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Infineon Technologies CY8C28645-24LTXIT
- Part No.:
- CY8C28645-24LTXIT
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C28645-24LTXIT.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,578
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Product details
Overview
CY8C28645-24LTXIT 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 for mixed-signal embedded control. It operates from 3.0 V to 5.25 V (or down to 1.5 V with on-chip switched-mode pump), supports industrial temperature range (–40 °C to +85 °C), and integrates dual I²C, up to three full-duplex UARTs, and configurable GPIOs - used in sensor interface and motor control subsystems.
For engineers reviewing the CY8C28645-24LTXIT datasheet, CY8C28645-24LTXIT pinout, CY8C28645-24LTXIT application, or CY8C28645-24LTXIT equivalent, key selection criteria include its 24 MHz M8C core speed, 14-bit SAR ADC capability (up to 142 ksps), 12 digital PSoC blocks, 16 analog PSoC blocks, and support for in-system serial programming (ISSP™) with partial flash updates.
Technical Context
This PSoC 1 device implements a fixed-function M8C CPU core with dedicated instruction and data buses, enabling deterministic real-time execution. Its digital system uses up to 12 8-bit configurable digital blocks that can be combined into 8–32-bit peripherals including PWMs, timers, UARTs, SPI, and CRC modules - all routable to any GPIO via global interconnect.
The analog system comprises up to 16 programmable analog blocks: 12 Type-2 blocks supporting 14-bit SAR ADCs, 9-bit DACs, PGAs, and filters; plus four limited-type E blocks for capacitive sensing and 10-bit ADCs. Clocking includes ±2.5% accurate 24/48 MHz IMO, 32.768 kHz ECO option, and low-power ILO for sleep/wake timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 24 MHz max clock - enables deterministic real-time control without cache or pipeline stalls. |
| Flash Memory | 16 KB program flash with 50,000 erase/write cycles - supports field firmware updates and EEPROM emulation. |
| SRAM | 1 KB on-chip SRAM - sufficient for stack, variables, and small buffers in resource-constrained embedded applications. |
| Analog Blocks | Up to 16 total (12 Type-2 + 4 Type-E) - enables concurrent high-resolution ADC, DAC, PGA, and CapSense functions on one die. |
| Digital Blocks | Up to 12 configurable 8-bit digital blocks - combinable into 8–32-bit timers, PWMs, UARTs, SPI, and I²C peripherals. |
| Operating Voltage | 3.0 V to 5.25 V nominal; down to 1.5 V with internal switched-mode pump - supports battery-backed or wide-input industrial rails. |
| Temperature Range | –40 °C to +85 °C industrial grade - validated for use in automotive body electronics and industrial PLC I/O modules. |
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 | 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 | System common return; must be connected to PCB ground plane with low-inductance path. |
| XIN / XOUT | External crystal oscillator terminals | Supports 32.768 kHz crystal for RTC or precision clock generation; internal load caps enabled. |
| P0[0]–P0[7] | Port 0 bidirectional GPIO | Configurable drive modes (pull-up/down, open-drain, strong); all support analog input and interrupt-on-change. |
| SCL / SDA | I²C bus interface pins | Dedicated hardware I²C resources; support master/slave/multi-master modes up to 400 kHz. |
| TXD0 / RXD0 | UART0 serial interface | Full-duplex asynchronous communication; routed to digital block DBC00/DBC01; supports parity and framing. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | 12 Type-2 blocks deliver 14-bit SAR ADC (142 ksps), 9-bit DAC, and programmable gain amplifiers - eliminating need for external signal conditioning ICs. |
| Flexible Digital Peripherals | 12 digital blocks combine into timers, PWMs, UARTs, SPI, and CRC - enabling custom protocol stacks or motor control waveforms without external logic. |
| In-System Serial Programming | ISSP™ interface allows firmware updates via two pins (SDA/SCL or dedicated pins) - simplifies field maintenance and reduces BOM count. |
| Programmable GPIO Drive | 25 mA sink / 10 mA source per pin, with 8 drive modes - directly interfaces LEDs, relays, and sensors without external buffers. |
| Low-Voltage Operation | On-chip switched-mode pump enables operation down to 1.5 V - extends battery life in portable instrumentation and remote sensors. |
Applications
| Industrial Sensor Node | Motor Control Interface |
|---|---|
Use Scenario: Standalone environmental monitoring node with temperature, humidity, and pressure sensors feeding data to a gateway via I²C and UART. IC Role / Device Role / Timing Role: Central mixed-signal controller performing analog sensor acquisition (via 14-bit SAR ADC), digital signal processing, and protocol translation. Use Value: Integrates ADC, DAC, PGA, and UART in one chip - reduces component count by ≥4 discrete ICs and eliminates external reference calibration. | Use Scenario: Brushless DC motor commutation module with Hall-effect feedback, current sensing, and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time motor controller generating synchronized 16-bit PWMs with dead-band, reading analog current feedback, and managing fault interrupts. Use Value: Configurable digital blocks generate precise, phase-aligned PWMs; analog blocks condition current sense signals - avoids separate MCU + analog front-end design. |
| Capacitive Touch Panel | Legacy Protocol Bridge |
Use Scenario: Human-machine interface for medical device with multi-button capacitive touch overlay and LED status indicators. IC Role / Device Role / Timing Role: Capacitive sensing engine using Type-E analog blocks, coupled with GPIO-driven LED control and UART-based host reporting. Use Value: Native CapSense support with noise-immune scanning - achieves >100:1 signal-to-noise ratio without external RC networks or shield layers. | Use Scenario: Industrial fieldbus adapter converting Modbus RTU (RS-485) to I²C for legacy sensor integration into modern controllers. IC Role / Device Role / Timing Role: Protocol translator implementing UART-to-I²C bridging with configurable baud rates, parity, and packet framing. Use Value: Dual hardware I²C + multiple UARTs enable simultaneous master/slave operation - eliminates need for external level shifters or protocol ASICs. |
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 |
|---|---|---|---|
| CY8C28445-24LTXIT | Fewer analog blocks (8 vs. 16), no Type-E CapSense support, same M8C core and memory | Limited to simpler analog acquisition; unsuitable for multi-channel CapSense or high-resolution sensor fusion | Select when cost sensitivity outweighs analog channel count and CapSense requirements |
| CY8C29466-24LFXIT | Higher flash (32 KB), larger SRAM (2 KB), additional digital blocks (16 vs. 12), same package | Better suited for complex state machines or firmware with large lookup tables; higher power consumption in active mode | Select when firmware complexity or data buffering exceeds CY8C28645 capacity |
Compared with CY8C28445-24LTXIT and CY8C29466-24LFXIT, the CY8C28645-24LTXIT delivers balanced analog/digital resource allocation - optimal for designs requiring both high-resolution ADC and CapSense without over-provisioning flash or digital logic.
Availability
CY8C28645-24LTXIT is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, capacitive touch panels, and legacy protocol bridges requiring stable component supply across extended product lifecycles.
Supply support for CY8C28645-24LTXIT 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 acquired Cypress Semiconductor in 2020 and maintains full product continuity, technical support, and long-term supply commitment for the PSoC® portfolio.
The CY8C28xxx series belongs to the PSoC® 1 family - designed specifically for cost-sensitive, low-power embedded control applications requiring integrated analog signal conditioning, programmable digital peripherals, and rapid system-level customization without ASIC development.
FAQ
Does CY8C28645-24LTXIT support USB connectivity?
No. The CY8C28645-24LTXIT does not include a USB physical layer or USB controller. It supports UART, SPI, and I²C for host communication. For USB-capable PSoC devices, consider the PSoC 3 or PSoC 4 families, which integrate dedicated USB 2.0 Full-Speed controllers with on-chip transceivers and descriptor handling.
What development tools are required to program CY8C28645-24LTXIT?
PSoC Designer™ (free Windows IDE) is the official development environment, paired with MiniProg1 or MiniProg3 programmers. The tool provides drag-and-drop peripheral configuration, automatic API generation, ISSP™ programming, and full-speed in-circuit emulation with 128 KB trace memory - no third-party toolchain licensing is needed.
Can CY8C28645-24LTXIT operate from a single 1.8 V supply?
No. The device requires minimum 3.0 V for standard operation. However, it can operate down to 1.5 V using the internal switched-mode pump (SMP) to boost core voltage - this mode is explicitly supported in the datasheet and validated across the industrial temperature range with appropriate external capacitor filtering.
Is there hardware support for floating-point arithmetic on the M8C core?
No. The M8C CPU lacks native floating-point instructions or hardware accelerator. All floating-point operations must be performed in software using library routines (e.g., IEEE 754 single-precision emulation). For applications requiring frequent FP math, fixed-point scaling or migration to PSoC 4 (ARM Cortex-M0) is recommended.
CY8C28645-24LTXIT 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:
CY8C28645-24LTXIT FAQ
1.How can I place an order for CY8C28645-24LTXIT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C28645-24LTXIT 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 CY8C28645-24LTXIT reliable?
The price and inventory of CY8C28645-24LTXIT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C28645-24LTXIT is usually 5 days.
3.What payment methods are accepted for CY8C28645-24LTXIT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C28645-24LTXIT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C28645-24LTXIT?
CY8C28645-24LTXIT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C28645-24LTXIT 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 CY8C28645-24LTXIT?
For technical support, including CY8C28645-24LTXIT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C28645-24LTXIT requirements.
6.How does Aetrix verify that CY8C28645-24LTXIT is sourced from the original manufacturer or authorized distributors?
All CY8C28645-24LTXIT 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 CY8C28645-24LTXIT meets industry standards.
7.What is the process for return or replacement of CY8C28645-24LTXIT?
All CY8C28645-24LTXIT units undergo pre-shipment inspection (PSI). If there is an issue with CY8C28645-24LTXIT, 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 CY8C28645-24LTXIT part is unused and in its original packaging.
Return procedure for CY8C28645-24LTXIT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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