ISL8485EABZ

ISL8485EABZ is an ESD protected, BiCMOS 5V powered, single transceiver that meet both RS-485 and RS-422 standards for balanced communication. Each driver output/receiver input is protected against ±15kV ESD strikes without latch-up. Unlike competitive devices, this family is specified for 10% tolerance supplies (4.5V to 5.5V). Device presents 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 Tx outputs to prevent damage if power dissipation becomes excessive. Application includes factory automation, security networks, building environmental control systems. industrial/process control networks, level translators (such as RS-232 to RS-422), RS-232 “extension cords”.

• Half duplex, 32 number of devices allowed on bus, 10Mbps data rate, 500µA quiescent current
• Receiver/driver enable, ±15kV HBM RS-485 I/O pin ESD protection
• Class 3 ESD level on all other pins is <gt/>7kV HBM, common-mode input voltage range from -7V to +12V
• Three-state Rx and Tx outputs
• 30ns propagation delays, 5ns skew
• Current limiting and thermal shutdown for driver overload protection
• 500µA low quiescent current
• 12kohm minimum receiver input resistance (-7V <lt/> VCM <lt/> 12V)
• 10Mbps maximum data rate (min, VCC = 4.5V to 5.5V, TA = +25°C)
• 8 lead SOIC package, operating temperature range from -40 to +125°C