ISL83490IBZ-T

ISL83490IBZ-T is a RS-485/RS-422 transceiver. It uses slew rate limited drivers which reduces EMI, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. Logic inputs (for example, DI and DE) accept signals in excess of 5.5V, making them compatible with 5V logic families. Receiver (Rx) inputs feature a “fail-safe if open” design, which ensures a logic high output if Rx inputs are floating. All devices present a “single unit load” to the RS-485 bus, which allows up to 32 transceivers on the network. Driver (Tx) outputs are short-circuit protected, even for voltages exceeding the power supply voltage. The application includes factory automation, security networks, building environmental control systems, industrial/process control networks, level translators (for example, RS-232 to RS-422), RS-232 “extension cords”.

• Operate from a single +3.3V supply (10% tolerance), interoperable with 5V logic
• Single unit load allows up to 32 devices on the bus
• Common-mode input voltage range from -7V to +12V
• Current limiting and thermal shutdown for driver overload protection
• Full duplex, 0Mbps data rate, 0.65mA quiescent current
• Receiver short-circuit current is 60mA maximum at (0V ≤ VO ≤ VCC)
• Driver differential output delay is 10ns typical at (RDIFF = 60 ohm, CL = 15pF)
• Driver differential rise or fall time is 5ns typical at (RDIFF = 60 ohm, CL = 15pF)
• Logic input current is 2µA maximum at (VCC = 3.3V, TA = +25°C)
• Operating temperature range from -40°C to 85°C, 8-lead SOIC package