SCC68681C1A44,529

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The NXP SCC68681C1A44,529 is a Dual Universal Asynchronous Receiver/Transmitter (DUART) manufactured using CMOS technology. It integrates two independent full-duplex asynchronous channels within a PLCC-44 package. The device supports S68000 bus compatibility and operates on a single +5 V power supply. Each channel features quadruple buffered receiver data registers to minimize overrun errors. Programmable baud rates range from 50 to 115.2 kbaud, selectable via fixed rates or external clocks. The component includes a 16-bit programmable counter/timer, configurable I/O ports, and comprehensive error detection capabilities.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous communication channels with independent programming
• Quadruple buffered receiver data registers for reduced interrupt overhead
• Programmable data formats including variable data bits, parity options, and stop bits
• 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
• Clustered terminal systems requiring dual-speed channel applications
• Multidrop communication networks utilizing automatic wake-up modes

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation to confirm package type and temperature range. Confirm availability status as legacy components may have limited production runs. Ensure interface voltage levels match system requirements before integration.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when S68000 bus compatibility is required alongside dual asynchronous channels. Consider the PLCC-44 package constraints for PCB layout. Evaluate the need for quadruple buffering versus simpler FIFO structures in high-throughput environments.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the Philips/NXP SCC68681 family of DUARTs. It serves as a communications interface between microprocessors and serial devices. The device is designed for embedded systems requiring reliable asynchronous data transfer with flexible timing configurations.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC68681E1A44: Industrial temperature variant in PLCC-44 package.