SCC68692E1A44,518

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC68692E1A44,518 is a Dual Universal Asynchronous Receiver/Transmitter (DUART) manufactured by NXP Semiconductors. It provides two independent full-duplex asynchronous receiver/transmitter channels within a single package. The device is compatible with the S68000 bus and interfaces easily with other microprocessors. It operates on a single +5 V power supply and supports commercial temperature ranges from 0 to +70 °C. The component utilizes a 44-Pin Plastic Leaded Chip Carrier (PLCC) package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous receiver/transmitters with quadruple buffered receiver data registers
• Programmable baud rate generator supporting fixed rates up to 115.2 kbaud or external clocks
• Integrated multipurpose 6-bit input port and 8-bit output port for general I/O or control functions
• Versatile interrupt system with maskable conditions and vector output capability

UARTs (Universal Asynchronous Receiver Transmitter) Applications

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

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific suffix E1A44,518 against official documentation to confirm industrial temperature range availability and lead-free compliance status. Ensure the PLCC-44 package matches the target PCB footprint requirements. Confirm that the commercial variant specifications align with the intended operating environment before finalizing procurement orders.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when S68000 bus compatibility is required alongside dual-channel asynchronous communication capabilities. Consider the quadruple buffering feature for reducing CPU interrupt overhead in high-throughput environments. Evaluate the programmable counter/timer and flexible clocking options if non-standard baud rates are necessary for the specific application design.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This DUART is part of the SCC68692 family, which serves as a CMOS-LSI communications device. It supersedes earlier data specifications from Philips Semiconductors. The device integrates timing circuits, including a crystal oscillator and baud rate generator, directly onto the chip to simplify system design and reduce external component count.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SCN68681 is documented as a compatible device within the same family. Verify pinout and register compatibility before substitution. No other public substitute part numbers are confirmed in the provided source material.