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Infineon Technologies CY8C28645-24LTXI
- Part No.:
- CY8C28645-24LTXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
CY8C28645-24LTXI.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,450
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Product details
Overview
CY8C28645-24LTXI from Infineon Technologies (formerly Cypress Semiconductor) is a programmable System-on-Chip (PSoC® 1) integrating an M8C 8-bit Harvard-architecture CPU, 16 KB flash, 1 KB SRAM, up to 12 digital PSoC blocks, and up to 16 analog PSoC blocks - all operating at up to 24 MHz with 3.0–5.25 V supply. It supports capacitive sensing, 14-bit SAR ADCs (up to 142 ksps), dual I²C, and configurable GPIOs for embedded control in industrial HMI and sensor interface systems.
For engineers reviewing the CY8C28645-24LTXI datasheet, CY8C28645-24LTXI pinout, CY8C28645-24LTXI application, or CY8C28645-24LTXI equivalent, key selection criteria include its 24 MHz M8C core speed, rail-to-rail analog block flexibility, 25 mA sink capability per GPIO, integrated switched-mode pump for 1.5 V operation, and support for partial flash updates via ISSP™.
Technical Context
The CY8C28645-24LTXI implements a fixed-function M8C CPU core with Harvard architecture, executing instructions from on-chip flash while accessing data in SRAM. Its digital system uses up to 12 reconfigurable 8-bit digital blocks connected via global interconnects to support UARTs (3 full-duplex/6 half-duplex), SPI, PWMs, timers, and CRC modules.
Analog functionality is delivered through up to 16 programmable analog blocks - including dedicated SAR ADCs with sample-and-hold, delta-sigma ADCs, PGAs, comparators, and capacitive sensing engines - all routed through global analog interconnects and configurable to share references, clocks, and inputs across ports.
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 pipeline stalls. |
| Flash Memory | 16 KB program storage with 50,000 erase/write cycles - supports field firmware updates and EEPROM emulation. |
| SRAM | 1 KB on-chip data memory - sufficient for stack, variables, and small buffers in low-footprint embedded applications. |
| Analog Blocks | Up to 16 configurable analog PSoC blocks - includes SAR ADC (14-bit, 142 ksps), delta-sigma ADCs, PGAs, and CapSense® engines. |
| Digital Blocks | Up to 12 reconfigurable 8-bit digital blocks - combinable into 8–32-bit peripherals including UART, SPI, PWM, and CRC. |
| I/O Drive | 25 mA sink / 10 mA source per GPIO, with pull-up/pull-down/high-Z/open-drain modes - directly drives LEDs, relays, and logic interfaces. |
| Operating Voltage | 3.0 V to 5.25 V standard; down to 1.5 V using on-chip switched-mode pump - enables battery-powered and mixed-voltage designs. |
Pinout & Package
Package: 48-pin QFP (LQFP-48), 7 mm × 7 mm, 0.5 mm pitch, RoHS-compliant, industrial temperature range (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply input | 3.0–5.25 V supply for core, digital, and analog systems; decoupling required near pin. |
| VSS | Ground reference | Digital and analog common return; separate analog/digital ground routing recommended. |
| XIN/XOUT | 32.768 kHz crystal oscillator terminals | Supports precision RTC and PLL-based 24 MHz clock generation with external crystal. |
| P0[0]–P0[7] | Port 0 bidirectional GPIO | Configurable as digital/analog I/O; supports interrupt-on-change, CapSense®, and analog muxing. |
| P1[0]–P1[7] | Port 1 bidirectional GPIO | Same drive/sensing capabilities as Port 0; connects to global analog/digital interconnects. |
| SCL/SDA | I²C bus interface pins | Two hardware I²C resources support slave/master/multi-master up to 400 kHz - no bit-banging required. |
Key Features
| Feature | Design Value |
|---|---|
| Reconfigurable Analog Blocks | 16 independent analog resources support simultaneous ADC, DAC, PGA, comparator, and CapSense® - eliminates need for external signal conditioning ICs. |
| ISSP™ In-System Programming | Serial programming interface enables firmware updates without removing device from PCB - critical for field-deployed industrial controllers. |
| Switched-Mode Pump (SMP) | On-chip DC-DC converter enables operation down to 1.5 V - extends battery life in portable sensor nodes. |
| Global Digital Interconnect | Routing matrix allows any digital block output to connect to any GPIO or other block - enables custom peripheral synthesis without layout changes. |
| Capacitive Sensing Engine | Dedicated analog blocks with IDACs and modulators support >100-node touch interfaces with noise immunity - used in industrial panel controls. |
Applications
| Industrial HMI Panels | Smart Sensor Nodes |
|---|---|
Use Scenario: Touch-enabled operator interface on factory floor equipment with ESD-prone environment. IC Role / Device Role / Timing Role: Primary controller managing CapSense® buttons, LED indicators, UART communication to PLC, and local analog sensor acquisition. Use Value: Integrated CapSense® blocks eliminate external touch controller; 25 mA GPIO drive directly powers status LEDs without buffer transistors. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ via analog and digital sensors. IC Role / Device Role / Timing Role: Central data aggregator with SAR ADC for analog sensors, I²C for digital sensors, and low-power sleep mode between readings. Use Value: SMP enables 1.5 V operation extending battery life; partial flash updates allow remote firmware patches without full reprogramming. |
| Programmable Logic Controllers (PLC) I/O Modules | Medical Diagnostic Handhelds |
Use Scenario: DIN-rail mounted I/O expansion module with isolated digital inputs and relay outputs. IC Role / Device Role / Timing Role: Configurable digital block array implements high-speed counter for pulse inputs and PWM for solid-state relay timing control. Use Value: Reconfigurable 8–32-bit counters/timers replace discrete logic; ISSP™ supports post-deployment logic updates in fielded units. | Use Scenario: Portable blood glucose meter requiring precise analog front-end and low-noise signal acquisition. IC Role / Device Role / Timing Role: Precision analog subsystem with 14-bit SAR ADC, programmable gain amplifier, and internal voltage reference for sensor signal conditioning. Use Value: On-chip 1.2 V precision reference and rail-to-rail input amplifiers reduce component count and improve measurement repeatability. |
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 |
|---|---|---|---|
| CY8C28445-24LTXI | Same package and core, but reduced analog block count (12 vs. 16) and no delta-sigma ADC support. | Suitable for simpler analog tasks like basic CapSense® or single-channel ADC; lacks multi-channel synchronized sampling. | Select when design requires only SAR ADC and fewer analog resources - lower cost, same footprint. |
| CY8C29466-24LFXI | Higher resource count (24 KB flash, 2 KB SRAM, 24 digital blocks), same M8C core and pin-compatible 48-QFP package. | Supports more complex firmware and larger peripheral sets - e.g., dual UART + dual SPI + multiple PWMs simultaneously. | Choose for scalability-critical designs where future feature expansion is anticipated without PCB redesign. |
Compared with CY8C28445-24LTXI, the CY8C28645-24LTXI adds four analog blocks and delta-sigma ADC capability for advanced sensor fusion; versus CY8C29466-24LFXI, it trades flash/SRAM capacity for lower unit cost while retaining identical I/O and timing performance.
Availability
CY8C28645-24LTXI is available at Aetrix Electronics and suitable for industrial HMI panels, smart sensor nodes, PLC I/O modules, and medical diagnostic handhelds requiring stable component supply, long-term lifecycle support, and qualified automotive/industrial-grade packaging.
Supply support for CY8C28645-24LTXI 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 acquired Cypress Semiconductor in 2020 and maintains full product continuity, documentation, and support for the PSoC® 1 family.
The CY8C28xxx series belongs to the PSoC® 1 programmable mixed-signal SoC product line, designed specifically for cost-sensitive, low-power embedded control applications requiring configurable analog and digital peripherals in a single chip.
FAQ
Does CY8C28645-24LTXI support USB connectivity?
No, CY8C28645-24LTXI does not include native USB PHY or controller hardware. It supports UART, SPI, and I²C for host communication. USB interface requires external bridge ICs such as CP2102 or FT232RL, or migration to PSoC® 3/4 devices with integrated USB.
What development tools are required to program CY8C28645-24LTXI?
PSoC® Designer IDE (free Windows software) is mandatory for configuration and code generation. Programming requires MiniProg1 or MiniProg3 debuggers via ISSP™ interface. No JTAG support is provided - the device uses a proprietary 5-pin serial programming protocol.
Can CY8C28645-24LTXI operate reliably at 1.8 V?
Yes - using the on-chip switched-mode pump (SMP), CY8C28645-24LTXI operates down to 1.5 V. At 1.8 V, all digital and analog blocks function within specification, though maximum CPU speed is reduced to 12 MHz per the voltage/frequency derating curve in the datasheet.
Is there hardware support for cryptographic functions in CY8C28645-24LTXI?
No, CY8C28645-24LTXI lacks dedicated cryptographic accelerators or secure boot hardware. AES or SHA operations must be implemented in firmware using the M8C's 8×8 multiply/32-bit accumulate instruction - suitable for lightweight protocols but not high-throughput or certified security applications.
CY8C28645-24LTXI 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:
CY8C28645-24LTXI FAQ
1.How can I place an order for CY8C28645-24LTXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C28645-24LTXI 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 CY8C28645-24LTXI reliable?
The price and inventory of CY8C28645-24LTXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C28645-24LTXI is usually 5 days.
3.What payment methods are accepted for CY8C28645-24LTXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C28645-24LTXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C28645-24LTXI?
CY8C28645-24LTXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C28645-24LTXI 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 CY8C28645-24LTXI?
For technical support, including CY8C28645-24LTXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C28645-24LTXI requirements.
6.How does Aetrix verify that CY8C28645-24LTXI is sourced from the original manufacturer or authorized distributors?
All CY8C28645-24LTXI 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 CY8C28645-24LTXI meets industry standards.
7.What is the process for return or replacement of CY8C28645-24LTXI?
All CY8C28645-24LTXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C28645-24LTXI, 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 CY8C28645-24LTXI part is unused and in its original packaging.
Return procedure for CY8C28645-24LTXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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