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Infineon Technologies CY7C63903-PVXC
- Part No.:
- CY7C63903-PVXC
- Manufacturer:
- Infineon Technologies
- Category:
- Controllers
- Package:
- 28-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
CY7C63903-PVXC.pdf
- Description:
- IC USB PERIPHERAL CTRLR 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,788
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Product details
Overview
CY7C63903-PVXC from Cypress Semiconductor is an enCoRe™ II 8-bit Flash-programmable microcontroller with integrated low-speed USB and PS/2 interface, Harvard architecture M8C core, up to 8 KB Flash, 256 bytes RAM, and 36 GPIO pins. It operates from 4.0–5.25 V, supports crystalless USB timing (24 MHz ±1.5%), and integrates a 3.3 V regulator, internal pull-up resistors, and dual-mode auto-configuration for HID peripherals like optical mice and keyboards.
For engineers reviewing the CY7C63903-PVXC datasheet, CY7C63903-PVXC pinout, CY7C63903-PVXC application, or CY7C63903-PVXC equivalent, key selection considerations include its USB/PS/2 dual-mode capability without external mode-switching components, 2-channel 8-bit capture timers for RF input edge timing, programmable 3.3 V I/O drive strength (8–50 mA), and in-system reprogrammability via D+/D– pins.
Technical Context
The CY7C63903-PVXC implements a dedicated USB Serial Interface Engine (SIE) supporting one Low-Speed USB device address, one control endpoint, and two data endpoints - fully compliant with USB 2.0 and HID 1.1 specifications. Its internal 24 MHz oscillator is dynamically tuned to USB timing requirements, eliminating need for external crystal unless higher precision is required.
It features a vectored interrupt controller with 23 maskable sources including USB transaction completion, GPIO edge interrupts (rising/falling polarity programmable on P0.2–P0.4), capture timer events, and programmable interval timer with 1 µs resolution. The dual 8-bit capture timers (on P0.5/TIO0 and P0.6/TIO1) store both rising and falling edge timestamps from the 16-bit free-running timer, enabling precise RF signal demodulation in wireless remote applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Speed | Low-Speed (1.5 Mbps); meets USB 2.0 spec for HID-class devices without external transceiver |
| Core Architecture | Harvard M8C CPU; enables deterministic instruction fetch and separate data memory space for real-time HID response |
| Memory | 8 KB Flash + 256 bytes RAM; supports EEROM emulation and in-system firmware updates via D+/D– |
| GPIO Count | Up to 36 pins; Port 0–1 configurable per-pin, Ports 2–4 grouped; includes 4 × 3.3 V-tolerant I/O with 50 mA sink capability |
| Capture Timers | Two 8-bit (or one ganged 16-bit) capture units; latch rising/falling edge times on P0.5/P0.6 for RF pulse decoding |
| Power Management | 10 µA sleep current; internal wake-up timer enables periodic suspend-mode polling without external circuitry |
| Regulator | Integrated 3.3 V LDO (125 mA); powers external 3.3 V logic and eliminates need for discrete regulator in HID designs |
Pinout & Package
Package: 28-pin SSOP (Small Outline Integrated Circuit), body width 5.6 mm, lead pitch 0.65 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.0/D+ | USB Differential Data+ | Low-speed USB bidirectional data line; also functions as PS/2 SDATA when in PS/2 mode |
| P1.1/D– | USB Differential Data– | Internal 1.5 kΩ pull-up controlled by firmware; also PS/2 SCLK in PS/2 mode |
| P1.2/VREG | 3.3 V Regulator Output | Provides regulated 3.3 V supply; sinks up to 125 mA for external logic or sensors |
| P0.5/TIO0 | Capture Timer Input 0 | Rising/falling edge-triggered input for first 8-bit capture timer; used for RF carrier timing |
| P0.6/TIO1 | Capture Timer Input 1 | Second edge-triggered capture input; pairs with P0.5 for 16-bit wide pulse measurement |
| P0.2/INT0 | Programmable Interrupt 0 | Dedicated rising-edge interrupt pin; no port-group dependency; used for button wake-up or sensor event |
| P1.4/SCLK | SPI Clock | Configurable master/slave SPI clock output/input; supports up to 2 Mbps transfers |
| VCC | Main Power Supply | 4.0–5.25 V DC input; powers core, USB PHY, and I/O; decoupling required at pin |
| VSS | Ground Reference | Digital ground return; separate analog ground not required due to integrated USB PHY design |
Key Features
| Feature | Design Value |
|---|---|
| Crystalless USB Timing | Internal 24 MHz oscillator auto-tuned to USB timing spec (±1.5%); removes BOM cost and layout area for crystal/resonator |
| USB/PS/2 Dual-Mode Auto-Switch | No GPIO pins or external logic needed to switch modes; D+/D– pins auto-reconfigure based on host handshake |
| High-Drive GPIO | Five pins support 50 mA sink current; directly drives LEDs, small relays, or optocouplers without buffer transistors |
| Edge-Capture Precision | Two independent 8-bit capture registers per timer; stores both rising and falling edge timestamps for accurate pulse-width analysis |
| Low-Power Suspend Wake-Up | Internal wake-up timer generates periodic interrupts during USB suspend; enables battery-powered remotes with <10 µA quiescent draw |
Applications
| Optical Mouse | Wireless Remote Control |
|---|---|
Use Scenario: Optical mouse with CMOS image sensor and motion processing firmware. IC Role / Device Role / Timing Role: USB peripheral controller handling HID report generation, sensor SPI interface, and low-power suspend/resume. Use Value: Integrated 24 MHz oscillator and USB transceiver eliminate crystal and external PHY; 36 GPIO enable direct sensor/LED control without level shifters. | Use Scenario: IR or RF-based universal remote with multi-protocol encoding and battery operation. IC Role / Device Role / Timing Role: Edge-capture timer measures incoming RF carrier period; USB/PS/2 dual mode allows PC or console compatibility. Use Value: P0.5/P0.6 capture timers record precise RF pulse edges; 10 µA sleep current extends coin-cell battery life beyond 12 months. |
| Gaming Keypad | POS Barcode Scanner |
Use Scenario: Mechanical gaming keypad with RGB backlighting and macro key programming. IC Role / Device Role / Timing Role: HID keyboard controller managing matrix scan, LED PWM, and USB report transmission. Use Value: 50 mA GPIO sink drives multiple LEDs per key; 8 KB Flash stores user-configurable macros and lighting profiles. | Use Scenario: Handheld barcode scanner with laser diode driver and USB HID interface. IC Role / Device Role / Timing Role: Peripheral controller managing laser trigger timing, decode engine interface, and USB report formatting. Use Value: Internal 3.3 V regulator powers laser driver IC; SPI master mode interfaces to decode ASIC at 2 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-speed USB peripheral controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CY7C63823-PXI | 24-pin QSOP; lacks P0.0/CLKIN and P0.1/CLKOUT pins; same core, memory, and USB features | Reduced GPIO count (24 pins vs. 28); no external clock input/output capability | Select when board space is constrained and external clock routing is unnecessary |
| CY7C63923-PXI | 48-pin SSOP; adds Port 4 (8 GPIO), P3.3–P3.7, and enhanced SPI configuration options | Supports larger HID devices (e.g., multi-function keyboards) requiring >36 GPIO or additional serial interfaces | Select when expanding I/O count or adding secondary SPI peripherals is required |
Compared with CY7C63823-PXI, CY7C63903-PVXC provides external clock I/O flexibility and full 28-pin GPIO access; versus CY7C63923-PXI, it offers identical core functionality in a smaller footprint and lower cost where extended I/O is not needed.
Availability
CY7C63903-PVXC is available at Aetrix Electronics and suitable for optical mouse development, wireless remote control design, gaming keypad production, and POS barcode scanner manufacturing requiring stable component supply and long-term industrial availability.
Supply support for CY7C63903-PVXC 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 system-on-chip (PSoC), USB connectivity, and mixed-signal solutions for embedded applications.
The enCoRe™ II product line was designed specifically for cost-sensitive, low-speed USB HID peripherals - integrating oscillator, regulator, USB transceiver, and dual-mode PS/2 support to minimize external components and PCB area.
FAQ
Does CY7C63903-PVXC require an external crystal for USB operation?
No. The device features a crystalless internal 24 MHz oscillator auto-tuned to USB Low-Speed timing requirements (±1.5%). An external 12 MHz or 24 MHz crystal is optional for higher precision but not required for full USB compliance.
Can CY7C63903-PVXC operate in both USB and PS/2 modes simultaneously?
No - it operates in either USB or PS/2 mode, but switches automatically based on host detection. No firmware or GPIO intervention is needed; D+/D– pins reconfigure internally, and internal 5 kΩ pull-ups activate for PS/2 SCLK/SDATA functionality.
What is the maximum sink current capability of GPIO pins on CY7C63903-PVXC?
Five designated GPIO pins (including P1.0–P1.4) support configurable 50 mA sink current. Other GPIOs default to 8 mA sink. Drive strength is set per-pin via register configuration and does not require external drivers for most LED or relay loads.
How is firmware updated in-system on CY7C63903-PVXC?
Firmware is updated via the D+ and D– pins using Cypress's proprietary serial programming protocol - not standard USB. The device enters programming mode upon power-up with specific pin states, allowing field updates without removing the chip from the PCB.
CY7C63903-PVXC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Package/Case:
- 28-SSOP (0.209", 5.30mm Width)
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Controller
- Interface:
- GPIO, SPI
- Standards:
- USB 2.0
- Voltage - Supply:
- 4V ~ 5.5V
- Current - Supply:
- 40mA
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Grade:
- -
- Qualification:
- -
CY7C63903-PVXC FAQ
1.How can I place an order for CY7C63903-PVXC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY7C63903-PVXC 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 CY7C63903-PVXC reliable?
The price and inventory of CY7C63903-PVXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY7C63903-PVXC is usually 5 days.
3.What payment methods are accepted for CY7C63903-PVXC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY7C63903-PVXC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY7C63903-PVXC?
CY7C63903-PVXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY7C63903-PVXC 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 CY7C63903-PVXC?
For technical support, including CY7C63903-PVXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY7C63903-PVXC requirements.
6.How does Aetrix verify that CY7C63903-PVXC is sourced from the original manufacturer or authorized distributors?
All CY7C63903-PVXC 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 CY7C63903-PVXC meets industry standards.
7.What is the process for return or replacement of CY7C63903-PVXC?
All CY7C63903-PVXC units undergo pre-shipment inspection (PSI). If there is an issue with CY7C63903-PVXC, 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 CY7C63903-PVXC part is unused and in its original packaging.
Return procedure for CY7C63903-PVXC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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