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The UM8259A-2 is a dual universal asynchronous receiver/transmitter (DUART) manufactured by UMC (United Microelectronics Corporation).

Specifications:

• Manufacturer: UMC (United Microelectronics Corporation)
• Type: Dual UART (DUART)
• Data Rate: Up to 1 Mbps (varies based on configuration)
• FIFO Buffers: Typically includes 16-byte transmit and receive FIFOs
• Interface: Parallel (8-bit data bus)
• Operating Voltage: Typically 5V (check datasheet for exact range)
• Package: Available in DIP or PLCC packages (exact package depends on variant)
• Features:
• Two independent UART channels
• Programmable baud rate generators
• Modem control signals (CTS, RTS, DSR, DTR, RI, DCD)
• Interrupt-driven operation
• Software-selectable configurations (data bits, parity, stop bits)

Descriptions:

The UM8259A-2 is a dual-channel UART IC designed for serial communication applications. It provides two independent UART channels, each capable of full-duplex operation with configurable baud rates, data formats, and flow control options.

Features:

1. Dual UART Channels: Two independent serial ports in a single IC.

2. FIFO Buffers: Reduces CPU overhead by buffering data.

3. Programmable Baud Rates: Supports a wide range of serial communication speeds.

4. Modem Control Signals: Handles hardware flow control signals.

5. Interrupt Support: Configurable interrupt outputs for efficient data handling.

6. Wide Compatibility: Works with standard UART protocols.

For exact electrical characteristics, pin configurations, and timing details, refer to the official UMC datasheet.