ISL8490 Datasheet | Renesas

feature data rates up to 5Mbps. All devices present a single unit load to the RS-485 bus, which allows up to 32 transceivers on the network. The receiver (Rx) inputs feature a “fail-safe if open” design, which ensures a logic high Rx output if the Rx inputs are floating. The 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 ISL8490 and ISL8491 are configured for full duplex (separate Rx input and Tx output pins) applications. Half duplex configurations (ISL8485) multiplex the Rx inputs and Tx outputs to allow transceivers with Rx and Tx disable functions in 8 Ld packages. Features - Specified for 10% tolerance supplies - Class 3 ESD protection (HBM) on all pins: 7k V - High data rates: up to 5Mbps - Single unit load allows up to 32 devices on the bus - Low quiescent current: 500µA - -7V to +12V mon-mode input voltage range - Three state Rx and Tx outputs (except ISL8490) - 30ns propagation delays, 5ns skew - Full duplex and half duplex pinouts - Operation from a single +5V supply (10% tolerance) - Current limiting and thermal shutdown for driver overload protection - Pb-free plus anneal (Ro HS pliant) Applications - 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” FN6046 Rev 10.02 Oct 2, 2023 Page 1 of 15 © 2003-2023 Renesas Electronics ISL8485, ISL8490, ISL8491 Typical Operating Circuits 5V 100n F 1 RO A/Y 6 2 RE 3 DE RT2 B/Z...