AXTEK Contactless Reader Solution – Low-Power 13.56 MHz NFC IC

The ZX3803 is a highly integrated 13.56 MHz contactless reader IC supporting ISO/IEC 14443 Type A and Type B protocols.
As an authorized distributor and solution partner, AXTEK provides not only original ZX3803 devices, but also technical support, reference designs, and sample application assistance, helping customers accelerate product development and mass production.

ZX3803 is designed for low-power, low-voltage, and cost-sensitive NFC reader applications, making it an ideal choice for access control, smart locks, and financial-grade contactless devices.

Why Choose ZX3803 from AXTEK?

✔ Authorized Supply & Stable Delivery

AXTEK ensures genuine components, stable supply channels, and long-term availability, reducing procurement risks for both pilot runs and mass production.

✔ Design-in & Technical Support

AXTEK supports customers throughout the full development cycle:

    *  Component selection and design-in guidance

    *  Reference schematics and RF matching recommendations

    *  Firmware interface consultation (SPI / I²C / UART)

    *  Sample application and validation support

This enables faster time-to-market and lower engineering risk.

ZX3803 Key Features

ISO/IEC 14443 Type A & Type B Compliance

ZX3803 fully complies with ISO/IEC 14443 Type A and Type B, ensuring broad compatibility with contactless cards and secure NFC media used in financial and access-control systems.

Ultra-Low Power with LPCD

The integrated Low-Power Card Detection (LPCD) function allows the system to remain in a low-power standby state while monitoring the RF field, making ZX3803 ideal for battery-powered and always-on devices.

Flexible MCU Interfaces

ZX3803 supports multiple host interfaces, automatically detected after reset:

    *  SPI up to 10 Mbit/s

    *  I²C Fast Mode up to 400 kbit/s

    *  UART up to 1228.8 kbit/s

This flexibility allows easy integration with a wide range of microcontrollers.

Strong RF Performance

    *  Integrated power amplifier driver with adjustable output power

    *  Adjustable receiver gain

    *  Supports 106 / 212 / 424 kbit/s data rates

AXTEK can assist with antenna tuning and RF optimization to achieve reliable performance in real-world applications.

Reliability & Protection Features

ZX3803 includes multiple built-in protections and system features:

    *  64-byte TX/RX FIFO

    *  Integrated CRC controller

    *  Programmable timers and flexible interrupt modes

    *  EMV undershoot and overshoot optimization

    *  Built-in temperature sensor with automatic RF shutdown

These features ensure stable operation in financial, access control, and industrial environments.

Power & Operating Conditions

    *  Supply voltage: 2.0 V – 5.5 V

    *  Separate analog, digital, and RF transmitter power domains

    *  Supports hardware and software power-down modes

    *  External clock: 27.12 MHz with fast startup support

AXTEK provides power design recommendations to optimize efficiency and EMI performance.

Typical Applications

ZX3803 is widely used in:

    *  Contactless payment terminals

    *  Access control and attendance systems

    *  Smart door locks

    *  Financial card readers

    *  Portable and battery-powered NFC readers

    *  IoT authentication devices

Package Options

    *  QFN32

    *  SOP16

Work with AXTEK

By choosing ZX3803 through AXTEK, customers gain more than a component supplier:

• Professional pre-sales and post-sales technical support

• Sample availability and design verification assistance

• Support from prototype to mass production

• Long-term supply and lifecycle management

Contact AXTEK today to request samples, technical documentation, or project consultation for ZX3803-based NFC reader designs.