SC16C554

Updated: 2026-07-15

Overview

The SC16C554 is a quad UART integrated circuit developed for high-performance serial communication applications. It integrates four independent UART channels, each equipped with 16-byte FIFO buffers to reduce CPU overhead and improve data throughput. Manufactured using CMOS technology, this IC is known for its low power consumption and robust performance in industrial environments. Designed to meet the demands of embedded systems, the SC16C554 supports programmable baud rates, making it versatile for various communication standards. Its industrial temperature range (-40°C to +85°C) ensures reliable operation in harsh conditions, making it a preferred choice for industrial automation, networking, and point-of-sale systems.

Structure and Working Principle

The SC16C554 consists of four independent UART channels, each with its own set of registers for configuration and data handling. Each channel includes a transmitter and receiver, supported by 16-byte FIFO buffers to minimize CPU interrupts and enhance efficiency. The IC communicates with a host microcontroller via a parallel interface, typically an 8-bit data bus. The working principle involves converting parallel data from the host into serial data for transmission and vice versa for reception. The programmable baud rate generator allows flexible communication speeds, while interrupt-driven operation ensures timely data handling. Advanced features like auto-flow control (RTS/CTS) further optimize data transfer in complex systems.

Key Features

The SC16C554 stands out for its quad-channel design, enabling simultaneous management of multiple serial communication links. Its 16-byte FIFO buffers significantly reduce the load on the host CPU, making it ideal for high-throughput applications. The IC supports baud rates up to 5 Mbps, catering to high-speed communication needs. Additional features include programmable interrupt priorities, modem control signals (DTR, DSR, etc.), and compatibility with 3.3V or 5V systems. The industrial-grade temperature range ensures performance in extreme conditions, while its low power consumption aligns with energy-efficient design principles.

Application Areas

The SC16C554 is widely used in industrial automation, where reliable serial communication is critical for machinery control and sensor networks. Its quad-channel capability makes it suitable for networking equipment, such as routers and switches, requiring multiple serial ports. In embedded systems, the IC is employed in point-of-sale terminals, medical devices, and telecommunications hardware. Its robustness also lends itself to automotive applications, where temperature fluctuations and electrical noise are common challenges.

Maintenance and Precautions

To ensure longevity, the SC16C554 should be operated within its specified voltage and temperature ranges. Proper PCB layout practices, such as minimizing trace lengths and using decoupling capacitors, are essential to maintain signal integrity. ESD precautions must be observed during handling and installation. Avoid exposing the IC to static electricity, and use grounded workstations. Regular firmware updates for the host system can address potential communication issues and optimize performance.

B2B Procurement Guide

When procuring the SC16C554, verify the supplier's authenticity to avoid counterfeit components. Reputable distributors like Digi-Key, Mouser, or authorized manufacturers' partners are recommended. Bulk purchases typically offer cost savings, with prices ranging approximately $5-$15 per unit. Key procurement considerations include lead time, packaging (TQFP or PLCC), and compliance with industry standards (e.g., RoHS). Ensure the IC's specifications match your application requirements, such as operating temperature and voltage levels.