SN75LBC184DR(UMW)

The SN75LBC184 and SN65LBC184 are differential data line transceivers in the industry-standard SN75176 package, featuring built-in high-energy noise transient protection. This feature significantly enhances reliability, providing better immunity to noise transients coupled onto data cables than most existing devices. These circuits enable reliable, low-cost, direct-coupled (without isolation transformers) data line interfaces with no external components required. The SN75LBC184 and SN65LBC184 can withstand overvoltage transients up to 400W peak (typical). The standard combination wave specified in IEC 61000-4-5 simulates overvoltage transients and models unidirectional surges caused by overvoltage resulting from switching and secondary lightning transients. The combination wave is simulated by a double-exponential function defined by independent rise and fall times for voltage and current respectively.

Applications

• Industrial networking
• Utility metering
• Motor control

Key features

• Integrated transient voltage suppression
• Bus terminal ESD protection exceeding: ±30kV IEC 61000-4-2 contact discharge, ±15kV IEC 61000-4-2 air-gap discharge, ±15kV EIA/JEDEC human body model
• IEC 61000-4-5 compliant, 400W peak (typical) circuit damage protection
• Controlled driver output voltage slew rate for longer cable stub lengths in electrically noisy environments at 250kbps
• Quarter-unit load allows 128 devices on the bus
• Open-circuit fail-safe receiver design
• Thermal shutdown protection
• Power-up/power-down glitch protection
• Each transceiver meets or exceeds TIA/EIA-485 (RS-485) and ISO/IEC 8482:1993(E) requirements
• Low disabled-state supply current, 300μA maximum
• Pin-compatible with SN75176