ISL3155EIBZ-T

The ISL315xE (ISL3150E, ISL3152E, ISL3153E, ISL3155E, ISL3156E, and ISL3158E) family of 5V powered RS-485/RS-422 transceivers features high output drive and high ESD protection. The devices withstand ±16.5kV IEC61000-4-2 ESD strikes without latch-up. The large output voltage of 3.1V typical into a 54Ω load provides high noise immunity, and enables the drive of up to 8000ft long bus segments, or eight 120Ω terminations in a star topology. These devices possess less than 125μA bus input currents, thus constituting a true 1/8 unit load. The high output drive combined with the low bus input currents allows for connecting up to 512 transceivers on the same bus. The receiver inputs feature a full fail-safe design that turns the receiver outputs high when the bus inputs are open or shorted. The ISL315xE family includes half and full-duplex transceivers with active-high driver-enable pins and active-low receiver enable pins. These transceivers support data rates of 115kbps, 1Mbps, and 20Mbps. Their performance is characterized from -40°C to +85°C.

Applications

• Automated utility e-meter reading systems
• High node count systems
• PROFIBUS and Fieldbus systems in factory automation
• Security camera networks
• Lighting, elevator, and HVAC control systems in building automation
• Industrial process control networks
• Networks with star topology
• Long-haul networks in coal mines and oil rigs

Key features

• High VOD: 3.1V (Typ) into RD = 54Ω
• Low bus currents: 125μA constitutes a true 1/8 unit load
• Allows for up to 512 transceivers on the bus
• ±16.5kV ESD protection on bus I/O pins
• High transient overvoltage tolerance of ±100V
• Full fail-safe outputs for open or shorted inputs
• Hot plug capability - driver and receiver outputs remain high-impedance during power-up and power-down
• Supported data rates: 115kbps, 1Mbps, 20Mbps
• Low supply current (driver disabled): 550μA
• Ultra-low shutdown current: 70nA