The ST16C654DCQ-F is a quad-channel UART (Universal Asynchronous Receiver/Transmitter) manufactured by Exar Corporation. The 'DCQ' signifies a specific package type, potentially a QFP (Quad Flat Package) or similar surface-mount package, while the '-F' indicates a lead-free version. This device is designed to provide four independent serial communication channels on a single chip, making it well-suited for applications needing multiple serial interfaces concurrently.

Applications

• Multi-port serial cards
• Industrial automation controllers
• Communication servers
• Embedded systems with multiple serial interfaces
• Data acquisition systems
• Point-of-Sale (POS) systems

Features

• Quad UART channels
• Data rates up to 5 Mbps per channel
• Programmable baud rate generator for each channel
• 32-byte FIFO (First-In, First-Out) transmitter and receiver buffers for each channel
• Automatic hardware/software flow control for each channel
• Modem control signals (CTS, RTS, DSR, DTR, RI, DCD) for each channel
• Interrupt generation
• Loopback mode for diagnostics
• Lead-free package

Benefits

• Quad-channel capability: Provides four independent serial communication channels, maximizing serial connectivity while minimizing component count.
• High-speed data transmission: Supports data rates up to 5 Mbps per channel, enabling fast and efficient serial communication.
• Reduced CPU overhead: The 32-byte FIFOs significantly reduce CPU intervention, improving overall system performance.
• Flexible baud rate generation: Programmable baud rate generator allows for a wide range of baud rates to be selected for each channel, accommodating diverse communication standards.
• Reliable data transfer: Automatic flow control ensures reliable data transfer by preventing buffer overflow on each channel.
• Easy integration: The standard UART interface simplifies integration into existing systems.
• Diagnostic capabilities: Loopback mode enables easy testing and troubleshooting of each channel.
• Environmental Compliance: Lead-free design meets RoHS standards.

Additional Details

The ST16C654DCQ-F operates from a single 5V power supply. It supports 5, 6, 7, or 8 data bits, with even, odd, or no parity, and 1 or 2 stop bits for each of its four channels. The 'DCQ' package will determine the specific physical dimensions and pinout configuration, likely a surface-mount package optimized for PCB assembly. As a lead-free component, it complies with environmental regulations.

Its compliance with industry-standard UART protocols ensures a versatile solution for many serial communication applications. The larger 32-byte internal FIFO buffers and flow control features enable robust and efficient data handling, crucial for reliable system operation when managing multiple high-speed serial connections concurrently. The quad channels facilitate simultaneous communication with up to four distinct serial devices, making it suitable for demanding communication tasks. The larger FIFO buffers, compared to the ST16C554 family, allow for reduced CPU intervention.