SCC2692AC1N28,129

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC2692AC1N28,129 is a dual asynchronous receiver/transmitter (DUART) manufactured by NXP USA Inc. It provides two full-duplex asynchronous channels within a single package and interfaces directly with microprocessors in polled or interrupt-driven systems. The device features quadruple buffered receiver data registers to minimize overrun potential. Each channel supports programmable data formats including 5 to 8 data bits plus parity and 1, 1.5, or 2 stop bits. Baud rates are selectable from 22 fixed rates ranging from 50 to 115.2k baud, non-standard rates up to 115.2Kb, or external clocks. Maximum data transfer rates reach 1MB/sec at 1X clock and 125kB/sec at 16X clock. It operates on a single +5V supply and includes an on-chip crystal oscillator.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous receiver/transmitters
• Quadruple buffered receiver data register
• Programmable data format with flexible parity and stop bit options
• Versatile interrupt system with maskable conditions

UARTs (Universal Asynchronous Receiver Transmitter) Applications

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

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against official documentation to confirm temperature range and package type. Confirm that the component meets RoHS compliance requirements for your target market. Ensure the voltage supply matches the specified +5V requirement. Check for any obsolete status notifications from the manufacturer regarding this specific part number before finalizing procurement plans.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when independent programming of operating speeds for both receiver and transmitter is required. Consider the quadruple buffering feature if minimizing interrupt overhead in high-throughput systems is critical. Verify that the available pin count in the 28-pin DIP package aligns with the design constraints. Ensure the application environment falls within the commercial temperature range specifications provided in the datasheet.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SCC2692 series is compatible with the SCN2681 standard. It serves as a CMOS-LSI communications device providing two complete UART channels. This integration allows for simplified board designs compared to using discrete UART components. The device supports various clocking options including internal counters and external inputs for flexible timing configurations.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC2692AE1N28

UARTs (Universal Asynchronous Receiver Transmitter) FAQ

How does the SCC2692 handle receiver buffer overruns?

The device utilizes quadruple buffered receiver data registers 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 22 fixed baud rates, non-standard rates derived from a programmable counter/timer, or external 1X or 16X clocks.

Can the operating modes of the two channels be programmed independently?

Yes, the operating mode and data format of each channel can be programmed independently, allowing for different configurations on Channel A and Channel B.