The ST16C654CJ68 is a quad UART (Universal Asynchronous Receiver/Transmitter) manufactured by Exar Corporation. This device provides four independent UART channels, each capable of asynchronous serial communication. It's designed for applications requiring multiple serial ports, such as multi-port serial cards, communication hubs, and embedded systems.

Applications

• Multi-port serial cards
• Communication hubs and routers
• Embedded systems with multiple serial devices
• Industrial automation equipment
• Point-of-sale (POS) systems

Features

• Four independent UART channels
• Data rates up to 1.5 Mbps
• 64-byte transmit and receive FIFOs per channel
• Automatic hardware/software flow control
• Programmable baud rate generator

Benefits

• Increased system throughput: Four independent UART channels allow for simultaneous communication with multiple serial devices, increasing system throughput.
• Reduced CPU overhead: Large FIFOs reduce CPU overhead by buffering data, allowing the CPU to perform other tasks.
• Improved data integrity: Automatic flow control prevents data loss due to buffer overflow.
• Flexible communication: Programmable baud rate generator allows for communication with a wide range of serial devices.
• Simplified system design: Integrated UART functionality simplifies system design and reduces component count.

Additional Details

The ST16C654CJ68 supports a wide range of baud rates, making it compatible with various serial devices. It features automatic hardware and software flow control, ensuring reliable data transfer. Each channel has a 64-byte transmit and receive FIFO, reducing CPU intervention and improving system performance. The device is available in a variety of packages, including a 68-pin PLCC (Plastic Leaded Chip Carrier). The ST16C654CJ68 operates from a 3.3V or 5V power supply. It is commonly used in applications where multiple serial ports are required, such as industrial control systems and embedded networking devices. The internal registers are accessible via a parallel interface, allowing the host processor to configure and control the UART channels. The interrupt output can be configured to signal various events, such as data received, transmitter empty, or error conditions.