SCC2681AE1N28,112

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The NXP SCC2681AE1N28 is a dual asynchronous receiver/transmitter (DUART) manufactured in a CMOS process. It provides two independent full-duplex channels within a 28-pin DIP package. The device supports programmable data formats including 5 to 8 data bits, parity options, and 1, 1.5, or 2 stop bits. Each channel features quadruple buffered receiver data registers and selectable baud rates ranging from 50 to 115.2 kbps via fixed rates, a 16-bit counter/timer, or external clocks. Operating parameters include a supply voltage of 4.5 V to 5.5 V, an operating current of 10 mA, and a temperature range of -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 interrupt overhead
• Integrated multipurpose 7-bit input port and 8-bit output port for general I/O or control functions
• Versatile interrupt system with single INTRN output and configurable wire-ORable interrupt signals

UARTs (Universal Asynchronous Receiver Transmitter) Applications

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

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific suffix AE1N28 against official documentation to confirm industrial temperature ratings and package dimensions. Confirm availability status as this component may be subject to discontinuation or lifecycle changes. Ensure compatibility with existing PCB footprints for the 28-pin DIP configuration before procurement.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when dual independent UART channels are required within a single integrated circuit. Consider the quadruple buffering feature for high-throughput applications to reduce CPU interrupt load. Verify that the 28-pin DIP package meets the mechanical constraints of the target design compared to alternative PLCC or DIP40 variants.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SCC2681 family of dual universal asynchronous receiver/transmitters. It serves as a replacement for legacy components such as the SCN2681. The device integrates timing circuits, a crystal oscillator, and programmable counters to support various asynchronous communication protocols without external clock generation hardware.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Public confirmed substitute: SCN2681.