Intersil has introduced the ISL3179E and ISL3159E RS-485 high speed Interface product family which feature unrivalled temperature range performance and ESD protection.
The ISL3179E is a high ESD Protected, 3.3V powered, single transceiver and the ISL3159E is a ±15kV IEC61000 ESD protected, 5V powered, single transceiver, both devices meet the RS-485 and RS-422 standards for balanced communication.
The ISL3159E transceiver requires a 5V ±10% tolerance supply, and delivers at least a 2.1V differential output voltage over this supply range. This translates into better noise immunity (data integrity), longer reach, or the ability to drive up to six 120Ω terminations in “star” or other nonstandard bus topologies, at the exceptional 40Mbps data rate. SCSI applications benefit from the ISL3159’s low receiver and transmitter part-to-part skews, which make it perfect for high speed parallel applications where large numbers of bits must be simultaneously captured. The low bit-to-bit skew eases the timing constraints on the data latching signal.
Both the ISL3179E & ISL3159E devices have low bus currents (+220µA/-150µA) which presents a “1/5 unit load” to the RS-485 bus, this allows up to 160 transceivers on the network without violating the RS-485 specification’s 32 unit load maximum, and without using repeaters.
Both device operate in half duplex mode and multiplex the Rx inputs and Tx outputs to allow a transceiver with an output disable function in 8 Ld packages.
The ISL3159E also features the larger output voltage and higher data rate - up to 40Mbps - required by high speed PROFIBUS applications, and are offered in industrial and extended Industrial (-40°C to +125°C) temperature ranges.
Receiver (Rx) inputs feature a “full fail-safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven. Rx outputs feature high drive levels (typically >30mA at VOL = 1V) to ease the design of optically isolated interfaces. Hot plug circuitry ensures that the Tx and Rx outputs remain in a high impedance state while the power supply stabilizes.
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.
Click on the below video to see how Intersil’s ISL3179E 40Mbps transceiver stacks up against similar parts from 2 competitors.
Typical applications:
Anglia are offering customers FREE samples of the ISL3179E & ISL3159E High-Speed RS-485 Transceivers from Intersil, please fill in the form below to register your interest now.
FREE samples for UK and Ireland customers only, subject to availability.
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