The National Semiconductor (now Texas Instruments) PC16552DVX(PBF), often referred to as the PC16552, is a dual-channel Universal Asynchronous Receiver/Transmitter (UART) with 16-byte FIFOs. This device integrates two independent UART channels into a single chip, offering a cost-effective and space-saving solution for applications requiring multiple serial communication interfaces. The (PBF) suffix indicates that the device is lead-free.

Applications

• Multi-port serial communication in PCs and embedded systems
• Industrial control systems with multiple serial devices
• Data acquisition systems
• Communication servers
• Modems

Features

• Dual-channel UART
• 16-byte FIFO for transmit and receive on each channel
• Programmable baud rate generator for each channel
• Supports 5, 6, 7, or 8 data bits, and 1, 1.5, or 2 stop bits
• Parity generation and checking (even, odd, none) for each channel
• Modem control signals (CTS, RTS, DSR, DTR, RI, DCD) for each channel
• Interrupt generation

Benefits

• Reduced system cost and complexity: Integrates two UART channels into a single chip, reducing component count and board space.
• Efficient serial communication: The 16-byte FIFOs allow for smoother data transfer, reducing CPU overhead.
• Flexible baud rate selection: The programmable baud rate generators support a wide range of communication speeds for each channel.
• Versatile data format support: Accommodates different data formats, ensuring compatibility with various serial communication protocols.
• Independent channel operation: Each channel can be configured and operated independently, providing flexibility in managing multiple serial devices.

Additional Details

The PC16552DVX(PBF) supports independent configuration of each UART channel, including baud rate, data format, parity, and modem control signals. The FIFO buffers significantly improve data throughput, especially in high-speed communication applications. The device typically operates with a crystal oscillator to generate the clock signal required for the baud rate generators. Refer to the Texas Instruments datasheet for detailed specifications, including pinout diagrams, electrical characteristics, and programming guidelines. The lead-free (PBF) suffix indicates compliance with environmental regulations.