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Infineon Technologies CY8C24794-24LFXI
- Part No.:
- CY8C24794-24LFXI
- Manufacturer:
- Infineon Technologies
- Category:
- Microcontrollers
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
CY8C24794-24LFXI.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 56QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
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Product details
Overview
CY8C24794-24LFXI from Cypress Semiconductor is a programmable mixed-signal array (PSoC) with integrated 24 MHz M8C CPU, 16 KB Flash, 1 KB SRAM, six configurable analog blocks, four digital blocks, and full-speed USB 2.0 (12 Mbps) with dedicated 256-byte buffer - enabling single-chip replacement of MCU + analog/digital peripherals + USB transceiver in embedded human-interface and industrial control systems.
For engineers reviewing the CY8C24794-24LFXI datasheet, CY8C24794-24LFXI pinout, CY8C24794-24LFXI application, or CY8C24794-24LFXI equivalent, key selection criteria include USB timing accuracy (±0.25% IMO self-tuning), rail-to-rail analog block configurability (up to 14-bit ADC, 9-bit DAC), GPIO drive strength (25 mA sink, 33 mA analog output), and industrial temperature operation (–40°C to +85°C).
Technical Context
The CY8C24794-24LFXI implements a Harvard-architecture M8C core with interrupt controller (20 vectors), dual internal oscillators (24/48 MHz IMO ±8%, 32 kHz ILO), and programmable clock dividers routing to both analog and digital subsystems. Its USB subsystem operates without external crystal via IMO self-tuning to ±0.25% for USB compliance.
Analog resources include six configurable blocks arranged as three columns (one CT + two SC per column), supporting up to two 14-bit ADCs, two 9-bit DACs, PGAs (gain up to 93×), and capacitive sensing via analog mux bus with hardware-controlled precharge. Digital resources comprise four 8-bit blocks combinable into 8–32-bit timers, PWMs, UART, SPI, I²C, CRC, and PRS modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M8C 8-bit Harvard architecture, 24 MHz max - delivers ~4 MIPS for real-time embedded control with low power at high speed. |
| Memory | 16 KB Flash (50,000 erase/write cycles), 1 KB SRAM, EEPROM emulation in Flash - supports secure firmware updates and data logging. |
| USB Interface | Full-speed USB 2.0 (12 Mbps), 4 uni-directional + 1 bi-directional endpoint, 256-byte dedicated buffer - enables HID, CDC, and custom class devices without external PHY. |
| Analog Blocks | 6 configurable blocks (3 CT + 3 SC), supporting up to 14-bit ADC, 9-bit DAC, PGA (93× gain), comparator (16 thresholds) - enables sensor signal conditioning and closed-loop analog control. |
| Digital Blocks | 4 programmable 8-bit blocks, combinable into 8–32-bit peripherals including UART, SPI, I²C (400 kHz), PWM with dead-band, CRC, and PRS - eliminates need for discrete logic or protocol ICs. |
| GPIO | 50 pins with 25 mA sink, 33 mA analog output, 8 drive modes (strong, open-drain, pull-up/down, Hi-Z), interrupt on level/change - supports direct LED driving, capacitive touch, and mixed-signal interfacing. |
| Operating Range | 3.0–5.25 V supply, –40°C to +85°C industrial temp (USB functional from –10°C), ±4% internal oscillator - ensures robust operation across battery and line-powered systems. |
Pinout & Package
Package: 68-pin QFP (LQFP-68), 10 mm × 10 mm, 0.5 mm pitch, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 3.0–5.25 V power domain; multiple VSS pins ensure low-noise analog/digital separation. |
| USB_DP, USB_DM | USB differential data pair | Direct full-speed USB 2.0 interface; requires only two 27 Ω series resistors - no external transceiver or crystal needed. |
| P0[0]–P5[7], P7[0]–P7[1] | Configurable GPIO | 50 total I/O pins; each supports analog input (up to 48), analog output (2), digital peripheral routing, and interrupt generation. |
| XRES | External reset input | Active-low asynchronous reset; internal POR/LVD provides fallback if external reset is omitted. |
| XTAL_IN/XTAL_OUT | Optional crystal oscillator inputs | Not required for USB operation; used only if higher clock precision than IMO self-tuned ±0.25% is needed. |
Key Features
| Feature | Design Value |
|---|---|
| Configurable Analog System | Six independent analog blocks support simultaneous ADC, DAC, filter, and comparator functions - enables multi-channel sensor fusion without external opamps or converters. |
| USB Self-Tuning Oscillator | Internal main oscillator (IMO) auto-calibrates to ±0.25% accuracy for USB - eliminates BOM cost and board space for external crystal and load capacitors. |
| Capacitive Sensing Mux | Hardware-controlled analog mux with continuous precharge - delivers robust, low-power touch button/slider detection with minimal firmware overhead. |
| Programmable Digital Peripherals | Four digital blocks combine into UART, SPI, I²C, PWM, timers, and CRC - replaces discrete protocol ICs and reduces PCB layer count. |
| Flexible Memory Protection | Flash divided into 64-byte sectors with four protection levels - allows secure bootloader partitioning and IP-protected firmware modules. |
Applications
| USB Human Interface Device | Industrial Sensor Node |
|---|---|
|
Use Scenario: Touch-based control panel for HVAC or building automation with local processing and USB HID reporting to host PC. IC Role / Device Role / Timing Role: Single-chip USB HID device with capacitive touch sensing, analog sensor conditioning (temperature/humidity), and real-time event handling. Use Value: Eliminates separate MCU, USB transceiver, and analog front-end ICs; reduces BOM by ≥3 components and enables firmware-updatable UI behavior. |
Use Scenario: Distributed environmental monitor with analog sensor inputs (thermistor, pressure transducer), local alarm logic, and USB configuration interface. IC Role / Device Role / Timing Role: Mixed-signal system-on-chip performing analog signal acquisition, digital filtering, threshold-based alert generation, and USB parameter upload/download. Use Value: Achieves <12-bit effective resolution ADC and 9-bit DAC output using on-chip resources - avoids external precision converter ICs and calibration drift. |
| Embedded USB Firmware Updater | Capacitive Touch Controller |
|
Use Scenario: Field-deployable module that accepts new firmware over USB and reprograms its own Flash memory without external programmer. IC Role / Device Role / Timing Role: In-system programmable (ISSP™) PSoC executing secure partial Flash updates while maintaining runtime operation of critical peripherals. Use Value: Supports field firmware patches and feature upgrades via standard USB cable - removes need for JTAG/SWD debug headers and programming fixtures. |
Use Scenario: Low-cost touch keypad for white goods or medical devices requiring ESD-robust, water-tolerant button detection. IC Role / Device Role / Timing Role: Dedicated capacitive sensing engine using analog mux precharge and digital correlation to reject noise and detect wet-finger events. Use Value: Delivers >60 dB noise immunity and sub-100 ms response time using only internal resources - meets IEC 61000-4-6 Level 3 without shielded cables or guard traces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable mixed-signal USB microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY8C24894-24LFXI | Same package and core, but adds 2 additional digital blocks (6 total) and 16 KB extra Flash (32 KB total) | Required for designs needing >4 digital peripherals simultaneously (e.g., concurrent UART + SPI + USB + PWM) | Select when additional digital resource headroom or larger firmware footprint is needed; pin-compatible upgrade path. |
| STM32F072RB | ARM Cortex-M0 core, 48 MHz, 128 KB Flash, 16 KB RAM, USB 2.0 FS, but fixed-function analog (12-bit ADC, 12-bit DAC, no PGA/filter) | Suitable for USB-CDC or mass storage class where analog flexibility is secondary to code density and toolchain maturity | Select when leveraging existing ARM ecosystem tools and require higher CPU throughput, accepting reduced analog configurability. |
Compared with CY8C24894-24LFXI, this part trades digital resource margin for lower cost and smaller Flash; versus STM32F072RB, it offers superior analog signal chain customization but less general-purpose compute performance and community tool support.
Availability
CY8C24794-24LFXI is available at Aetrix Electronics and suitable for USB human-interface devices, industrial sensor nodes, embedded firmware updaters, and capacitive touch controllers requiring stable component supply and long-term manufacturability.
Supply support for CY8C24794-24LFXI 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) is a fabless semiconductor company specializing in programmable embedded solutions, USB connectivity, and mixed-signal SoCs for industrial, automotive, and consumer markets.
The CY8C24794 belongs to the PSoC 1 family - designed to replace discrete MCUs, analog front-ends, and interface ICs with a single configurable chip targeting cost-sensitive, medium-complexity embedded systems with USB connectivity.
FAQ
Does CY8C24794-24LFXI require an external crystal for USB operation?
No. The device uses an internal main oscillator (IMO) that self-tunes to ±0.25% accuracy for full-speed USB 2.0 compliance. Only two 27 Ω series resistors on USB_DP/USB_DM are required - no external crystal, load capacitors, or PLL components are needed.
Can all 50 GPIO pins be used for analog input simultaneously?
No. While up to 48 GPIO pins are routed to the analog mux bus, the analog system has only six configurable blocks and two dedicated analog output drivers. Simultaneous analog input sampling is limited by the number of active ADC user modules and shared analog bus bandwidth - typically up to 2 channels at full resolution.
What development tools are required to program CY8C24794-24LFXI?
PSoC Designer IDE (v5.4 or later) is mandatory for configuring analog/digital blocks and generating initialization code. Programming is performed via ISSP™ using a MiniProg1 or MiniProg3 programmer; no JTAG adapter is required. Free C compiler and debugger support are included.
Is CY8C24794-24LFXI qualified for automotive applications?
No. It is rated for industrial temperature range (–40°C to +85°C) but lacks AEC-Q100 qualification, extended temperature support (–40°C to +125°C), or automotive-specific reliability testing. For automotive use, consider Infineon's PSoC 4 or AURIX™ families instead.
CY8C24794-24LFXI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 56-VFQFN Exposed Pad
- Series:
- PSOC™1 CY8C24xxx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- M8C
- Core Size:
- 8-Bit
- Speed:
- 24MHz
- Connectivity:
- I2C, SPI, UART/USART, USB
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 50
- 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 48x14b; D/A 2x9b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
CY8C24794-24LFXI FAQ
1.How can I place an order for CY8C24794-24LFXI through Aetrix?
Please submit a Request for Quotation (RFQ) for CY8C24794-24LFXI 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 CY8C24794-24LFXI reliable?
The price and inventory of CY8C24794-24LFXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY8C24794-24LFXI is usually 5 days.
3.What payment methods are accepted for CY8C24794-24LFXI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY8C24794-24LFXI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY8C24794-24LFXI?
CY8C24794-24LFXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY8C24794-24LFXI 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 CY8C24794-24LFXI?
For technical support, including CY8C24794-24LFXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY8C24794-24LFXI requirements.
6.How does Aetrix verify that CY8C24794-24LFXI is sourced from the original manufacturer or authorized distributors?
All CY8C24794-24LFXI 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 CY8C24794-24LFXI meets industry standards.
7.What is the process for return or replacement of CY8C24794-24LFXI?
All CY8C24794-24LFXI units undergo pre-shipment inspection (PSI). If there is an issue with CY8C24794-24LFXI, 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 CY8C24794-24LFXI part is unused and in its original packaging.
Return procedure for CY8C24794-24LFXI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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