SCC2692AE1N28,129

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC2692AE1N28 is a dual asynchronous receiver/transmitter (DUART) manufactured by NXP Semiconductors. It provides two full-duplex asynchronous channels within a single package, compatible with the SCN2681 standard. The device operates on a single +5V power supply and supports data transfer rates up to 1MB/sec at 1X clock or 125kB/sec at 16X clock. It features quadruple buffered receiver data registers, programmable baud rates from 50 to 115.2k baud, and a 16-bit programmable counter/timer. The component is housed in a 28-pin Plastic Dual In-Line Package (PDIP-28) and supports commercial and industrial temperature ranges.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous receiver/transmitters with independent channel programming
• Quadruple buffered receiver data register to minimize overrun potential
• Programmable data format supporting 5 to 8 data bits plus parity and variable stop bits
• Integrated multipurpose 7-bit input port and 8-bit output port for general I/O or control functions

UARTs (Universal Asynchronous Receiver Transmitter) Applications

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

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm the exact temperature range and package variant. Confirm availability status as legacy components may have limited distribution channels. Ensure the procurement source provides valid traceability documentation for the Philips/NXP semiconductor lineage.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a direct replacement for the SCN2681 is required with enhanced buffering capabilities. Consider the 28-pin DIP package constraint for through-hole mounting requirements. Evaluate the need for independent baud rate generation per channel versus shared clock architectures before finalizing the design.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SCC2692 family of dual universal asynchronous receiver/transmitters. It serves as a CMOS-LSI communications device designed to interface directly with microprocessors. The series includes variants with different pin counts and packages, such as 40-pin DIP and 44-pin PLCC options, offering flexibility for various system integration needs.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC2692AC1N28

UARTs (Universal Asynchronous Receiver Transmitter) FAQ

How does the SCC2692 handle receiver buffer overruns?

The device utilizes a quadruple buffered receiver data register to minimize the potential of receiver overruns and reduce interrupt overhead in interrupt-driven systems.

What clocking options are available for the baud rate generator?

Each receiver and transmitter can select its operating speed from eighteen fixed baud rates, a 16X clock derived from a programmable counter/timer, or an external 1X or 16X clock.

Can the input and output ports be used for purposes other than general I/O?

Yes, the multi-function 7-bit input port and 8-bit output port can be assigned specific functions such as clock inputs, status signals, or interrupt outputs under program control.