SN65LBC174A

 Designed for TIA/EIA-485, TIA/EIA-422 andISO 8482 Applications
 Signaling Rates† up to 30 Mbps
 Propagation Delay Times < 11 ns
 Low Standby Power Consumption1.5 mA Max
 Output ESD Protection Exceeds 13 kV
 Driver Positive- and Negative-CurrentLimiting
 Power-Up and Power-Down Glitch-Free forLine Insertion Applications
 Thermal Shutdown Protection
 Industry Standard Pin-Out, CompatibleWith SN75174, MC3487, DS96174, LTC487,and MAX3042

The SN65LBC174A and SN75LBC174A are quadruple differential line drivers with 3-state outputs, designedfor TIA/EIA-485 (RS-485), TIA/EIA-422 (RS-422), and ISO 8482 applications.

SN65LBC174A and SN75LBC174A are optimized for balanced multipoint bus transmission at signalling rates up to 30 million bitsper second. The transmission media may be printed-circuit board traces, backplanes, or cables. The ultimaterate and distance of data transfer SN65LBC174A and SN75LBC174A is dependent upon the attenuation characteristics of the media and the noisecoupling to the environment.

Each driver features current limiting and thermal-shutdown circuitry making it suitable for high-speed multip ointapplications in noisy environments. SN65LBC174A and SN75LBC174A are designed using LinBiCMOS, facilitating low power consumption and robustness.

The two EN inputs of SN65LBC174A and SN75LBC174A provide pair-wise driver enabling, or can be externally tied together to provide enable controlof all four drivers with one signal. When disabled or powered off, the driver outputs of SN65LBC174A and SN75LBC174A present a high-impedanceto the bus for reduced system loading.

The SN75LBC174A is characterized for operation over the temperature range of 0 to 70. TheSN65LBC174A is characterized for operation over the temperature range of −40 to 85.