sensing and 10-bit single-slope ADCs. Digital block composition allows user-defined peripherals such as multi-phase PWMs with dead-band or synchronized counter arrays.
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 |
| Flash / SRAM | 16 KB flash (50k erase/write cycles), 1 KB SRAM - supports field-upgradable firmware and runtime data buffering |
| Operating Voltage | 3.0 V to 5.25 V; down to 1.5 V with on-chip SMP - allows direct battery operation (e.g., 2×AA) without external regulators |
| Analog Blocks | Up to 16 total: 12 Type 2 (SAR/delta-sigma ADC, PGA, comparator) + 4 Type E (CapSense, 10-bit ADC) - enables simultaneous sensor acquisition and touch interface |
| Digital Peripherals | Up to 3 full-duplex UARTs, 6 half-duplex UARTs, 2 I²C masters/slaves, variable-length SPI - supports multi-protocol industrial communication stacks |
| GPIO Drive | 25 mA sink / 10 mA source per pin, 8 configurable drive modes - eliminates need for external level-shifting or buffer ICs in actuator interfaces |
| Temperature Range | –40 °C to +85 °C - qualified for industrial control cabinet and outdoor metering environments |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, thermally enhanced with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | Accepts 3.0–5.25 V; powers core, digital, and analog domains; requires local 100 nF bypass |
| VSS | Digital ground reference | Primary return path for digital logic and I/O; must be connected to thermal pad for thermal performance |
| XTAL_IN / XTAL_OUT | 32.768 kHz crystal oscillator terminals | Enable precision RTC timing; require 12.5 pF load capacitance crystal for stable 32.768 kHz operation |
| P0[0]–P0[7] | Port 0 general-purpose I/O | Support analog input, CapSense, interrupt-on-change, and 25 mA sink - used for front-panel buttons and LED drivers |
| SCL / SDA | I²C bus interface pins | Shared across both I²C resources; support open-drain configuration and 400 kHz fast-mode operation |
| TXD0 / RXD0 | UART0 serial interface | Full-duplex TTL-level UART; routed to global digital interconnect - used for debug console or host MCU communication |
Key Features
| Feature | Design Value |
|---|---|
| In-system serial programming (ISSP) | Enables firmware updates via 5-pin interface without removing device from PCB - reduces field service cost and downtime |
| Configurable GPIO drive modes | 8 modes including strong, open-drain, pull-up/down, high-Z - simplifies interface to diverse loads (relays, LEDs, sensors) without external components |
| On-chip switched-mode pump (SMP) | Generates regulated 1.5 V from 3.3 V supply - extends battery life in portable instrumentation by enabling ultra-low-voltage operation |
| EEPROM emulation in flash | Uses flash wear-leveling algorithms to provide nonvolatile parameter storage - avoids external EEPROM in calibration-critical applications like sensor transmitters |
| Global digital/analog interconnect | Routing matrix connects any peripheral output to any GPIO or internal resource - eliminates fixed-function pin constraints during layout |
Applications
| Industrial Sensor Node | Motor Control Interface |
|---|---|
Use Scenario: Compact environmental monitoring unit measuring temperature, humidity, and CO₂ using analog and digital sensors. IC Role / Device Role / Timing Role: Central PSoC controller acquiring analog sensor signals via SAR ADC, processing data, and transmitting over I²C to gateway MCU. Use Value: Integrated analog blocks eliminate external signal-conditioning ICs; 24 MHz CPU handles real-time filtering and CRC checksum generation. | Use Scenario: Brushless DC motor driver board requiring commutation timing, current sensing, and fault reporting. IC Role / Device Role / Timing Role: Real-time motor controller generating synchronized PWMs with dead-band, reading shunt voltage via delta-sigma ADC, and signaling faults over UART. Use Value: Configurable digital blocks generate precise 3-phase PWM waveforms; analog decimators resolve current feedback at 142 ksps with <1 LSB noise. |
| Capacitive Touch Panel | Programmable Power Sequencer |
Use Scenario: Appliance control panel with slider, buttons, and proximity wake-up using self- and mutual-capacitance sensing. IC Role / Device Role / Timing Role: Dedicated CapSense engine in Type E analog blocks scanning 12 electrodes at 100 Hz while managing low-power sleep states. Use Value: On-chip CapSense hardware offloads CPU; 25 mA GPIO sink drives status LEDs directly without external drivers. | Use Scenario: FPGA or ASIC power management system sequencing 4 voltage rails with monitoring and sequencing delays. IC Role / Device Role / Timing Role: Programmable sequencer using timers and GPIOs to assert EN signals with millisecond-accurate delays and monitor PGOOD feedback. Use Value: Flash-based firmware allows field-adjustable timing parameters; I²C interface enables dynamic reconfiguration by host processor. |
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 |
|---|---|---|---|
| CY8C28443-24LTXIT | Fewer analog blocks (12 vs. 16), no Type E CapSense blocks, same CPU and memory | Lacks integrated capacitive sensing; suitable only for pure analog acquisition or digital control | Select when CapSense or dual delta-sigma ADCs are not required - lower cost for simpler sensor nodes |
| CY8C29466-24LFXIT | Higher flash (32 KB), additional digital blocks (16 vs. 12), same analog count and clock specs | Supports larger firmware images and more complex peripheral combinations (e.g., dual UART + dual SPI + I²C) | Select when firmware size exceeds 16 KB or concurrent multi-protocol communication is needed |
Compared with CY8C28443-24LTXIT and CY8C29466-24LFXIT, the CY8C28643-24LTXIT delivers optimal balance of analog capability (16 blocks, CapSense support) and code space (16 KB) for mid-complexity industrial controllers where sensor integration and GPIO flexibility are critical.
Availability
CY8C28643-24LTXIT is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, capacitive touch panels, and programmable power sequencers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for CY8C28643-24LTXIT 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
Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power management, automotive MCUs, and secure connectivity solutions.
The CY8C28xxx PSoC 1 family was originally developed by Cypress Semiconductor and continues under Infineon's portfolio to serve cost-sensitive, mixed-signal embedded applications demanding reconfigurable analog/digital peripherals and field-programmable logic in compact industrial and consumer systems.
FAQ
What development tools are required to program the CY8C28643-24LTXIT?
PSoC Designer™ (free Windows IDE) is the official development environment, providing drag-and-drop peripheral configuration, automatic API generation, and full-speed emulation. Programming requires MiniProg1 or MiniProg3 hardware programmers. No third-party toolchain is supported - all compilation, debugging, and ISSP are handled exclusively within PSoC Designer.
Does the CY8C28643-24LTXIT support USB connectivity?
No, the CY8C28643-24LTXIT does not include native USB PHY or USB controller hardware. It supports UART, SPI, and I²C for host communication. For USB-to-UART bridge functionality, external ICs such as CP2102 or FT232RL must be used - the PSoC can manage the bridged protocol stack but cannot enumerate as a USB device.
Can the internal 24 MHz oscillator meet timing-critical UART baud rates?
Yes, the ±2.5% accuracy of the internal main oscillator (IMO) supports standard UART baud rates (e.g., 9600, 19200, 115200) with less than 1.5% error at 24 MHz, well within the ±3% tolerance limit for asynchronous serial communication. For higher precision (e.g., 1 Mbps), use the 32.768 kHz ECO with PLL to derive exact system clocks.
How is analog ground separation handled on this 48-pin QFN package?
The CY8C28643-24LTXIT uses a single VSS pin shared for digital and analog ground, but recommends split-plane PCB layout: separate analog and digital ground pours connected at a single point near the VSS pin and thermal pad. The internal analog reference circuitry is isolated via dedicated routing, and decoupling (100 nF ceramic + 10 µF tantalum) must be placed adjacent to VDD/VSS pins to minimize noise coupling.
CY8C28643-24LTXIT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 48-VFQFN Exposed Pad
- Series:
- PSOC™1 CY8C28xxx
- Packaging:
- Tape & Reel (TR)
- 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:
CY8C28643-24LTXIT FAQ
1.How can I place an order for CY8C28643-24LTXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C28643-24LTXIT 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 CY8C28643-24LTXIT reliable?
The price and inventory of CY8C28643-24LTXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C28643-24LTXIT is usually 5 days.
3.What payment methods are accepted for CY8C28643-24LTXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C28643-24LTXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C28643-24LTXIT?
CY8C28643-24LTXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C28643-24LTXIT 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 CY8C28643-24LTXIT?
For technical support, including CY8C28643-24LTXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C28643-24LTXIT requirements.
6.How does Aetrix verify that CY8C28643-24LTXIT is sourced from the original manufacturer or authorized distributors?
All CY8C28643-24LTXIT 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 CY8C28643-24LTXIT meets industry standards.
7.What is the process for return or replacement of CY8C28643-24LTXIT?
All CY8C28643-24LTXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C28643-24LTXIT, 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 CY8C28643-24LTXIT part is unused and in its original packaging.
Return procedure for CY8C28643-24LTXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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