SCC68692E1A44,512

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC68692E1A44,512 is a dual asynchronous receiver/transmitter (DUART) compatible with the S68000 bus. It provides two full-duplex channels within a single chip, featuring quadruple buffered receiver data registers to minimize overrun errors. Each channel supports independent programming of operating modes and baud rates, selectable from 22 fixed rates or derived from an internal counter/timer. The device includes a multipurpose 6-bit input port and an 8-bit output port for general I/O or specific control functions. It operates on a single +5 V supply and supports commercial temperature ranges.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous communication channels with independent configuration
• Quadruple buffered receiver data register to reduce interrupt overhead
• Programmable baud rate generator supporting multiple clock sources
• Integrated multipurpose input and output ports with change-of-state detection

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel applications
• S68000 family microprocessor interface designs
• Polled or interrupt-driven serial communication systems

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify component authenticity through authorized distributors. Confirm package integrity and pin alignment against the PLCC44 specification. Review datasheet revisions for any historical updates. Ensure environmental compliance documentation matches project requirements. Validate electrical characteristics against system voltage and timing constraints before integration.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when S68000 bus compatibility is required. Choose based on the need for two independent asynchronous channels in a single package. Consider the quadruple buffering for high-throughput interrupt-driven applications. Verify that the +5 V supply and TTL/CMOS levels match the target system architecture.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the Philips Semiconductors SCC68692 DUART family. It supersedes earlier data specifications from 1998. The device is designed as a CMOS-LSI communications solution. It interfaces directly with microprocessors using standard bus protocols. The E1 suffix indicates the industrial temperature range variant.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SCN68681 is documented as a compatible predecessor. Verify pinout and register compatibility before substitution. Check if the replacement meets the specific temperature and voltage requirements of the original design.