Texas Instruments

SN75C185N

SN75C185N Description

The SN75C185N from Texas Instruments is a full-duplex RS-232 transceiver designed for robust serial communication in industrial and embedded systems. Housed in a 20-pin DIP (Through Hole) package, it integrates 3 drivers and 5 receivers, supporting bidirectional data transmission with ±12V output swing for reliable signal integrity over long cable runs. Operating within a 4.5V to 13.2V supply range, it is tailored for applications requiring compliance with RS-232 standards, featuring 1.1V receiver hysteresis to enhance noise immunity in electrically noisy environments. With an operating temperature range of 0°C to 70°C, it is suitable for commercial-grade systems.

SN75C185N Features

• Full-Duplex Operation: Enables simultaneous transmission and reception for efficient data exchange.
• Wide Supply Voltage (4.5V–13.2V): Compatible with diverse power supplies, including legacy systems.
• High Noise Immunity: 1.1V receiver hysteresis minimizes false triggering in industrial settings.
• Robust Driver Outputs: ±12V voltage swing ensures compliance with RS-232 signal levels.
• Through-Hole Packaging (20-DIP): Simplifies prototyping and repair in legacy hardware.
• RoHS3 Compliant: Meets environmental standards for lead-free manufacturing.
• Last Time Buy Status: Ideal for end-of-life system maintenance or long-term projects.

SN75C185N Applications

• Industrial Automation: PLCs, motor controllers, and sensor interfaces requiring noise-resistant communication.
• Legacy Equipment Upgrades: Retrofitting RS-232 ports in medical devices or test instruments.
• Embedded Systems: Microcontroller-to-PC communication in development kits or diagnostic tools.
• Telecom Infrastructure: Modems, routers, and switches needing reliable serial data links.
• Point-of-Sale (POS) Terminals: Secure transaction processing with robust ESD protection.

Conclusion of SN75C185N

The SN75C185N stands out for its high noise tolerance, wide voltage range, and full-duplex capability, making it a dependable choice for RS-232 communication in harsh environments. While classified as Last Time Buy, its through-hole design and industrial-grade performance ensure longevity in legacy systems. Engineers seeking a cost-effective, standards-compliant transceiver for noise-prone applications will find this IC a pragmatic solution.