The smaller EVM version shows the customer the spaced required for their design. This circuit provides an isolated, 20 Mbps. 3.3V to 3.3V RS-485 interface using the ISO35T, isolated RS-485 transceiver and the TPS76333 high accuracy linear regulator. This circuit achieves signal and power isolation and at the same time decreases space and power consumption.
Features
4000V peak IsolationBus pin ESD protection
- 16KV HBM between bus pins and GND2
- 6KV HBM between bus pins and GND11/8 unit load - up to 256 nodes on a busDesigned to RS-485 and RS-422 applicationsSignaling rates up to 1 MbpsThermal shutdown protectionLow bus capacitance 16 pF (typ)50 KV/us typical transient immunityUL 1577, IEC 60747-5-2 (VDE 0884, Rev. 2) approval pendingFail-safe receiver for bus open, short or idleLogic inputs are 5V tolerant