SCC2692AE1B44,557

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SCC2692AE1B44,557 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 an industrial temperature range of -40°C to +85°C. It interfaces directly with microprocessors via an 8-bit data bus and features quadruple buffered receiver registers to minimize overrun errors. Each channel allows independent programming of operating modes, data formats, and baud rates derived from a programmable counter/timer or external clocks.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous receiver/transmitters with independent channel configuration
• Quadruple buffered receiver data register for reduced interrupt overhead
• Programmable data format supporting 5 to 8 data bits plus parity and variable stop bits
• Integrated 16-bit programmable counter/timer and versatile interrupt system

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 the exact package type and temperature rating. Ensure compatibility with existing system voltage levels and interface requirements before integration. Cross-reference the part number with official distributor catalogs to validate availability and sourcing channels.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a system requires two independent asynchronous serial ports with high buffering capabilities. Consider the industrial temperature range (-40°C to +85°C) for environments exceeding commercial limits. Evaluate the need for independent baud rate generation per channel and the availability of general-purpose I/O ports for additional control signals.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This component belongs to the SCC2692 family of Dual Universal Asynchronous Receiver/Transmitters. It serves as a CMOS-LSI communications device designed to replace older standards like the SCN2681 while offering enhanced features such as deeper FIFOs and flexible clocking options. The family includes various package options including DIP, PLCC, and PQFP configurations.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

SCC2692AC1B44 is a commercially rated version of the same device in the identical PQFP44 package. Verify that the application environment remains within the 0°C to +70°C range if substituting the commercial variant for the industrial-rated AE1 suffix.