The IA8251 provides an interface between a microprocessor and a serial communications channel. The IA8251 receives and transmits data in a variety of configurations including 7- or 8-bit data words, with odd, even , or no parity, and 1 or 2 stop bits. The transmitter and receiver can be designed for synchronous or asynchronous operation.

FEATURES
• Form, Fit, and Function Compatible with the Intelâ 8251A
• Packaging options available: 28 Pin Plastic Dip or 28 Pin Plastic Leaded Chip Carrier
• Synchronous and Asynchronous Operation
• Full Duplex, Double-Buffered Transmitter and Receiver
• Programmable Word Length, Stop Bits, and Parity
• Offers Divide-by-1, -16, or –64 Mode
• Includes:
    - Error Detection
    - False Start Detection
    - Automatic Break Detection and Handling
    - Internal and External Sync Character Detection