SCC68681E1A44,518

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The NXP SCC68681E1A44,518 is a Dual Universal Asynchronous Receiver/Transmitter (DUART) manufactured by NXP Semiconductors. It provides two independent full-duplex asynchronous receiver/transmitter channels in a single package. The device operates on a single +5 V power supply with a minimum voltage of 4.5 V and a maximum of 5.5 V. It supports data transfer rates up to 115.2 kb/s for standard baud rates and up to 1 MB/sec at 1x clock speed. The component features quadruple buffered receiver data registers, programmable data formats including parity and stop bits, and an internal crystal oscillator. It is housed in a PLCC-44 package and is designed for industrial temperature ranges from -40°C to +85°C.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous receiver/transmitter channels with independent programming capabilities
• Quadruple buffered receiver data registers to minimize overrun potential and reduce interrupt overhead
• Programmable baud rate generator supporting fixed rates, external clocks, or counter/timer derived speeds
• Integrated multipurpose 6-bit input port and 8-bit output port with change-of-state detection

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Polled or interrupt-driven microprocessor systems requiring serial communication
• Clustered terminal systems utilizing dual-speed channel applications
• Multidrop communication networks employing automatic wake-up modes

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix, such as ,518, against official documentation to confirm package type and environmental rating. Confirm that the component meets RoHS and REACH SVHC requirements for your region. Check current availability status as this part may be discontinued or subject to limited supply constraints. Ensure compatibility with existing S68000 bus interfaces or target microprocessors before procurement.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select the SCC68681E1A44 variant specifically for industrial temperature environments ranging from -40°C to +85°C. Choose the PLCC-44 package version when surface mount technology is required for the design. Consider the device's compatibility with S68000 family buses if interfacing with legacy processors. Evaluate the need for quadruple buffering and independent channel programming to determine if this DUART meets the system's throughput and control requirements.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SCC68681 is part of the S68000 family of integrated circuits, designed to interface easily with other microprocessors. It serves as a communications device providing dual asynchronous channels. The component is manufactured using CMOS process technology. It is compatible with various commercial and industrial applications requiring reliable serial data transmission and reception.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and electrical specifications if considering alternative DUART components from other manufacturers.