Texas Instruments

SN75LBC180N

SN75LBC180N Description

The SN75LBC180N from Texas Instruments is a full-duplex RS-422/RS-485 transceiver designed for robust differential data transmission in industrial and communication systems. Housed in a 14-pin DIP package, this obsolete but historically significant IC operates from a 4.75V to 5.25V supply and supports bidirectional data communication with a single driver/receiver pair. Its 45 mV receiver hysteresis ensures noise immunity in electrically noisy environments, while its 0°C to 70°C operating range makes it suitable for commercial applications. The device is RoHS3 compliant and REACH unaffected, adhering to environmental standards.

SN75LBC180N Features

• Full-duplex operation: Enables simultaneous transmission and reception on separate differential pairs.
• High noise immunity: 45 mV receiver hysteresis minimizes errors in noisy conditions.
• Wide supply range: 4.75V–5.25V compatibility simplifies integration into 5V systems.
• Robust protocol support: Compliant with RS-422 and RS-485 standards for long-distance communication.
• Through-hole mounting: 14-pin DIP package facilitates prototyping and legacy system designs.
• Industrial-grade reliability: 0°C to 70°C operating temperature ensures stable performance.

SN75LBC180N Applications

• Industrial automation: Ideal for PLC communication, motor control, and sensor networks due to noise immunity.
• Telecom infrastructure: Used in modems, base stations, and line drivers for reliable differential signaling.
• Legacy system maintenance: Suitable for retrofitting older RS-422/485 systems where through-hole components are preferred.
• Building automation: Deployed in HVAC controls and security systems requiring robust serial communication.

Conclusion of SN75LBC180N

The SN75LBC180N is a versatile, noise-resistant transceiver tailored for full-duplex RS-422/485 applications. While obsolete, its high hysteresis, wide voltage tolerance, and through-hole design make it a reliable choice for legacy systems and industrial environments. Engineers seeking a proven, rugged solution for differential communication will find this IC well-suited for noise-prone, medium-distance data links. For modern designs, consider TI’s updated alternatives with enhanced features.