ZDU0110RFX

Overview

The ZDU0110RFX is a single-chip CMOS Digital Universal Asynchronous Receiver/Transmitter (UART) manufactured by Zilog. It provides full-duplex asynchronous communications with a 128-byte FIFO buffer, allocated as 64 bytes for receive and 64 bytes for transmit operations. The device integrates a 4 kbit EEPROM and General-Purpose Input and Output (GPIO) pins with programmable interrupt capabilities. An internal 8 MHz oscillator eliminates the need for an external crystal. Controlled via the I2C protocol, it supports up to four devices on the same network and operates on a single power supply ranging from 1.8 V to 5.0 V.

Feature Summary

• Integrated internal 8 MHz oscillator removes requirement for external crystal components
• Dual UART channels with independent 64-byte receive and transmit FIFO buffers
• Built-in 4 kbit EEPROM accessible via standard I2C communication protocols
• Configurable GPIO pins with individual direction, pull-up, and debounce settings

Applications

• Point of Sale devices
• Communication bridges
• Process control systems
• Building automation control
• Terminal servers
• Print systems

Procurement Notes

Verify package availability and lead times directly with authorized distributors or the manufacturer. Confirm RoHS compliance status and lifecycle stage before procurement. Ensure I2C address pin configurations match system requirements. Check for end-of-life notifications if long-term supply is required.

Selection Notes

Select this component when space-constrained designs require integrated serial communication and non-volatile storage. The internal oscillator simplifies PCB layout by removing crystal components. Verify that the host controller supports the I2C interface and can handle the specific interrupt line configurations provided by the GPIO and UART sections.

Part Context

The ZDU0110RFX belongs to Zilog's Digital UART family, which consolidates serial communication, memory, and general-purpose I/O into a single package. This integration reduces component count and board space compared to discrete solutions. The RFX suffix specifically denotes the 32-pin QFN package variant within the product line.

Replacement Considerations

No public confirmed substitute part numbers are available in the documentation. Evaluate alternative Digital UARTs with similar I2C interfaces and FIFO sizes if replacement is necessary.