The SN75LBC184 and SN65LBC184 devices are differential data line transceivers in the
trade-standard footprint of the SN75176 with built-in protection against high-energy noise
transients. This feature provides a substantial increase in reliability for better immunity to
noise transients coupled to the data cable over most existing devices. Use of these circuits
provides a reliable low-cost direct-coupled (with no isolation transformer) data line interface
without requiring any external components.
The SN75LBC184 and SN65LBC184 can withstand overvoltage transients of 400-W peak
(typical). The conventional combination wave called out in IEC 61000-4-5 simulates the overvoltage
transient and models a unidirectional surge caused by overvoltages from switching and secondary
lightning transients.
