ZX3803

The ZX3803 is a low-voltage, compact contactless reader/writer IC developed by ZXInfoTek for mobile financial payment terminals and multi-card accepting applications. It is fully compliant with EMVCo and PBOC specifications.

The device is a highly integrated contactless communication IC operating at 13.56 MHz.With its low-voltage operation, low power consumption, strong driving capability, versatile interface support, and multi-protocol flexibility, the ZX3803 is well suited for contactless reader applications where low power, low voltage, and cost efficiency are critical.

Key Features

-Highly integrated modulation/demodulation circuitry.

-Requires very few external components.

-Supports ISO/IEC 14443 Type A communication protocol.

-Supports ISO/IEC 14443 Type B communication protocol.

-Supports high data transfer rates for ISO 14443 Type A: 212 kbit/s and 424 kbit/s.

-Supported host interfaces:

 • SPI interface with a maximum data rate of 10 Mbit/s.

 • I²C interface (Fast-mode) with a data rate of 400 kbit/s.

 • UART interface with a maximum data rate of 1228.8 kbit/s.

-64-byte transmit and receive FIFO buffers.

-Flexible interrupt modes.

-Programmable timer.

-Supports small-sized antennas.

-Compliant with EMVCo and PBOC standards.

-Three power-saving modes: hardware power-down, software power-down, and transmitter power-down —the latter disables the internal antenna driver and turns off the RF field.

-Built-in temperature sensor that automatically halts RF transmission when the chip temperature exceeds the safety threshold.

-Multiple independent power supply domains to prevent cross-interference between functional blocks and enhance system stability.

-Built-in CRC coprocessor.

-Internal oscillator requiring a 27.12 MHz crystal.

-Supply voltage range: 2.5 V to 3.6 V.

-RF transmitter driver powered by a separate supply rail, supporting up to 5.5 V.

-Supports low-power external card detection.

-QFN32 package (5 mm×5 mm).