COM78C802

Overview

The COM78C802 is a Universal Asynchronous Receiver/Transmitter (UART) integrated circuit manufactured by SMSC. It functions as a serial communication interface component, facilitating data exchange between microprocessors and peripheral devices via asynchronous serial protocols. The device supports standard RS-232 or TTL-level signaling depending on external configuration, enabling reliable point-to-point data transmission in embedded systems. It integrates essential UART functionality including baud rate generation, data framing, and error detection within a compact package suitable for various industrial and consumer electronic applications requiring serial connectivity.

Feature Summary

• Provides universal asynchronous receiver/transmitter capabilities for serial data communication
• Integrates standard UART protocol handling for reliable data transfer
• Supports integration into embedded systems requiring serial interface connectivity

Applications

• Embedded system serial communication interfaces
• Industrial control equipment data links
• Consumer electronics serial port implementations

Procurement Notes

Verify the specific datasheet version and pinout configuration before procurement, as legacy components may have variant revisions. Confirm RoHS compliance status, which is listed as non-compliant in current distributor records. Ensure compatibility with existing board design regarding voltage levels and signal integrity requirements. Check for obsolescence notices or recommended replacement parts from Microchip, the current manufacturer of the SMSC product line.

Selection Notes

Select this component when a dedicated UART interface is required for asynchronous serial communication in legacy or cost-sensitive designs. Evaluate the need for integrated flow control features if hardware handshaking is necessary for the application. Consider the operating temperature range and supply voltage specifications to ensure alignment with the target system environment. Review available package options to match PCB layout constraints and assembly capabilities.

Part Context

SMSC was acquired by Microchip Technology, which now manages the product portfolio formerly under the SMSC brand. The COM78C802 belongs to the category of serial communication controllers, distinct from network or USB controllers also produced by the company. This part represents a standard UART solution, differing from more complex multi-channel or high-speed serial transceivers in the broader catalog.

Replacement Considerations

Consult Microchip's official documentation for direct cross-reference part numbers. Verify pin-to-pin compatibility and register-level equivalence if substituting with newer UART ICs. Ensure that any replacement maintains the same electrical characteristics and protocol support for seamless integration.