SC28L92A1A,512

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC28L92A1A,512 is a Dual Universal Asynchronous Receiver/Transmitter (DUART) from the NXP IMPACT family. It operates on a single 3.3 V or 5 V supply and supports an operating temperature range of -40 °C to +85 °C. The device provides two independent full-duplex asynchronous channels, each equipped with 16-byte receive and transmit FIFOs. It features pin-programmable bus interfaces for either Motorola (68xxx) or Intel (80xxx) architectures. Data transfer rates reach up to 1 Mbit/s using external clocks. The component is housed in a PLCC44 package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual full-duplex asynchronous receiver/transmitter channels
• Pin-programmable 68xxx or 80xxx bus interface compatibility
• 16-character FIFOs for both receiver and transmitter paths
• Integrated watchdog timer for each receiver channel

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel operation
• Microprocessor interfacing in polled or interrupt-driven environments
• Systems utilizing modem and DMA interface protocols

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm package type and revision level. Ensure the required bus interface mode matches the target system architecture before procurement. Confirm that the voltage supply requirements align with the design specifications.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a direct replacement for SCC2692 or SC26C92 is needed with enhanced FIFO depth. Choose based on the required bus interface: connect I/M high for 80xxx or low for 68xxx. Verify that the PLCC44 package fits the PCB layout constraints. Consider the extended baud rate capabilities if higher speeds than standard fixed rates are required.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the SC28L92 series within the NXP IMPACT family. It serves as a functional upgrade over the SC26C92, offering deeper buffers and additional control registers like Mode Register 0. The device maintains backward compatibility while providing expanded timing and interrupt management features for complex serial communication tasks.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC28L92 acts as a pin and function replacement for the SCC2692 and SC26C92. While it offers deeper FIFOs and extended baud rates, designers must account for the addition of Mode Register 0 and potential differences in power-up configuration behavior compared to legacy parts.