SC28L92A1B,557

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC28L92A1B,557 is a dual universal asynchronous receiver/transmitter (DUART) from NXP Semiconductors. It operates on a single 3.3 V or 5 V supply and supports data transfer rates up to 1 Mbit/s. The device features two independent full-duplex channels, each equipped with 16-byte transmit and receive FIFOs. It provides pin-programmable compatibility with Intel 80xxx and Motorola 68xxx bus interfaces. The component includes an on-chip crystal oscillator, programmable baud rate generators, and a versatile interrupt system. It is housed in a QFP44 package and functions within a temperature range of -40 °C to +85 °C.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous channels with 16-byte FIFOs for both transmission and reception
• Pin-programmable interface supporting both Intel 80xxx and Motorola 68xxx bus architectures
• Integrated on-chip crystal oscillator and programmable baud rate generator supporting rates up to 1 Mbit/s
• Versatile interrupt system with maskable conditions and configurable output port signals

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel applications
• Microprocessor-based serial communication interfaces
• Systems utilizing polled or interrupt-driven modem and DMA interfaces

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and temperature grade. Ensure the I/M pin configuration matches the target microprocessor bus architecture before integration. Confirm that the power supply voltage aligns with the selected operating mode specifications.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a dual-channel UART solution with deep FIFOs is required for high-performance serial communication. Consider the QFP44 package dimensions for PCB layout constraints. Evaluate the need for specific bus interface compatibility, as the device supports both Intel and Motorola architectures through pin programming.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SC28L92A1B,557 belongs to the IMPACT family of devices, designed for robust operation across industrial temperature ranges. It serves as a functional replacement for legacy components like the SCC2692 and SC26C92, offering enhanced features such as deeper FIFOs and extended baud rate capabilities while maintaining backward compatibility.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC28L92 is documented as a pin and function replacement for the SCC2692 and SC26C92. Verify register configurations, particularly regarding FIFO modes and interrupt handling, as the SC28L92 introduces additional registers like Mode Register 0.