SCC2692AE1A44,512

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC2692AE1A44,512 is a dual asynchronous receiver/transmitter (DUART) compatible with the SCN2681. It provides two full-duplex channels in a single package, interfacing directly with microprocessors via an 8-bit data bus and 4 address lines. The device supports independent programming of operating speed for each channel, selectable from 22 fixed baud rates (50 to 115.2k), non-standard rates up to 115.2kbps, or external clocks. Maximum data transfer rates reach 1MB/sec with a 1X clock and 125kB/sec with a 16X clock. It features quadruple buffered receiver registers, programmable data formats (5-8 bits plus parity), and a 16-bit counter/timer. The component operates on a single +5V supply within commercial and industrial temperature ranges.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous receiver/transmitters with independent channel configuration
• Quadruple buffered receiver data register to minimize overrun potential
• Programmable baud rate generator supporting fixed rates, user-defined rates, and external clocks
• Integrated multipurpose 7-bit input port and 8-bit output port with change-of-state detection

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 mode

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature range. Confirm that the '512' suffix corresponds to the intended reel or tape specification if applicable. Ensure compatibility with existing system voltage levels and interface timing requirements before finalizing procurement orders.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when dual independent UART channels are required within a single footprint. Consider the quadruple buffering feature for high-throughput interrupt-driven environments to reduce CPU overhead. Verify that the available clock sources meet the frequency requirements for the desired baud rates and data transfer speeds.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SCC2692 series serves as a CMOS-LSI communications device designed for robust serial data handling. It supersedes earlier specifications and maintains compatibility with the SCN2681 standard. The device integrates essential timing circuits, including a crystal oscillator and baud rate generator, to facilitate direct connection to various microprocessor architectures without additional external logic.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC2692AC1A44