SC26C92A1B,551

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The SC26C92A1B,551 is a dual universal asynchronous receiver/transmitter (DUART) manufactured by NXP Semiconductors. It provides two independent full-duplex channels within a single package. The device features an 8-byte FIFO for both the receiver and transmitter to minimize overrun and underrun risks. It operates on a single +5V power supply with a voltage range of 4.5V to 5.5V. The maximum data transfer rate reaches 230.4 kb/s at standard speeds, extending up to 1 Mb/sec using external clocks. The component supports industrial temperature ranges from -40°C to +85°C and is housed in a 44-pin PQFP package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent asynchronous receiver/transmitter channels
• Eight-character FIFOs for both receive and transmit paths
• Programmable baud rates including fixed rates and external clock inputs
• Integrated counter/timer and multipurpose I/O ports

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Clustered terminal systems requiring dual-speed channel applications
• Interrupt-driven microprocessor communication interfaces
• Systems utilizing modem or DMA interface requirements

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Confirm availability status as distribution channels may list discontinued items. Ensure the source document matches the exact part number to validate electrical characteristics and pin configurations before integration into designs.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when dual independent UART channels are required within a single footprint. Consider the 8-byte FIFO depth for reducing CPU interrupt overhead in high-throughput scenarios. Verify that the 5V logic levels and PQFP package dimensions align with the target system constraints and board layout specifications.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The SC26C92 serves as a functional replacement for legacy devices like the SCC2692 and SCN2681 while offering enhanced performance through deeper FIFOs and extended baud rate capabilities. It maintains backward compatibility in configuration upon power-up. The device represents a CMOS-LSI solution designed for robust serial communication in industrial and commercial embedded environments.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The SC26C92A1N is the equivalent DIP-40 package variant. The SC26C92A1A corresponds to the PLCC-44 package option. These parts share identical internal functionality but differ in physical form factor and pinout arrangement.