The MC1489N is a popular integrated circuit component with widespread use in various electronic devices. It is a quad line receiver chip designed to convert RS-232 voltage levels to TTL/CMOS levels. This component is manufactured by various semiconductor companies and is available in a standard 14-pin DIP (Dual Inline Package) format.
The MC1489N is widely used in communication systems and computer interfaces where data needs to be transmitted and received between different devices using the RS-232 standard. It acts as an interface between the RS-232 serial communication protocol, which uses bipolar signaling with voltage levels of ±5V to ±15V, and the TTL/CMOS logic, which typically uses logic levels of 0V to 5V.
Some of the key features of the MC1489N include:
1. Quad Receiver: The IC contains four independent receivers, which allows it to receive and convert signals from up to four different RS-232 input lines.
2. RS-232 to TTL/CMOS Conversion: The MC1489N converts the RS-232 bipolar signals to standard TTL/CMOS logic levels, making it compatible with a wide range of digital devices.
3. High Receiver Input Impedance: The input impedance of each receiver is typically as high as 3kΩ, which makes the MC1489N suitable for use with a variety of signal sources
