ISL43485 В® Data Sheet March 15, 2005 3.3V, Low Power, 30Mbps, RS-485/RS-422
Transceiver
The Intersil ISL43485 is 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 Intersil 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. Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high output if Rx inputs are floating,
and the ISL43485 presents 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. Additionally,
on-chip thermal shutdown circuitry disables the Tx outputs to
prevent damage if power dissipation becomes excessive. 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 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) Applications SCSI “Fast 20” Drivers and Receivers Factory Automation Data Loggers ISL43485 (SOIC)
TOP VIEW
RO 1 Features -7V to +12V Common Mode Input Voltage Range Logic inputs (e.g., DI and DE) accept signals in excess of
5.5V, making them compatible with 5V logic families. Pinout FN6071.1 Security Networks Building Environmental Control Systems 8 VCC RE 2 7 B/Z Industrial/Process Control Networks DE 3 6 A/Y Level Translators 5 GND Ordering Information DI 4 R D PART NO.
(BRAND) TEMP.
RANGE (В°C) PACKAGE PKG.
DWG. # ISL43485IB …
