The ST16C554CQ-F is a quad-channel UART (Universal Asynchronous Receiver/Transmitter) manufactured by Exar Corporation. The 'CQ' likely signifies a specific package type, typically a QFP (Quad Flat Package), and the '-F' indicates a lead-free version. This device provides four independent serial communication channels on a single chip, ideal for applications needing multiple simultaneous serial connections.

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
• 16-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 16-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 ST16C554CQ-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 'CQ' package typically indicates a QFP, which is designed for surface mount assembly on PCBs. The lead-free designation confirms its adherence to environmental regulations such as RoHS.

The device's compatibility with industry-standard UART protocols ensures a versatile solution for many serial communication applications. The internal FIFO buffers and flow control features enable robust and efficient data handling, crucial for reliable system operation when managing multiple serial connections. The quad channels enable communication with four different serial devices simultaneously without resource conflicts.