The DS1489AN/MC1489AP is a quad line receiver designed to interface between single-ended transmission lines and digital logic circuits. Manufactured by National Semiconductor (now Texas Instruments), these devices are specifically engineered to meet the requirements of EIA standard RS-232. They provide the necessary voltage level translation and signal conditioning for reliable data communication.

Applications

• RS-232 data transmission systems
• Modems
• Computer peripherals (e.g., printers, plotters)
• Data acquisition systems
• Industrial control equipment

Features

• Four independent receivers in a single package
• Input signal compatibility with EIA RS-232 standards
• Built-in input protection against overvoltage
• Hysteresis for improved noise immunity
• Single 5V power supply operation
• TTL/DTL compatible outputs

Benefits

• Reliable data transmission: The DS1489AN/MC1489AP ensures accurate and consistent data transfer by converting RS-232 voltage levels to TTL/DTL levels, reducing the risk of signal distortion or errors.
• Enhanced noise immunity: Hysteresis at the input stages minimizes the effect of noise and signal fluctuations, ensuring reliable operation in noisy environments.
• Simplified system design: The quad receiver configuration allows for a more compact and efficient system design, reducing component count and board space requirements.
• Overvoltage protection: The built-in input protection safeguards the receiver from damage caused by excessive voltage levels, enhancing system robustness and reliability.
• Cost-effective solution: By integrating four receivers into a single package, the DS1489AN/MC1489AP provides a cost-effective solution for RS-232 interfacing.

Additional Details

The DS1489AN and MC1489AP are functionally equivalent quad line receivers. The input voltage range is typically ±30V. The devices require a single 5V power supply for operation. The output is TTL/DTL compatible, allowing direct interfacing with various logic circuits. The propagation delay is typically 15ns.