ISL8491 Datasheet | Intersil

feature higher slew rates. All devices present a “single unit load” to the RS-485 bus, which allows up to 32 transceivers on the network. Receiver (Rx) inputs feature a “fail-safe if open” design, which ensures a logic high Rx output if Rx inputs are floating. Driver (Tx) outputs are short circuit protected, even for voltages exceeding the power supply voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation bees excessive. The ISL8488 - 91 are configured for full duplex (separate Rx input and Tx output pins) applications. The ISL8488 and ISL8490 are offered in space saving 8 lead packages for applications not requiring Rx and Tx output disable functions (e.g., point-to-point). Half duplex configurations (ISL8483, ISL8485) multiplex the Rx inputs and Tx outputs to allow transceivers with Rx and Tx disable functions in 8 lead packages. Features - Specified for 10% Tolerance Supplies - Class 3 ESD Protection (HBM) on all Pins- . . . >7k V - High Data Rates- - - - . . up to 5Mbps - Slew Rate Limited Versions for Error Free Data Transmission at 250kbps (ISL8483, ISL8488, ISL8489) - Single Unit Load Allows up to 32 Devices on the Bus - 1n A Low Current Shutdown Mode (ISL8483) - Low Quiescent Current: - 160µA (ISL8483, ISL8488, ISL8489) - 500µA (ISL8485, ISL8490, ISL8491) - -7V to +12V mon Mode Input Voltage Range - Three State Rx and Tx Outputs (Except ISL8488, ISL8490) - 30ns Propagation Delays, 5ns Skew (ISL8485, ISL8490, ISL8491) - Full Duplex and Half Duplex Pinouts - Operate from a Single +5V Supply (10% Tolerance) - Current Limiting and Thermal Shutdown for driver Overload Protection - Pb-Free Plus Anneal Available (Ro HS pliant) Applications - Factory Automation - Security Networks - Building Environmental Control Systems - Industrial/Process Control Networks - Level Translators (e.g., RS-232 to RS-422) - RS-232 “Extension Cords” TABLE 1. SUMMARY OF...