ISL3177EIUZ

The Intersil ISL3177EIBZ are ±15kV IEC61000 ESD Protected, 3.3V-powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. These devices have very low bus currents (+125mA/-100mA), so they present a true “1/8 unit load” to the RS-485 bus. This allows up to 256 transceivers on the network without violating the RS-485 specification’s 32 unit load maximum, and without using repeaters. For example, in a remote utility meter reading system, individual meter readings are routed to a concentrator via an RS-485 network, so the high allowed node count minimizes the number of repeaters required. The ISL3177EIBZ are configured for full duplex (separate Rx input and Tx output pins) applications. The half duplex versions multiplex the Rx inputs and Tx outputs to allow transceivers with output disable functions in 8 Ld packages.

• ±15kV ESD protected, full fail-safe, low power, high speed, RS-485/RS-422 transceiver
• True 1/8 unit load allows up to 256 devices on the bus
• Single 3.3V supply
• High data rates up to 20Mbps
• Full duplex pinouts
• Current limiting and thermal shutdown for driver overload protection
• Common mode input voltage range -7V to +12V