ISL43485IBZ-T

A high speed BiCMOS 3.3V powered, single transceiver that meets both the RS-485 and RS-422 standards for balanced communication. Unlike some competitive devices, this transceiver is specified for 10% tolerance supplies (3V to 3.6V). Data rates up to 30Mbps are achievable by using this transceiver, which features higher slew rates. Logic inputs (for example, DI and DE) accept signals in excess of 5.5Vi, making them compatible with 5V logic families. The receiver (Rx) inputs feature a “fail-safe if open” design, which ensures a logic high output if Rx inputs are floating. The ISL43485 presents a “single unit load” to the RS-485 bus, which allows up to 32 transceivers on the network. 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 becomes excessive.

Applications

• SCSI “Fast 20” drivers and receivers
• Factory automation
• Data loggers
• Security networks
• Building environmental control systems
• Industrial/process control networks
• Level translators

Key features

• High data rate... up to 30Mbps
• Operates from a single +3.3V supply (10% tolerance)
• Interoperable with 5V logic
• Single unit load allows up to 32 devices on the bus
• Low current shutdown mode... 15nA
• -7V to +12V common-mode input voltage range
• Three state Rx and Tx outputs
• 10ns propagation delay, 1ns skew
• Half duplex pinout
• Current limiting and thermal shutdown for driver overload protection
• Pb-free available (RoHS compliant)